/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/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-90.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-24 15:50:11,889 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-24 15:50:11,971 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-24 15:50:11,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-24 15:50:11,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-24 15:50:12,002 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-24 15:50:12,003 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-24 15:50:12,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-24 15:50:12,003 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-24 15:50:12,007 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-24 15:50:12,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-24 15:50:12,007 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-24 15:50:12,008 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-24 15:50:12,009 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-24 15:50:12,009 INFO L153 SettingsManager]: * Use SBE=true [2023-12-24 15:50:12,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-24 15:50:12,010 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-24 15:50:12,010 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-24 15:50:12,010 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-24 15:50:12,010 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-24 15:50:12,011 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-24 15:50:12,011 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-24 15:50:12,011 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-24 15:50:12,011 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-24 15:50:12,012 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-24 15:50:12,012 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-24 15:50:12,012 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-24 15:50:12,012 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-24 15:50:12,012 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-24 15:50:12,012 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-24 15:50:12,013 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-24 15:50:12,013 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-24 15:50:12,014 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-24 15:50:12,014 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-24 15:50:12,014 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 15:50:12,014 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-24 15:50:12,014 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-24 15:50:12,014 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-24 15:50:12,015 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-24 15:50:12,015 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-24 15:50:12,015 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-24 15:50:12,016 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-24 15:50:12,016 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-24 15:50:12,016 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-24 15:50:12,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-24 15:50:12,016 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-24 15:50:12,016 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-24 15:50:12,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-24 15:50:12,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-24 15:50:12,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-24 15:50:12,264 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-24 15:50:12,264 INFO L274 PluginConnector]: CDTParser initialized [2023-12-24 15:50:12,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-90.i [2023-12-24 15:50:13,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-24 15:50:13,551 INFO L384 CDTParser]: Found 1 translation units. [2023-12-24 15:50:13,551 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-90.i [2023-12-24 15:50:13,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c6fb3f9/abcc0f2457b8443aa6befe5866d85565/FLAG0ee04d193 [2023-12-24 15:50:13,571 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c6fb3f9/abcc0f2457b8443aa6befe5866d85565 [2023-12-24 15:50:13,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-24 15:50:13,575 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-24 15:50:13,576 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-24 15:50:13,576 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-24 15:50:13,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-24 15:50:13,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:13,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7feb529d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13, skipping insertion in model container [2023-12-24 15:50:13,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:13,630 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-24 15:50:13,775 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-90.i[917,930] [2023-12-24 15:50:13,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 15:50:13,855 INFO L202 MainTranslator]: Completed pre-run [2023-12-24 15:50:13,863 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-90.i[917,930] [2023-12-24 15:50:13,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 15:50:13,911 INFO L206 MainTranslator]: Completed translation [2023-12-24 15:50:13,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13 WrapperNode [2023-12-24 15:50:13,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-24 15:50:13,913 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-24 15:50:13,913 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-24 15:50:13,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-24 15:50:13,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:13,932 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:13,963 INFO L138 Inliner]: procedures = 33, calls = 165, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 480 [2023-12-24 15:50:13,964 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-24 15:50:13,965 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-24 15:50:13,965 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-24 15:50:13,965 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-24 15:50:13,974 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:13,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:13,983 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:13,999 INFO L175 MemorySlicer]: Split 130 memory accesses to 5 slices as follows [2, 34, 4, 55, 35]. 42 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 1, 6, 3]. The 19 writes are split as follows [0, 6, 1, 6, 6]. [2023-12-24 15:50:14,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:14,000 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:14,017 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:14,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:14,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:14,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:14,032 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-24 15:50:14,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-24 15:50:14,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-24 15:50:14,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-24 15:50:14,039 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (1/1) ... [2023-12-24 15:50:14,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 15:50:14,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-24 15:50:14,074 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) [2023-12-24 15:50:14,086 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 [2023-12-24 15:50:14,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-24 15:50:14,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2023-12-24 15:50:14,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2023-12-24 15:50:14,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2023-12-24 15:50:14,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2023-12-24 15:50:14,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#4 [2023-12-24 15:50:14,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#0 [2023-12-24 15:50:14,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#1 [2023-12-24 15:50:14,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#2 [2023-12-24 15:50:14,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#3 [2023-12-24 15:50:14,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#4 [2023-12-24 15:50:14,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-24 15:50:14,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-24 15:50:14,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-12-24 15:50:14,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-12-24 15:50:14,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-12-24 15:50:14,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2023-12-24 15:50:14,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2023-12-24 15:50:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2023-12-24 15:50:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2023-12-24 15:50:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2023-12-24 15:50:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-12-24 15:50:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-12-24 15:50:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-12-24 15:50:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-12-24 15:50:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-12-24 15:50:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2#0 [2023-12-24 15:50:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2#1 [2023-12-24 15:50:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2#2 [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2#3 [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2#4 [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-24 15:50:14,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-24 15:50:14,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2023-12-24 15:50:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#4 [2023-12-24 15:50:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2#0 [2023-12-24 15:50:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2#1 [2023-12-24 15:50:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2#2 [2023-12-24 15:50:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2#3 [2023-12-24 15:50:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2#4 [2023-12-24 15:50:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-12-24 15:50:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-12-24 15:50:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-12-24 15:50:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-12-24 15:50:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-12-24 15:50:14,265 INFO L241 CfgBuilder]: Building ICFG [2023-12-24 15:50:14,266 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-24 15:50:14,770 INFO L282 CfgBuilder]: Performing block encoding [2023-12-24 15:50:14,823 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-24 15:50:14,823 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-24 15:50:14,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 03:50:14 BoogieIcfgContainer [2023-12-24 15:50:14,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-24 15:50:14,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-24 15:50:14,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-24 15:50:14,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-24 15:50:14,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.12 03:50:13" (1/3) ... [2023-12-24 15:50:14,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b7f147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 03:50:14, skipping insertion in model container [2023-12-24 15:50:14,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 03:50:13" (2/3) ... [2023-12-24 15:50:14,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b7f147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 03:50:14, skipping insertion in model container [2023-12-24 15:50:14,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 03:50:14" (3/3) ... [2023-12-24 15:50:14,831 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-ap_file-90.i [2023-12-24 15:50:14,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-24 15:50:14,846 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-24 15:50:14,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-24 15:50:14,911 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;@bd2ecb4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-24 15:50:14,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-24 15:50:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 82 states have internal predecessors, (114), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-24 15:50:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-24 15:50:14,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:50:14,933 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:50:14,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:50:14,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:50:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1081033117, now seen corresponding path program 1 times [2023-12-24 15:50:14,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:50:14,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347323791] [2023-12-24 15:50:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:50:14,956 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 [2023-12-24 15:50:14,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:50:14,964 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) [2023-12-24 15:50:14,996 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 [2023-12-24 15:50:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:50:15,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-24 15:50:15,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:50:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-12-24 15:50:15,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 15:50:15,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:50:15,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347323791] [2023-12-24 15:50:15,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347323791] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 15:50:15,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 15:50:15,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-24 15:50:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044294538] [2023-12-24 15:50:15,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 15:50:15,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-24 15:50:15,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:50:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-24 15:50:15,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 15:50:15,343 INFO L87 Difference]: Start difference. First operand has 104 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 82 states have internal predecessors, (114), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-24 15:50:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:50:15,387 INFO L93 Difference]: Finished difference Result 205 states and 326 transitions. [2023-12-24 15:50:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-24 15:50:15,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 148 [2023-12-24 15:50:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:50:15,396 INFO L225 Difference]: With dead ends: 205 [2023-12-24 15:50:15,396 INFO L226 Difference]: Without dead ends: 102 [2023-12-24 15:50:15,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 15:50:15,401 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 15:50:15,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 145 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 15:50:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-24 15:50:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-12-24 15:50:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.3625) internal successors, (109), 80 states have internal predecessors, (109), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-24 15:50:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 149 transitions. [2023-12-24 15:50:15,440 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 149 transitions. Word has length 148 [2023-12-24 15:50:15,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:50:15,440 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 149 transitions. [2023-12-24 15:50:15,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-24 15:50:15,441 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 149 transitions. [2023-12-24 15:50:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-24 15:50:15,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:50:15,444 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:50:15,452 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 (2)] Forceful destruction successful, exit code 0 [2023-12-24 15:50:15,652 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 [2023-12-24 15:50:15,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:50:15,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:50:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash 363461691, now seen corresponding path program 1 times [2023-12-24 15:50:15,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:50:15,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704885351] [2023-12-24 15:50:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:50:15,655 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 [2023-12-24 15:50:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:50:15,657 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) [2023-12-24 15:50:15,685 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 [2023-12-24 15:50:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:50:15,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-24 15:50:15,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:50:15,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:50:15,968 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 [2023-12-24 15:50:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 15:50:15,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 15:50:15,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:50:15,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704885351] [2023-12-24 15:50:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704885351] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 15:50:15,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 15:50:15,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-24 15:50:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799002400] [2023-12-24 15:50:15,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 15:50:15,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-24 15:50:15,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:50:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-24 15:50:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-24 15:50:15,994 INFO L87 Difference]: Start difference. First operand 102 states and 149 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:50:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:50:16,140 INFO L93 Difference]: Finished difference Result 247 states and 360 transitions. [2023-12-24 15:50:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-24 15:50:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 148 [2023-12-24 15:50:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:50:16,144 INFO L225 Difference]: With dead ends: 247 [2023-12-24 15:50:16,144 INFO L226 Difference]: Without dead ends: 146 [2023-12-24 15:50:16,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-24 15:50:16,146 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 58 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 15:50:16,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 679 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 15:50:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-24 15:50:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2023-12-24 15:50:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.3529411764705883) internal successors, (115), 85 states have internal predecessors, (115), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-24 15:50:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 155 transitions. [2023-12-24 15:50:16,165 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 155 transitions. Word has length 148 [2023-12-24 15:50:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:50:16,167 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 155 transitions. [2023-12-24 15:50:16,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:50:16,168 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 155 transitions. [2023-12-24 15:50:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-24 15:50:16,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:50:16,174 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:50:16,180 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 [2023-12-24 15:50:16,380 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 [2023-12-24 15:50:16,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:50:16,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:50:16,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1325482051, now seen corresponding path program 1 times [2023-12-24 15:50:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:50:16,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754632484] [2023-12-24 15:50:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:50:16,382 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 [2023-12-24 15:50:16,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:50:16,384 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) [2023-12-24 15:50:16,386 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 [2023-12-24 15:50:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:50:16,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-24 15:50:16,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:50:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 15:50:16,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 15:50:16,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:50:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754632484] [2023-12-24 15:50:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754632484] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 15:50:16,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 15:50:16,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-24 15:50:16,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315850798] [2023-12-24 15:50:16,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 15:50:16,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-24 15:50:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:50:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-24 15:50:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-24 15:50:16,622 INFO L87 Difference]: Start difference. First operand 107 states and 155 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:50:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:50:16,670 INFO L93 Difference]: Finished difference Result 241 states and 351 transitions. [2023-12-24 15:50:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-24 15:50:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 148 [2023-12-24 15:50:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:50:16,672 INFO L225 Difference]: With dead ends: 241 [2023-12-24 15:50:16,672 INFO L226 Difference]: Without dead ends: 135 [2023-12-24 15:50:16,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-24 15:50:16,673 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 61 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 15:50:16,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 466 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 15:50:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-24 15:50:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2023-12-24 15:50:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 87 states have internal predecessors, (117), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-24 15:50:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2023-12-24 15:50:16,688 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 148 [2023-12-24 15:50:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:50:16,689 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2023-12-24 15:50:16,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:50:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2023-12-24 15:50:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-24 15:50:16,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:50:16,691 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:50:16,703 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 [2023-12-24 15:50:16,904 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 [2023-12-24 15:50:16,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:50:16,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:50:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2127917406, now seen corresponding path program 1 times [2023-12-24 15:50:16,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:50:16,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878309744] [2023-12-24 15:50:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:50:16,906 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 [2023-12-24 15:50:16,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:50:16,908 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) [2023-12-24 15:50:16,910 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 [2023-12-24 15:50:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:50:17,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-24 15:50:17,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:50:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 15:50:17,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 15:50:17,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:50:17,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878309744] [2023-12-24 15:50:17,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878309744] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 15:50:17,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 15:50:17,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-24 15:50:17,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814180023] [2023-12-24 15:50:17,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 15:50:17,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-24 15:50:17,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:50:17,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-24 15:50:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-24 15:50:17,159 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:50:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:50:17,288 INFO L93 Difference]: Finished difference Result 278 states and 401 transitions. [2023-12-24 15:50:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-24 15:50:17,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 150 [2023-12-24 15:50:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:50:17,290 INFO L225 Difference]: With dead ends: 278 [2023-12-24 15:50:17,290 INFO L226 Difference]: Without dead ends: 170 [2023-12-24 15:50:17,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-24 15:50:17,291 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 128 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 15:50:17,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 541 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 15:50:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-24 15:50:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2023-12-24 15:50:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-24 15:50:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2023-12-24 15:50:17,306 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 150 [2023-12-24 15:50:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:50:17,307 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2023-12-24 15:50:17,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:50:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2023-12-24 15:50:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-24 15:50:17,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:50:17,310 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:50:17,320 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 [2023-12-24 15:50:17,512 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 [2023-12-24 15:50:17,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:50:17,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:50:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 213927120, now seen corresponding path program 1 times [2023-12-24 15:50:17,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:50:17,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830465272] [2023-12-24 15:50:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:50:17,514 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 [2023-12-24 15:50:17,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:50:17,515 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) [2023-12-24 15:50:17,520 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 [2023-12-24 15:50:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:50:17,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-24 15:50:17,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:50:18,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-12-24 15:50:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 15:50:18,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 15:50:18,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:50:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830465272] [2023-12-24 15:50:18,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830465272] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 15:50:18,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 15:50:18,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-24 15:50:18,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611339177] [2023-12-24 15:50:18,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 15:50:18,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-24 15:50:18,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:50:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-24 15:50:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-24 15:50:18,869 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:50:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:50:19,079 INFO L93 Difference]: Finished difference Result 245 states and 349 transitions. [2023-12-24 15:50:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-24 15:50:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 151 [2023-12-24 15:50:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:50:19,082 INFO L225 Difference]: With dead ends: 245 [2023-12-24 15:50:19,082 INFO L226 Difference]: Without dead ends: 135 [2023-12-24 15:50:19,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-12-24 15:50:19,083 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 281 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 15:50:19,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 525 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 15:50:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-24 15:50:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 118. [2023-12-24 15:50:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 95 states have internal predecessors, (125), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-24 15:50:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2023-12-24 15:50:19,100 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 151 [2023-12-24 15:50:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:50:19,100 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2023-12-24 15:50:19,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:50:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2023-12-24 15:50:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-24 15:50:19,102 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:50:19,103 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:50:19,116 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 (6)] Forceful destruction successful, exit code 0 [2023-12-24 15:50:19,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 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 [2023-12-24 15:50:19,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:50:19,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:50:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1885677381, now seen corresponding path program 1 times [2023-12-24 15:50:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:50:19,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672056840] [2023-12-24 15:50:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:50:19,311 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 [2023-12-24 15:50:19,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:50:19,311 INFO L229 MonitoredProcess]: Starting monitored process 7 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) [2023-12-24 15:50:19,312 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 (7)] Waiting until timeout for monitored process [2023-12-24 15:50:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:50:19,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-24 15:50:19,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:50:19,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-12-24 15:50:20,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 34 [2023-12-24 15:50:20,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:50:20,423 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 1 case distinctions, treesize of input 56 treesize of output 35 [2023-12-24 15:50:25,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:50:25,412 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 60 treesize of output 34 [2023-12-24 15:50:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 40 proven. 348 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2023-12-24 15:50:25,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:50:25,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:50:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672056840] [2023-12-24 15:50:25,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672056840] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:50:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116035012] [2023-12-24 15:50:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:50:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 15:50:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 15:50:25,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 15:50:25,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-12-24 15:50:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:50:26,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-24 15:50:26,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:50:28,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:50:28,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-24 15:50:29,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-12-24 15:50:29,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-12-24 15:50:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 52 proven. 147 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-12-24 15:50:29,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:50:30,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116035012] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:50:30,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 15:50:30,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2023-12-24 15:50:30,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099940035] [2023-12-24 15:50:30,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 15:50:30,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-24 15:50:30,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:50:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-24 15:50:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1183, Unknown=1, NotChecked=0, Total=1332 [2023-12-24 15:50:30,973 INFO L87 Difference]: Start difference. First operand 118 states and 165 transitions. Second operand has 27 states, 23 states have (on average 4.739130434782608) internal successors, (109), 21 states have internal predecessors, (109), 9 states have call successors, (40), 8 states have call predecessors, (40), 9 states have return successors, (40), 8 states have call predecessors, (40), 9 states have call successors, (40) [2023-12-24 15:50:47,387 WARN L293 SmtUtils]: Spent 16.14s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:51:03,606 WARN L293 SmtUtils]: Spent 16.17s on a formula simplification. DAG size of input: 75 DAG size of output: 74 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:51:19,917 WARN L293 SmtUtils]: Spent 16.17s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:51:38,222 WARN L293 SmtUtils]: Spent 16.12s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:51:54,439 WARN L293 SmtUtils]: Spent 16.14s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:52:10,707 WARN L293 SmtUtils]: Spent 16.16s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:52:27,375 WARN L293 SmtUtils]: Spent 16.15s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:52:44,157 WARN L293 SmtUtils]: Spent 16.16s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:53:00,388 WARN L293 SmtUtils]: Spent 16.15s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:53:16,604 WARN L293 SmtUtils]: Spent 16.14s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:53:32,971 WARN L293 SmtUtils]: Spent 16.13s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:53:49,290 WARN L293 SmtUtils]: Spent 16.18s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 15:53:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:53:50,236 INFO L93 Difference]: Finished difference Result 257 states and 348 transitions. [2023-12-24 15:53:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-24 15:53:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 4.739130434782608) internal successors, (109), 21 states have internal predecessors, (109), 9 states have call successors, (40), 8 states have call predecessors, (40), 9 states have return successors, (40), 8 states have call predecessors, (40), 9 states have call successors, (40) Word has length 152 [2023-12-24 15:53:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:53:50,240 INFO L225 Difference]: With dead ends: 257 [2023-12-24 15:53:50,240 INFO L226 Difference]: Without dead ends: 140 [2023-12-24 15:53:50,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 203.4s TimeCoverageRelationStatistics Valid=902, Invalid=3653, Unknown=1, NotChecked=0, Total=4556 [2023-12-24 15:53:50,242 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 703 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-24 15:53:50,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 1005 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-24 15:53:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-24 15:53:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2023-12-24 15:53:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 105 states have internal predecessors, (131), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-24 15:53:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 175 transitions. [2023-12-24 15:53:50,264 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 175 transitions. Word has length 152 [2023-12-24 15:53:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:53:50,265 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 175 transitions. [2023-12-24 15:53:50,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 4.739130434782608) internal successors, (109), 21 states have internal predecessors, (109), 9 states have call successors, (40), 8 states have call predecessors, (40), 9 states have return successors, (40), 8 states have call predecessors, (40), 9 states have call successors, (40) [2023-12-24 15:53:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 175 transitions. [2023-12-24 15:53:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-24 15:53:50,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:53:50,266 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:53:50,276 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 (7)] Forceful destruction successful, exit code 0 [2023-12-24 15:53:50,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2023-12-24 15:53:50,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 15:53:50,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:53:50,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:53:50,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1239351844, now seen corresponding path program 1 times [2023-12-24 15:53:50,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:53:50,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994010479] [2023-12-24 15:53:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:53:50,669 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 [2023-12-24 15:53:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:53:50,669 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) [2023-12-24 15:53:50,670 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 [2023-12-24 15:53:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:53:50,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-24 15:53:50,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:53:50,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:53:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 15:53:51,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2023-12-24 15:53:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 15:53:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 15:53:51,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2023-12-24 15:53:51,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:53:51,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2023-12-24 15:53:52,653 INFO L349 Elim1Store]: treesize reduction 80, result has 47.7 percent of original size [2023-12-24 15:53:52,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 97 [2023-12-24 15:53:54,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:53:54,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 181 treesize of output 575 [2023-12-24 15:53:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 39 proven. 348 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2023-12-24 15:53:54,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:53:54,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:53:54,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994010479] [2023-12-24 15:53:54,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994010479] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:53:54,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717536621] [2023-12-24 15:53:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:53:54,350 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 15:53:54,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 15:53:54,355 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) [2023-12-24 15:53:54,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-24 15:53:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:53:54,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-24 15:53:54,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:53:54,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:53:55,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-12-24 15:53:55,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2023-12-24 15:53:55,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2023-12-24 15:53:57,555 INFO L349 Elim1Store]: treesize reduction 76, result has 41.1 percent of original size [2023-12-24 15:53:57,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 77 [2023-12-24 15:53:57,894 INFO L349 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2023-12-24 15:53:57,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 85 [2023-12-24 15:53:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 39 proven. 348 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2023-12-24 15:53:57,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:53:58,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [717536621] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:53:58,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 15:53:58,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-12-24 15:53:58,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110422968] [2023-12-24 15:53:58,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 15:53:58,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-24 15:53:58,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:53:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-24 15:53:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-12-24 15:53:58,086 INFO L87 Difference]: Start difference. First operand 133 states and 175 transitions. Second operand has 24 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 10 states have call successors, (40), 8 states have call predecessors, (40), 10 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-12-24 15:54:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:54:00,189 INFO L93 Difference]: Finished difference Result 325 states and 419 transitions. [2023-12-24 15:54:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-24 15:54:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 10 states have call successors, (40), 8 states have call predecessors, (40), 10 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 153 [2023-12-24 15:54:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:54:00,196 INFO L225 Difference]: With dead ends: 325 [2023-12-24 15:54:00,196 INFO L226 Difference]: Without dead ends: 197 [2023-12-24 15:54:00,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 509 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=361, Invalid=1361, Unknown=0, NotChecked=0, Total=1722 [2023-12-24 15:54:00,198 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 712 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-24 15:54:00,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 1340 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-24 15:54:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-12-24 15:54:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2023-12-24 15:54:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 112 states have (on average 1.25) internal successors, (140), 112 states have internal predecessors, (140), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-24 15:54:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 180 transitions. [2023-12-24 15:54:00,230 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 180 transitions. Word has length 153 [2023-12-24 15:54:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:54:00,230 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 180 transitions. [2023-12-24 15:54:00,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 10 states have call successors, (40), 8 states have call predecessors, (40), 10 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-12-24 15:54:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 180 transitions. [2023-12-24 15:54:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-24 15:54:00,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:54:00,232 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:54:00,239 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 (9)] Forceful destruction successful, exit code 0 [2023-12-24 15:54:00,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2023-12-24 15:54:00,640 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 [2023-12-24 15:54:00,640 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:54:00,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:54:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash 392104301, now seen corresponding path program 1 times [2023-12-24 15:54:00,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:54:00,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374966064] [2023-12-24 15:54:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:54:00,642 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 [2023-12-24 15:54:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:54:00,643 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) [2023-12-24 15:54:00,648 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 [2023-12-24 15:54:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:54:00,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-24 15:54:00,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:54:00,986 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 [2023-12-24 15:54:02,917 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 1 [2023-12-24 15:54:03,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-12-24 15:54:05,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2023-12-24 15:54:05,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 52 [2023-12-24 15:54:05,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:54:05,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2023-12-24 15:54:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 88 proven. 336 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-12-24 15:54:05,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:54:07,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:54:07,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374966064] [2023-12-24 15:54:07,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374966064] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:54:07,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [131737234] [2023-12-24 15:54:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:54:07,722 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 15:54:07,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 15:54:07,724 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 15:54:07,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-12-24 15:54:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:54:08,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-24 15:54:08,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:54:08,281 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 [2023-12-24 15:54:10,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:54:11,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2023-12-24 15:54:13,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2023-12-24 15:54:14,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2023-12-24 15:54:14,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 37 [2023-12-24 15:54:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 100 proven. 336 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-24 15:54:14,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:54:15,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [131737234] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:54:15,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 15:54:15,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 41 [2023-12-24 15:54:15,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694471550] [2023-12-24 15:54:15,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 15:54:15,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-24 15:54:15,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:54:15,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-24 15:54:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2290, Unknown=0, NotChecked=0, Total=2652 [2023-12-24 15:54:15,565 INFO L87 Difference]: Start difference. First operand 141 states and 180 transitions. Second operand has 42 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 36 states have internal predecessors, (118), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 15:54:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:54:36,275 INFO L93 Difference]: Finished difference Result 789 states and 1025 transitions. [2023-12-24 15:54:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-24 15:54:36,276 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 36 states have internal predecessors, (118), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) Word has length 153 [2023-12-24 15:54:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:54:36,279 INFO L225 Difference]: With dead ends: 789 [2023-12-24 15:54:36,279 INFO L226 Difference]: Without dead ends: 649 [2023-12-24 15:54:36,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=1342, Invalid=7029, Unknown=1, NotChecked=0, Total=8372 [2023-12-24 15:54:36,282 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 3389 mSDsluCounter, 3791 mSDsCounter, 0 mSdLazyCounter, 3087 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3389 SdHoareTripleChecker+Valid, 3982 SdHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 3087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-24 15:54:36,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3389 Valid, 3982 Invalid, 3626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 3087 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-24 15:54:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-12-24 15:54:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 326. [2023-12-24 15:54:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 254 states have (on average 1.220472440944882) internal successors, (310), 255 states have internal predecessors, (310), 48 states have call successors, (48), 23 states have call predecessors, (48), 23 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-24 15:54:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 406 transitions. [2023-12-24 15:54:36,354 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 406 transitions. Word has length 153 [2023-12-24 15:54:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:54:36,355 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 406 transitions. [2023-12-24 15:54:36,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 36 states have internal predecessors, (118), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 15:54:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 406 transitions. [2023-12-24 15:54:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-24 15:54:36,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:54:36,357 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:54:36,366 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 (11)] Ended with exit code 0 [2023-12-24 15:54:36,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2023-12-24 15:54:36,764 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=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 15:54:36,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:54:36,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:54:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash -194701713, now seen corresponding path program 1 times [2023-12-24 15:54:36,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:54:36,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046439730] [2023-12-24 15:54:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:54:36,765 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 [2023-12-24 15:54:36,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:54:36,766 INFO L229 MonitoredProcess]: Starting monitored process 13 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) [2023-12-24 15:54:36,767 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 (13)] Waiting until timeout for monitored process [2023-12-24 15:54:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:54:37,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-24 15:54:37,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:54:37,146 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 [2023-12-24 15:54:39,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-24 15:54:39,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:54:40,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-12-24 15:54:42,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2023-12-24 15:54:43,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 57 [2023-12-24 15:54:43,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:54:43,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 48 [2023-12-24 15:54:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 39 proven. 336 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-24 15:54:43,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:54:56,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:54:56,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046439730] [2023-12-24 15:54:56,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046439730] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:54:56,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1389959679] [2023-12-24 15:54:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:54:56,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 15:54:56,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 15:54:56,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 15:54:56,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-12-24 15:54:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:54:57,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-24 15:54:57,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:54:57,620 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 [2023-12-24 15:55:01,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:55:01,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-24 15:55:04,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 33 [2023-12-24 15:55:08,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2023-12-24 15:55:09,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 72 [2023-12-24 15:55:10,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 69 [2023-12-24 15:55:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 180 proven. 336 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2023-12-24 15:55:10,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:55:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1389959679] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:55:30,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 15:55:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 39 [2023-12-24 15:55:30,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075072864] [2023-12-24 15:55:30,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 15:55:30,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-24 15:55:30,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:55:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-24 15:55:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=3233, Unknown=4, NotChecked=0, Total=3906 [2023-12-24 15:55:30,301 INFO L87 Difference]: Start difference. First operand 326 states and 406 transitions. Second operand has 40 states, 37 states have (on average 3.189189189189189) internal successors, (118), 35 states have internal predecessors, (118), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 15:55:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:55:47,133 INFO L93 Difference]: Finished difference Result 740 states and 940 transitions. [2023-12-24 15:55:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-24 15:55:47,134 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 3.189189189189189) internal successors, (118), 35 states have internal predecessors, (118), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) Word has length 153 [2023-12-24 15:55:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:55:47,137 INFO L225 Difference]: With dead ends: 740 [2023-12-24 15:55:47,137 INFO L226 Difference]: Without dead ends: 530 [2023-12-24 15:55:47,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2524 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=1563, Invalid=6805, Unknown=4, NotChecked=0, Total=8372 [2023-12-24 15:55:47,139 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 1367 mSDsluCounter, 3400 mSDsCounter, 0 mSdLazyCounter, 2902 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 3602 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-12-24 15:55:47,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 3602 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2902 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-12-24 15:55:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2023-12-24 15:55:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 326. [2023-12-24 15:55:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 254 states have (on average 1.2165354330708662) internal successors, (309), 255 states have internal predecessors, (309), 48 states have call successors, (48), 23 states have call predecessors, (48), 23 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-24 15:55:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 405 transitions. [2023-12-24 15:55:47,210 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 405 transitions. Word has length 153 [2023-12-24 15:55:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:55:47,211 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 405 transitions. [2023-12-24 15:55:47,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 3.189189189189189) internal successors, (118), 35 states have internal predecessors, (118), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 15:55:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 405 transitions. [2023-12-24 15:55:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-24 15:55:47,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:55:47,212 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:55:47,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2023-12-24 15:55:47,418 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 (13)] Forceful destruction successful, exit code 0 [2023-12-24 15:55:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /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 [2023-12-24 15:55:47,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:55:47,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:55:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1196243601, now seen corresponding path program 1 times [2023-12-24 15:55:47,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:55:47,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612956159] [2023-12-24 15:55:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:55:47,614 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 [2023-12-24 15:55:47,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:55:47,615 INFO L229 MonitoredProcess]: Starting monitored process 15 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) [2023-12-24 15:55:47,617 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 (15)] Waiting until timeout for monitored process [2023-12-24 15:55:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:55:47,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-24 15:55:47,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:55:48,142 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 [2023-12-24 15:55:52,297 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 8 treesize of output 1 [2023-12-24 15:55:53,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:55:54,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-24 15:55:58,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2023-12-24 15:55:58,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 54 [2023-12-24 15:55:58,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:55:58,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 45 [2023-12-24 15:55:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 39 proven. 336 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-24 15:55:59,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:56:15,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:56:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612956159] [2023-12-24 15:56:15,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612956159] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:56:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1783748951] [2023-12-24 15:56:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:56:15,042 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 15:56:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 15:56:15,045 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 15:56:15,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-24 15:56:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:56:15,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-24 15:56:15,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:56:15,803 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 [2023-12-24 15:56:20,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:56:21,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-24 15:56:24,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 29 [2023-12-24 15:56:29,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 51 [2023-12-24 15:56:30,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 58 [2023-12-24 15:56:31,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 49 [2023-12-24 15:56:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 178 proven. 336 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-12-24 15:56:31,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:56:41,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1783748951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:56:41,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 15:56:41,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 37 [2023-12-24 15:56:41,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352253371] [2023-12-24 15:56:41,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 15:56:41,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-24 15:56:41,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:56:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-24 15:56:41,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1869, Unknown=2, NotChecked=0, Total=2256 [2023-12-24 15:56:41,270 INFO L87 Difference]: Start difference. First operand 326 states and 405 transitions. Second operand has 38 states, 35 states have (on average 3.342857142857143) internal successors, (117), 34 states have internal predecessors, (117), 8 states have call successors, (40), 6 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 15:56:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:56:54,897 INFO L93 Difference]: Finished difference Result 738 states and 937 transitions. [2023-12-24 15:56:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-24 15:56:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 3.342857142857143) internal successors, (117), 34 states have internal predecessors, (117), 8 states have call successors, (40), 6 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) Word has length 153 [2023-12-24 15:56:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:56:54,901 INFO L225 Difference]: With dead ends: 738 [2023-12-24 15:56:54,901 INFO L226 Difference]: Without dead ends: 528 [2023-12-24 15:56:54,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=1017, Invalid=4531, Unknown=2, NotChecked=0, Total=5550 [2023-12-24 15:56:54,903 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1188 mSDsluCounter, 2649 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-12-24 15:56:54,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 2790 Invalid, 2665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-12-24 15:56:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-12-24 15:56:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 326. [2023-12-24 15:56:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 254 states have (on average 1.2125984251968505) internal successors, (308), 255 states have internal predecessors, (308), 48 states have call successors, (48), 23 states have call predecessors, (48), 23 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-24 15:56:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 404 transitions. [2023-12-24 15:56:54,980 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 404 transitions. Word has length 153 [2023-12-24 15:56:54,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:56:54,980 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 404 transitions. [2023-12-24 15:56:54,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 3.342857142857143) internal successors, (117), 34 states have internal predecessors, (117), 8 states have call successors, (40), 6 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 15:56:54,980 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 404 transitions. [2023-12-24 15:56:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-24 15:56:54,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:56:54,981 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:56:54,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-12-24 15:56:55,191 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 (15)] Ended with exit code 0 [2023-12-24 15:56:55,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /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 [2023-12-24 15:56:55,385 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:56:55,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:56:55,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1783049615, now seen corresponding path program 1 times [2023-12-24 15:56:55,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:56:55,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281943048] [2023-12-24 15:56:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:56:55,386 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 [2023-12-24 15:56:55,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:56:55,387 INFO L229 MonitoredProcess]: Starting monitored process 17 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) [2023-12-24 15:56:55,388 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 (17)] Waiting until timeout for monitored process [2023-12-24 15:56:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:56:55,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-24 15:56:55,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:56:57,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-24 15:56:58,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:56:58,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-24 15:56:59,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-24 15:57:00,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2023-12-24 15:57:00,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:57:00,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 21 [2023-12-24 15:57:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 96 proven. 336 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-12-24 15:57:00,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:57:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 15:57:00,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:57:00,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281943048] [2023-12-24 15:57:00,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281943048] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 15:57:00,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-24 15:57:00,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-12-24 15:57:00,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759545855] [2023-12-24 15:57:00,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 15:57:00,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-24 15:57:00,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:57:00,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-24 15:57:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-12-24 15:57:00,678 INFO L87 Difference]: Start difference. First operand 326 states and 404 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:57:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:57:02,091 INFO L93 Difference]: Finished difference Result 821 states and 1053 transitions. [2023-12-24 15:57:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-24 15:57:02,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 153 [2023-12-24 15:57:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:57:02,095 INFO L225 Difference]: With dead ends: 821 [2023-12-24 15:57:02,095 INFO L226 Difference]: Without dead ends: 624 [2023-12-24 15:57:02,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-12-24 15:57:02,096 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 280 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-24 15:57:02,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1465 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-24 15:57:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2023-12-24 15:57:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 330. [2023-12-24 15:57:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 258 states have (on average 1.2170542635658914) internal successors, (314), 259 states have internal predecessors, (314), 48 states have call successors, (48), 23 states have call predecessors, (48), 23 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-24 15:57:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 410 transitions. [2023-12-24 15:57:02,173 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 410 transitions. Word has length 153 [2023-12-24 15:57:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:57:02,173 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 410 transitions. [2023-12-24 15:57:02,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:57:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 410 transitions. [2023-12-24 15:57:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-24 15:57:02,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:57:02,175 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:57:02,182 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 (17)] Forceful destruction successful, exit code 0 [2023-12-24 15:57:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /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 [2023-12-24 15:57:02,382 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:57:02,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:57:02,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1093704175, now seen corresponding path program 1 times [2023-12-24 15:57:02,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:57:02,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121134436] [2023-12-24 15:57:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:57:02,383 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 [2023-12-24 15:57:02,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:57:02,384 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) [2023-12-24 15:57:02,386 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 [2023-12-24 15:57:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:57:02,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-24 15:57:02,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:57:05,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:57:06,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:57:08,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-24 15:57:08,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-12-24 15:57:08,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:57:08,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 30 [2023-12-24 15:57:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-24 15:57:08,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:57:10,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:57:10,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121134436] [2023-12-24 15:57:10,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121134436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:57:10,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1281384202] [2023-12-24 15:57:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:57:10,090 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 15:57:10,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 15:57:10,091 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) [2023-12-24 15:57:10,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-24 15:57:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:57:10,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-24 15:57:10,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:57:10,901 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 [2023-12-24 15:57:14,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 15:57:15,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:57:16,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-12-24 15:57:22,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 52 [2023-12-24 15:57:23,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 73 [2023-12-24 15:57:24,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 61 [2023-12-24 15:57:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 142 proven. 318 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-12-24 15:57:24,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:57:37,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1281384202] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:57:37,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 15:57:37,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 25] total 32 [2023-12-24 15:57:37,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724150623] [2023-12-24 15:57:37,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 15:57:37,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-24 15:57:37,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:57:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-24 15:57:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2032, Unknown=1, NotChecked=0, Total=2450 [2023-12-24 15:57:37,232 INFO L87 Difference]: Start difference. First operand 330 states and 410 transitions. Second operand has 33 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 6 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 15:58:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:58:09,620 INFO L93 Difference]: Finished difference Result 1410 states and 1835 transitions. [2023-12-24 15:58:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-24 15:58:09,622 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 6 states have call predecessors, (40), 8 states have call successors, (40) Word has length 153 [2023-12-24 15:58:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:58:09,626 INFO L225 Difference]: With dead ends: 1410 [2023-12-24 15:58:09,626 INFO L226 Difference]: Without dead ends: 1193 [2023-12-24 15:58:09,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3470 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=2268, Invalid=10613, Unknown=1, NotChecked=0, Total=12882 [2023-12-24 15:58:09,631 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 1856 mSDsluCounter, 5962 mSDsCounter, 0 mSdLazyCounter, 4390 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1856 SdHoareTripleChecker+Valid, 6348 SdHoareTripleChecker+Invalid, 4710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2023-12-24 15:58:09,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1856 Valid, 6348 Invalid, 4710 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [320 Valid, 4390 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2023-12-24 15:58:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2023-12-24 15:58:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 732. [2023-12-24 15:58:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 586 states have (on average 1.235494880546075) internal successors, (724), 592 states have internal predecessors, (724), 96 states have call successors, (96), 49 states have call predecessors, (96), 49 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2023-12-24 15:58:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 916 transitions. [2023-12-24 15:58:09,828 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 916 transitions. Word has length 153 [2023-12-24 15:58:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:58:09,829 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 916 transitions. [2023-12-24 15:58:09,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 6 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 15:58:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 916 transitions. [2023-12-24 15:58:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-24 15:58:09,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:58:09,831 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:58:09,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2023-12-24 15:58:10,043 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 [2023-12-24 15:58:10,237 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 [2023-12-24 15:58:10,238 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:58:10,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:58:10,238 INFO L85 PathProgramCache]: Analyzing trace with hash -494643727, now seen corresponding path program 1 times [2023-12-24 15:58:10,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:58:10,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303349187] [2023-12-24 15:58:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:58:10,239 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 [2023-12-24 15:58:10,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:58:10,240 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) [2023-12-24 15:58:10,241 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 [2023-12-24 15:58:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:58:10,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-24 15:58:10,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:58:10,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-24 15:58:15,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:58:16,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:58:19,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-12-24 15:58:19,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2023-12-24 15:58:20,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:58:20,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38 [2023-12-24 15:58:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-24 15:58:20,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:58:32,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:58:32,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303349187] [2023-12-24 15:58:32,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303349187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:58:32,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1149903197] [2023-12-24 15:58:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:58:32,659 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 15:58:32,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 15:58:32,660 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) [2023-12-24 15:58:32,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-24 15:58:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:58:33,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-24 15:58:33,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:58:33,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-24 15:58:37,822 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 15 treesize of output 1 [2023-12-24 15:58:38,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:58:40,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-24 15:58:45,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2023-12-24 15:58:46,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 60 [2023-12-24 15:58:47,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 51 [2023-12-24 15:58:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 138 proven. 318 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-12-24 15:58:47,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:58:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1149903197] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:58:57,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 15:58:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21] total 32 [2023-12-24 15:58:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864715798] [2023-12-24 15:58:57,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 15:58:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-24 15:58:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:58:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-24 15:58:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1563, Unknown=2, NotChecked=0, Total=1892 [2023-12-24 15:58:57,963 INFO L87 Difference]: Start difference. First operand 732 states and 916 transitions. Second operand has 33 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 7 states have call successors, (40), 6 states have call predecessors, (40), 7 states have return successors, (40), 5 states have call predecessors, (40), 7 states have call successors, (40) [2023-12-24 15:59:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:59:12,646 INFO L93 Difference]: Finished difference Result 1321 states and 1677 transitions. [2023-12-24 15:59:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-24 15:59:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 7 states have call successors, (40), 6 states have call predecessors, (40), 7 states have return successors, (40), 5 states have call predecessors, (40), 7 states have call successors, (40) Word has length 153 [2023-12-24 15:59:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:59:12,651 INFO L225 Difference]: With dead ends: 1321 [2023-12-24 15:59:12,652 INFO L226 Difference]: Without dead ends: 948 [2023-12-24 15:59:12,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 326 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=998, Invalid=4256, Unknown=2, NotChecked=0, Total=5256 [2023-12-24 15:59:12,654 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 984 mSDsluCounter, 4005 mSDsCounter, 0 mSdLazyCounter, 2958 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 4262 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-12-24 15:59:12,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 4262 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2958 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2023-12-24 15:59:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2023-12-24 15:59:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 668. [2023-12-24 15:59:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 533 states have (on average 1.2288930581613509) internal successors, (655), 538 states have internal predecessors, (655), 88 states have call successors, (88), 46 states have call predecessors, (88), 46 states have return successors, (88), 83 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-24 15:59:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 831 transitions. [2023-12-24 15:59:12,821 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 831 transitions. Word has length 153 [2023-12-24 15:59:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:59:12,821 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 831 transitions. [2023-12-24 15:59:12,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 7 states have call successors, (40), 6 states have call predecessors, (40), 7 states have return successors, (40), 5 states have call predecessors, (40), 7 states have call successors, (40) [2023-12-24 15:59:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 831 transitions. [2023-12-24 15:59:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-24 15:59:12,823 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:59:12,823 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:59:12,830 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 [2023-12-24 15:59:13,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-12-24 15:59:13,224 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 [2023-12-24 15:59:13,225 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:59:13,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:59:13,225 INFO L85 PathProgramCache]: Analyzing trace with hash -360052923, now seen corresponding path program 1 times [2023-12-24 15:59:13,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:59:13,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134310772] [2023-12-24 15:59:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:59:13,226 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 [2023-12-24 15:59:13,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:59:13,227 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) [2023-12-24 15:59:13,227 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 [2023-12-24 15:59:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:59:13,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-24 15:59:13,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:59:13,574 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 [2023-12-24 15:59:15,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-24 15:59:15,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-24 15:59:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 15:59:15,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 15:59:15,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:59:15,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134310772] [2023-12-24 15:59:15,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134310772] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 15:59:15,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 15:59:15,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-24 15:59:15,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400929864] [2023-12-24 15:59:15,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 15:59:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-24 15:59:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:59:15,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-24 15:59:15,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-24 15:59:15,883 INFO L87 Difference]: Start difference. First operand 668 states and 831 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:59:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:59:17,721 INFO L93 Difference]: Finished difference Result 1284 states and 1662 transitions. [2023-12-24 15:59:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-24 15:59:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 154 [2023-12-24 15:59:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:59:17,725 INFO L225 Difference]: With dead ends: 1284 [2023-12-24 15:59:17,725 INFO L226 Difference]: Without dead ends: 989 [2023-12-24 15:59:17,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-12-24 15:59:17,727 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 470 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-24 15:59:17,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 673 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-24 15:59:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2023-12-24 15:59:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 672. [2023-12-24 15:59:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 537 states have (on average 1.229050279329609) internal successors, (660), 542 states have internal predecessors, (660), 88 states have call successors, (88), 46 states have call predecessors, (88), 46 states have return successors, (88), 83 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-24 15:59:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 836 transitions. [2023-12-24 15:59:17,901 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 836 transitions. Word has length 154 [2023-12-24 15:59:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:59:17,901 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 836 transitions. [2023-12-24 15:59:17,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:59:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 836 transitions. [2023-12-24 15:59:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-24 15:59:17,903 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:59:17,903 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:59:17,910 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 [2023-12-24 15:59:18,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 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 [2023-12-24 15:59:18,110 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:59:18,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:59:18,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1371170173, now seen corresponding path program 1 times [2023-12-24 15:59:18,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:59:18,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393960026] [2023-12-24 15:59:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:59:18,111 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 [2023-12-24 15:59:18,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:59:18,112 INFO L229 MonitoredProcess]: Starting monitored process 23 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) [2023-12-24 15:59:18,115 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 (23)] Waiting until timeout for monitored process [2023-12-24 15:59:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:59:18,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-24 15:59:18,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:59:19,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-12-24 15:59:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 15:59:19,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 15:59:19,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:59:19,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393960026] [2023-12-24 15:59:19,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393960026] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 15:59:19,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 15:59:19,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-24 15:59:19,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546440320] [2023-12-24 15:59:19,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 15:59:19,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-24 15:59:19,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 15:59:19,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-24 15:59:19,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-24 15:59:19,950 INFO L87 Difference]: Start difference. First operand 672 states and 836 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:59:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 15:59:20,664 INFO L93 Difference]: Finished difference Result 1358 states and 1733 transitions. [2023-12-24 15:59:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-24 15:59:20,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 154 [2023-12-24 15:59:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 15:59:20,667 INFO L225 Difference]: With dead ends: 1358 [2023-12-24 15:59:20,668 INFO L226 Difference]: Without dead ends: 900 [2023-12-24 15:59:20,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2023-12-24 15:59:20,669 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 304 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-24 15:59:20,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 685 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-24 15:59:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2023-12-24 15:59:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 678. [2023-12-24 15:59:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 543 states have (on average 1.2265193370165746) internal successors, (666), 548 states have internal predecessors, (666), 88 states have call successors, (88), 46 states have call predecessors, (88), 46 states have return successors, (88), 83 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-24 15:59:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 842 transitions. [2023-12-24 15:59:20,884 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 842 transitions. Word has length 154 [2023-12-24 15:59:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 15:59:20,884 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 842 transitions. [2023-12-24 15:59:20,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 15:59:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 842 transitions. [2023-12-24 15:59:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-24 15:59:20,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 15:59:20,887 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 15:59:20,897 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 (23)] Forceful destruction successful, exit code 0 [2023-12-24 15:59:21,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /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 [2023-12-24 15:59:21,095 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 15:59:21,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 15:59:21,095 INFO L85 PathProgramCache]: Analyzing trace with hash -968565213, now seen corresponding path program 1 times [2023-12-24 15:59:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 15:59:21,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355066732] [2023-12-24 15:59:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:59:21,096 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 [2023-12-24 15:59:21,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 15:59:21,097 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) [2023-12-24 15:59:21,098 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 [2023-12-24 15:59:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:59:21,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-24 15:59:21,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:59:25,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-24 15:59:25,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:59:26,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 15:59:28,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 15:59:28,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2023-12-24 15:59:29,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 15:59:29,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 24 [2023-12-24 15:59:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-24 15:59:29,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 15:59:39,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 15:59:39,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355066732] [2023-12-24 15:59:39,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355066732] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 15:59:39,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [848744677] [2023-12-24 15:59:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 15:59:39,926 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 15:59:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 15:59:39,927 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) [2023-12-24 15:59:39,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-12-24 15:59:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 15:59:40,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-24 15:59:40,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 15:59:43,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 15:59:44,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-24 15:59:45,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-12-24 15:59:48,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-12-24 15:59:57,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 72 [2023-12-24 15:59:59,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 84 [2023-12-24 15:59:59,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 59 [2023-12-24 16:00:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 291 proven. 321 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-12-24 16:00:00,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:00:15,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [848744677] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:00:15,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 16:00:15,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 35] total 42 [2023-12-24 16:00:15,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800636547] [2023-12-24 16:00:15,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 16:00:15,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-24 16:00:15,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:00:15,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-24 16:00:15,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2209, Unknown=2, NotChecked=0, Total=2756 [2023-12-24 16:00:15,740 INFO L87 Difference]: Start difference. First operand 678 states and 842 transitions. Second operand has 43 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 35 states have internal predecessors, (126), 10 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (40), 8 states have call predecessors, (40), 10 states have call successors, (40) [2023-12-24 16:00:20,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 16:00:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:00:56,786 INFO L93 Difference]: Finished difference Result 1984 states and 2470 transitions. [2023-12-24 16:00:56,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-24 16:00:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 35 states have internal predecessors, (126), 10 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (40), 8 states have call predecessors, (40), 10 states have call successors, (40) Word has length 154 [2023-12-24 16:00:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:00:56,793 INFO L225 Difference]: With dead ends: 1984 [2023-12-24 16:00:56,793 INFO L226 Difference]: Without dead ends: 1686 [2023-12-24 16:00:56,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3970 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=2497, Invalid=10611, Unknown=2, NotChecked=0, Total=13110 [2023-12-24 16:00:56,795 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 2191 mSDsluCounter, 3080 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 3251 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2023-12-24 16:00:56,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2195 Valid, 3251 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time] [2023-12-24 16:00:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2023-12-24 16:00:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 503. [2023-12-24 16:00:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 396 states have (on average 1.1944444444444444) internal successors, (473), 398 states have internal predecessors, (473), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:00:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 597 transitions. [2023-12-24 16:00:56,971 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 597 transitions. Word has length 154 [2023-12-24 16:00:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:00:56,971 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 597 transitions. [2023-12-24 16:00:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 35 states have internal predecessors, (126), 10 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (40), 8 states have call predecessors, (40), 10 states have call successors, (40) [2023-12-24 16:00:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 597 transitions. [2023-12-24 16:00:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-24 16:00:56,973 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:00:56,973 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:00:56,984 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 [2023-12-24 16:00:57,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2023-12-24 16:00:57,394 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 [2023-12-24 16:00:57,394 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:00:57,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:00:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1970107101, now seen corresponding path program 1 times [2023-12-24 16:00:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:00:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186911957] [2023-12-24 16:00:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:00:57,395 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 [2023-12-24 16:00:57,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:00:57,396 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) [2023-12-24 16:00:57,398 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 [2023-12-24 16:00:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:00:57,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-24 16:00:57,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:01:01,523 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 8 treesize of output 1 [2023-12-24 16:01:02,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 16:01:03,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-24 16:01:06,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2023-12-24 16:01:06,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2023-12-24 16:01:06,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:01:06,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 35 [2023-12-24 16:01:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 96 proven. 336 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-12-24 16:01:07,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:01:15,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:01:15,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186911957] [2023-12-24 16:01:15,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186911957] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:01:15,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [779397166] [2023-12-24 16:01:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:01:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 16:01:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 16:01:15,658 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) [2023-12-24 16:01:15,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-24 16:01:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:01:16,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-24 16:01:16,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:01:20,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 16:01:21,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-24 16:01:24,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-12-24 16:01:32,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 51 [2023-12-24 16:01:33,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 64 [2023-12-24 16:01:34,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 56 [2023-12-24 16:01:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 240 proven. 312 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-12-24 16:01:34,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:01:48,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [779397166] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:01:48,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 16:01:48,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 29] total 37 [2023-12-24 16:01:48,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514580285] [2023-12-24 16:01:48,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 16:01:48,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-24 16:01:48,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:01:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-24 16:01:48,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1687, Unknown=2, NotChecked=0, Total=2070 [2023-12-24 16:01:48,825 INFO L87 Difference]: Start difference. First operand 503 states and 597 transitions. Second operand has 38 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 31 states have internal predecessors, (126), 10 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (40), 9 states have call predecessors, (40), 10 states have call successors, (40) [2023-12-24 16:02:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:02:15,716 INFO L93 Difference]: Finished difference Result 1369 states and 1648 transitions. [2023-12-24 16:02:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-24 16:02:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 31 states have internal predecessors, (126), 10 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (40), 9 states have call predecessors, (40), 10 states have call successors, (40) Word has length 154 [2023-12-24 16:02:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:02:15,721 INFO L225 Difference]: With dead ends: 1369 [2023-12-24 16:02:15,721 INFO L226 Difference]: Without dead ends: 1108 [2023-12-24 16:02:15,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=1528, Invalid=5780, Unknown=2, NotChecked=0, Total=7310 [2023-12-24 16:02:15,723 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1347 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 3157 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2023-12-24 16:02:15,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1348 Valid, 3157 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2023-12-24 16:02:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2023-12-24 16:02:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 493. [2023-12-24 16:02:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 386 states have (on average 1.1917098445595855) internal successors, (460), 388 states have internal predecessors, (460), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:02:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 584 transitions. [2023-12-24 16:02:15,919 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 584 transitions. Word has length 154 [2023-12-24 16:02:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:02:15,919 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 584 transitions. [2023-12-24 16:02:15,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 31 states have internal predecessors, (126), 10 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (40), 9 states have call predecessors, (40), 10 states have call successors, (40) [2023-12-24 16:02:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 584 transitions. [2023-12-24 16:02:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-24 16:02:15,921 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:02:15,921 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:02:15,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2023-12-24 16:02:16,133 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 (26)] Forceful destruction successful, exit code 0 [2023-12-24 16:02:16,327 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 [2023-12-24 16:02:16,328 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:02:16,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:02:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash 358675781, now seen corresponding path program 1 times [2023-12-24 16:02:16,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:02:16,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676394374] [2023-12-24 16:02:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:16,329 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 [2023-12-24 16:02:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:02:16,330 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) [2023-12-24 16:02:16,330 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 [2023-12-24 16:02:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:16,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-24 16:02:16,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:16,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-24 16:02:17,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-12-24 16:02:18,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-12-24 16:02:20,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:02:20,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2023-12-24 16:02:21,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:02:21,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 34 [2023-12-24 16:02:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 38 proven. 348 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-12-24 16:02:21,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:02:21,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:02:21,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676394374] [2023-12-24 16:02:21,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676394374] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:02:21,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451436643] [2023-12-24 16:02:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:21,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 16:02:21,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 16:02:21,309 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 16:02:21,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2023-12-24 16:02:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:21,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-24 16:02:21,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:22,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 16:02:22,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-24 16:02:23,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-24 16:02:25,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 28 [2023-12-24 16:02:26,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2023-12-24 16:02:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 32 proven. 336 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-24 16:02:26,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:02:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451436643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:02:26,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 16:02:26,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2023-12-24 16:02:26,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5293694] [2023-12-24 16:02:26,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 16:02:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-24 16:02:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:02:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-24 16:02:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-12-24 16:02:26,417 INFO L87 Difference]: Start difference. First operand 493 states and 584 transitions. Second operand has 21 states, 19 states have (on average 6.631578947368421) internal successors, (126), 18 states have internal predecessors, (126), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 16:02:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:02:29,259 INFO L93 Difference]: Finished difference Result 884 states and 1051 transitions. [2023-12-24 16:02:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-24 16:02:29,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 6.631578947368421) internal successors, (126), 18 states have internal predecessors, (126), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) Word has length 156 [2023-12-24 16:02:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:02:29,262 INFO L225 Difference]: With dead ends: 884 [2023-12-24 16:02:29,263 INFO L226 Difference]: Without dead ends: 521 [2023-12-24 16:02:29,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-24 16:02:29,264 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 614 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-24 16:02:29,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 674 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-24 16:02:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-12-24 16:02:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 493. [2023-12-24 16:02:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 386 states have (on average 1.1839378238341969) internal successors, (457), 388 states have internal predecessors, (457), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:02:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 581 transitions. [2023-12-24 16:02:29,474 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 581 transitions. Word has length 156 [2023-12-24 16:02:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:02:29,475 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 581 transitions. [2023-12-24 16:02:29,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 6.631578947368421) internal successors, (126), 18 states have internal predecessors, (126), 8 states have call successors, (40), 7 states have call predecessors, (40), 8 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-24 16:02:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 581 transitions. [2023-12-24 16:02:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-24 16:02:29,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:02:29,476 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:02:29,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2023-12-24 16:02:29,681 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 [2023-12-24 16:02:29,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,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 [2023-12-24 16:02:29,877 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:02:29,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:02:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -34351229, now seen corresponding path program 1 times [2023-12-24 16:02:29,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:02:29,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155098149] [2023-12-24 16:02:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:29,878 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 [2023-12-24 16:02:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:02:29,879 INFO L229 MonitoredProcess]: Starting monitored process 30 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) [2023-12-24 16:02:29,880 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 (30)] Waiting until timeout for monitored process [2023-12-24 16:02:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:30,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-24 16:02:30,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:30,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 16:02:30,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-24 16:02:31,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-12-24 16:02:31,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-12-24 16:02:34,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2023-12-24 16:02:34,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:02:34,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 37 [2023-12-24 16:02:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 39 proven. 348 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2023-12-24 16:02:34,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:02:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 16:02:35,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:02:35,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155098149] [2023-12-24 16:02:35,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155098149] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 16:02:35,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-24 16:02:35,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 21 [2023-12-24 16:02:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281348592] [2023-12-24 16:02:35,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 16:02:35,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-24 16:02:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:02:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-24 16:02:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-12-24 16:02:35,488 INFO L87 Difference]: Start difference. First operand 493 states and 581 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:02:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:02:36,523 INFO L93 Difference]: Finished difference Result 962 states and 1159 transitions. [2023-12-24 16:02:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-24 16:02:36,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 156 [2023-12-24 16:02:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:02:36,525 INFO L225 Difference]: With dead ends: 962 [2023-12-24 16:02:36,525 INFO L226 Difference]: Without dead ends: 599 [2023-12-24 16:02:36,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-12-24 16:02:36,527 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 127 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-24 16:02:36,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1022 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-24 16:02:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2023-12-24 16:02:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 545. [2023-12-24 16:02:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 438 states have (on average 1.1917808219178083) internal successors, (522), 440 states have internal predecessors, (522), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:02:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 646 transitions. [2023-12-24 16:02:36,790 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 646 transitions. Word has length 156 [2023-12-24 16:02:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:02:36,790 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 646 transitions. [2023-12-24 16:02:36,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:02:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 646 transitions. [2023-12-24 16:02:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-24 16:02:36,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:02:36,791 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:02:36,803 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 (30)] Forceful destruction successful, exit code 0 [2023-12-24 16:02:36,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /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 [2023-12-24 16:02:37,000 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:02:37,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:02:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash 207211356, now seen corresponding path program 1 times [2023-12-24 16:02:37,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:02:37,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647791622] [2023-12-24 16:02:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:37,001 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 [2023-12-24 16:02:37,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:02:37,002 INFO L229 MonitoredProcess]: Starting monitored process 31 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) [2023-12-24 16:02:37,002 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 (31)] Waiting until timeout for monitored process [2023-12-24 16:02:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:37,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-24 16:02:37,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:40,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-24 16:02:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 12 proven. 400 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-12-24 16:02:40,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:02:40,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:02:40,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647791622] [2023-12-24 16:02:40,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647791622] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:02:40,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1572383084] [2023-12-24 16:02:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:40,507 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 16:02:40,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 16:02:40,508 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 16:02:40,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-24 16:02:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:40,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-24 16:02:40,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:42,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 16:02:44,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-12-24 16:02:44,307 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 [2023-12-24 16:02:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-24 16:02:44,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:02:44,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1572383084] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:02:44,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 16:02:44,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2023-12-24 16:02:44,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059633680] [2023-12-24 16:02:44,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 16:02:44,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-24 16:02:44,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:02:44,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-24 16:02:44,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-12-24 16:02:44,515 INFO L87 Difference]: Start difference. First operand 545 states and 646 transitions. Second operand has 17 states, 16 states have (on average 7.25) internal successors, (116), 15 states have internal predecessors, (116), 5 states have call successors, (40), 5 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 5 states have call successors, (40) [2023-12-24 16:02:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:02:47,111 INFO L93 Difference]: Finished difference Result 1130 states and 1354 transitions. [2023-12-24 16:02:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-24 16:02:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 7.25) internal successors, (116), 15 states have internal predecessors, (116), 5 states have call successors, (40), 5 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 5 states have call successors, (40) Word has length 156 [2023-12-24 16:02:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:02:47,114 INFO L225 Difference]: With dead ends: 1130 [2023-12-24 16:02:47,114 INFO L226 Difference]: Without dead ends: 721 [2023-12-24 16:02:47,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2023-12-24 16:02:47,116 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 589 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-24 16:02:47,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 870 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-24 16:02:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2023-12-24 16:02:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 545. [2023-12-24 16:02:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 438 states have (on average 1.187214611872146) internal successors, (520), 440 states have internal predecessors, (520), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:02:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 644 transitions. [2023-12-24 16:02:47,359 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 644 transitions. Word has length 156 [2023-12-24 16:02:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:02:47,359 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 644 transitions. [2023-12-24 16:02:47,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 7.25) internal successors, (116), 15 states have internal predecessors, (116), 5 states have call successors, (40), 5 states have call predecessors, (40), 5 states have return successors, (40), 4 states have call predecessors, (40), 5 states have call successors, (40) [2023-12-24 16:02:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 644 transitions. [2023-12-24 16:02:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-24 16:02:47,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:02:47,360 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:02:47,368 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 (31)] Forceful destruction successful, exit code 0 [2023-12-24 16:02:47,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2023-12-24 16:02:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /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=3,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 16:02:47,768 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:02:47,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:02:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1446718376, now seen corresponding path program 1 times [2023-12-24 16:02:47,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:02:47,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297079580] [2023-12-24 16:02:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:47,769 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 [2023-12-24 16:02:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:02:47,771 INFO L229 MonitoredProcess]: Starting monitored process 33 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) [2023-12-24 16:02:47,774 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 (33)] Waiting until timeout for monitored process [2023-12-24 16:02:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:47,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-24 16:02:47,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:48,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-12-24 16:02:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 16:02:48,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 16:02:48,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:02:48,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297079580] [2023-12-24 16:02:48,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297079580] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 16:02:48,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 16:02:48,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-24 16:02:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160979583] [2023-12-24 16:02:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 16:02:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-24 16:02:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:02:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-24 16:02:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-24 16:02:48,462 INFO L87 Difference]: Start difference. First operand 545 states and 644 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:02:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:02:49,022 INFO L93 Difference]: Finished difference Result 1178 states and 1433 transitions. [2023-12-24 16:02:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-24 16:02:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 156 [2023-12-24 16:02:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:02:49,025 INFO L225 Difference]: With dead ends: 1178 [2023-12-24 16:02:49,025 INFO L226 Difference]: Without dead ends: 769 [2023-12-24 16:02:49,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-24 16:02:49,026 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 100 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-24 16:02:49,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 386 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-24 16:02:49,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2023-12-24 16:02:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 632. [2023-12-24 16:02:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 525 states have (on average 1.217142857142857) internal successors, (639), 527 states have internal predecessors, (639), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:02:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 763 transitions. [2023-12-24 16:02:49,229 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 763 transitions. Word has length 156 [2023-12-24 16:02:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:02:49,229 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 763 transitions. [2023-12-24 16:02:49,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:02:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 763 transitions. [2023-12-24 16:02:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-24 16:02:49,230 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:02:49,230 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:02:49,235 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 (33)] Forceful destruction successful, exit code 0 [2023-12-24 16:02:49,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /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 [2023-12-24 16:02:49,431 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:02:49,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:02:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash 859912362, now seen corresponding path program 1 times [2023-12-24 16:02:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:02:49,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48299466] [2023-12-24 16:02:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:49,432 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 [2023-12-24 16:02:49,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:02:49,433 INFO L229 MonitoredProcess]: Starting monitored process 34 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) [2023-12-24 16:02:49,434 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 (34)] Waiting until timeout for monitored process [2023-12-24 16:02:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:49,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-24 16:02:49,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:51,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-12-24 16:02:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 16:02:51,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 16:02:51,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:02:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48299466] [2023-12-24 16:02:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48299466] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 16:02:51,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 16:02:51,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-24 16:02:51,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240462996] [2023-12-24 16:02:51,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 16:02:51,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-24 16:02:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:02:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-24 16:02:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-24 16:02:51,776 INFO L87 Difference]: Start difference. First operand 632 states and 763 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:02:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:02:52,809 INFO L93 Difference]: Finished difference Result 1265 states and 1551 transitions. [2023-12-24 16:02:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-24 16:02:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 156 [2023-12-24 16:02:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:02:52,812 INFO L225 Difference]: With dead ends: 1265 [2023-12-24 16:02:52,812 INFO L226 Difference]: Without dead ends: 773 [2023-12-24 16:02:52,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2023-12-24 16:02:52,813 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 230 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-24 16:02:52,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 760 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-24 16:02:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-12-24 16:02:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 612. [2023-12-24 16:02:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 505 states have (on average 1.2158415841584158) internal successors, (614), 507 states have internal predecessors, (614), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:02:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 738 transitions. [2023-12-24 16:02:53,020 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 738 transitions. Word has length 156 [2023-12-24 16:02:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:02:53,021 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 738 transitions. [2023-12-24 16:02:53,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:02:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 738 transitions. [2023-12-24 16:02:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-24 16:02:53,022 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:02:53,022 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:02:53,029 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 (34)] Forceful destruction successful, exit code 0 [2023-12-24 16:02:53,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /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 [2023-12-24 16:02:53,230 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:02:53,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:02:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1136893850, now seen corresponding path program 1 times [2023-12-24 16:02:53,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:02:53,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156972716] [2023-12-24 16:02:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:53,231 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 [2023-12-24 16:02:53,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:02:53,232 INFO L229 MonitoredProcess]: Starting monitored process 35 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) [2023-12-24 16:02:53,233 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 (35)] Waiting until timeout for monitored process [2023-12-24 16:02:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:53,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-24 16:02:53,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:53,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 16:02:53,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-24 16:02:54,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-24 16:02:54,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-12-24 16:02:56,193 INFO L349 Elim1Store]: treesize reduction 26, result has 46.9 percent of original size [2023-12-24 16:02:56,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 40 [2023-12-24 16:02:56,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:02:56,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 42 [2023-12-24 16:02:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 23 proven. 348 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2023-12-24 16:02:56,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:02:56,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:02:56,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156972716] [2023-12-24 16:02:56,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156972716] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:02:56,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892042481] [2023-12-24 16:02:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:02:56,738 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 16:02:56,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 16:02:56,739 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 16:02:56,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-24 16:02:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:02:57,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-24 16:02:57,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:02:58,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 16:03:00,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2023-12-24 16:03:00,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 16:03:00,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 56 [2023-12-24 16:03:00,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 16 [2023-12-24 16:03:00,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 36 [2023-12-24 16:03:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-24 16:03:01,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:03:01,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 219 [2023-12-24 16:03:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 16:03:02,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [892042481] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 16:03:02,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-24 16:03:02,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 7] total 23 [2023-12-24 16:03:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635308087] [2023-12-24 16:03:02,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 16:03:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-24 16:03:02,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:03:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-24 16:03:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2023-12-24 16:03:02,202 INFO L87 Difference]: Start difference. First operand 612 states and 738 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-24 16:03:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:03:02,968 INFO L93 Difference]: Finished difference Result 1104 states and 1347 transitions. [2023-12-24 16:03:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-24 16:03:02,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 156 [2023-12-24 16:03:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:03:02,970 INFO L225 Difference]: With dead ends: 1104 [2023-12-24 16:03:02,970 INFO L226 Difference]: Without dead ends: 632 [2023-12-24 16:03:02,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-12-24 16:03:02,972 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 350 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-24 16:03:02,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 431 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-24 16:03:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2023-12-24 16:03:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 606. [2023-12-24 16:03:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 499 states have (on average 1.2124248496993988) internal successors, (605), 501 states have internal predecessors, (605), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:03:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 729 transitions. [2023-12-24 16:03:03,185 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 729 transitions. Word has length 156 [2023-12-24 16:03:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:03:03,186 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 729 transitions. [2023-12-24 16:03:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-24 16:03:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 729 transitions. [2023-12-24 16:03:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-24 16:03:03,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:03:03,187 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:03:03,194 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 (35)] Forceful destruction successful, exit code 0 [2023-12-24 16:03:03,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-24 16:03:03,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /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=3,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 16:03:03,588 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:03:03,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:03:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1378456435, now seen corresponding path program 1 times [2023-12-24 16:03:03,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:03:03,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674858969] [2023-12-24 16:03:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:03:03,589 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 [2023-12-24 16:03:03,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:03:03,590 INFO L229 MonitoredProcess]: Starting monitored process 37 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) [2023-12-24 16:03:03,590 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 (37)] Waiting until timeout for monitored process [2023-12-24 16:03:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:03:03,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-24 16:03:03,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:03:03,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 16:03:04,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 16:03:04,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2023-12-24 16:03:04,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 16:03:04,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 16:03:04,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2023-12-24 16:03:04,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:03:04,807 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 1 case distinctions, treesize of input 33 treesize of output 35 [2023-12-24 16:03:06,686 INFO L349 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2023-12-24 16:03:06,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 74 [2023-12-24 16:03:07,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:03:07,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 128 treesize of output 356 [2023-12-24 16:03:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 23 proven. 348 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2023-12-24 16:03:07,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:03:08,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:03:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674858969] [2023-12-24 16:03:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674858969] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:03:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [208343248] [2023-12-24 16:03:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:03:08,398 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 16:03:08,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 16:03:08,399 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 16:03:08,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2023-12-24 16:03:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:03:08,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-24 16:03:08,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:03:09,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2023-12-24 16:03:10,016 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 12 treesize of output 8 [2023-12-24 16:03:12,092 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 53 treesize of output 37 [2023-12-24 16:03:12,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-24 16:03:12,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 65 [2023-12-24 16:03:12,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 19 [2023-12-24 16:03:12,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-12-24 16:03:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-24 16:03:12,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:03:14,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [208343248] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:03:14,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 16:03:14,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 18 [2023-12-24 16:03:14,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634843117] [2023-12-24 16:03:14,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 16:03:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-24 16:03:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:03:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-24 16:03:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-12-24 16:03:14,103 INFO L87 Difference]: Start difference. First operand 606 states and 729 transitions. Second operand has 19 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 6 states have call successors, (40), 5 states have call predecessors, (40), 6 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-12-24 16:03:18,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 16:03:24,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 16:03:29,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 16:03:34,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-24 16:03:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:03:34,767 INFO L93 Difference]: Finished difference Result 1246 states and 1514 transitions. [2023-12-24 16:03:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-24 16:03:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 6 states have call successors, (40), 5 states have call predecessors, (40), 6 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 156 [2023-12-24 16:03:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:03:34,770 INFO L225 Difference]: With dead ends: 1246 [2023-12-24 16:03:34,770 INFO L226 Difference]: Without dead ends: 774 [2023-12-24 16:03:34,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=601, Invalid=2479, Unknown=0, NotChecked=0, Total=3080 [2023-12-24 16:03:34,771 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 789 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 179 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2023-12-24 16:03:34,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 1297 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 931 Invalid, 3 Unknown, 0 Unchecked, 16.2s Time] [2023-12-24 16:03:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-12-24 16:03:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 621. [2023-12-24 16:03:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 514 states have (on average 1.2081712062256809) internal successors, (621), 516 states have internal predecessors, (621), 62 states have call successors, (62), 44 states have call predecessors, (62), 44 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-24 16:03:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 745 transitions. [2023-12-24 16:03:35,004 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 745 transitions. Word has length 156 [2023-12-24 16:03:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:03:35,004 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 745 transitions. [2023-12-24 16:03:35,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 6 states have call successors, (40), 5 states have call predecessors, (40), 6 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-12-24 16:03:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 745 transitions. [2023-12-24 16:03:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-24 16:03:35,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:03:35,006 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:03:35,011 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 (37)] Ended with exit code 0 [2023-12-24 16:03:35,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2023-12-24 16:03:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /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=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 16:03:35,407 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:03:35,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:03:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash -698471256, now seen corresponding path program 1 times [2023-12-24 16:03:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:03:35,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534132301] [2023-12-24 16:03:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:03:35,408 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 [2023-12-24 16:03:35,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:03:35,408 INFO L229 MonitoredProcess]: Starting monitored process 39 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) [2023-12-24 16:03:35,410 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 (39)] Waiting until timeout for monitored process [2023-12-24 16:03:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:03:35,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-24 16:03:35,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:03:35,682 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 [2023-12-24 16:03:36,190 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-12-24 16:03:36,191 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 1 case distinctions, treesize of input 30 treesize of output 33 [2023-12-24 16:03:36,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:03:36,533 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 45 treesize of output 37 [2023-12-24 16:03:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 16:03:36,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 16:03:36,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:03:36,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534132301] [2023-12-24 16:03:36,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534132301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 16:03:36,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 16:03:36,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-24 16:03:36,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543512129] [2023-12-24 16:03:36,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 16:03:36,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-24 16:03:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:03:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-24 16:03:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-24 16:03:36,659 INFO L87 Difference]: Start difference. First operand 621 states and 745 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:03:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:03:40,352 INFO L93 Difference]: Finished difference Result 1666 states and 2046 transitions. [2023-12-24 16:03:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-24 16:03:40,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 158 [2023-12-24 16:03:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:03:40,355 INFO L225 Difference]: With dead ends: 1666 [2023-12-24 16:03:40,355 INFO L226 Difference]: Without dead ends: 1173 [2023-12-24 16:03:40,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2023-12-24 16:03:40,357 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 500 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-24 16:03:40,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 1276 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-24 16:03:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2023-12-24 16:03:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 780. [2023-12-24 16:03:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 638 states have (on average 1.1943573667711598) internal successors, (762), 640 states have internal predecessors, (762), 82 states have call successors, (82), 59 states have call predecessors, (82), 59 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-12-24 16:03:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 926 transitions. [2023-12-24 16:03:40,730 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 926 transitions. Word has length 158 [2023-12-24 16:03:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:03:40,731 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 926 transitions. [2023-12-24 16:03:40,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:03:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 926 transitions. [2023-12-24 16:03:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-24 16:03:40,732 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:03:40,732 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:03:40,738 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 (39)] Forceful destruction successful, exit code 0 [2023-12-24 16:03:40,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /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 [2023-12-24 16:03:40,936 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:03:40,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:03:40,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1076536106, now seen corresponding path program 1 times [2023-12-24 16:03:40,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:03:40,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742148047] [2023-12-24 16:03:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:03:40,937 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 [2023-12-24 16:03:40,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:03:40,938 INFO L229 MonitoredProcess]: Starting monitored process 40 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) [2023-12-24 16:03:40,942 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 (40)] Waiting until timeout for monitored process [2023-12-24 16:03:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:03:41,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-24 16:03:41,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:03:43,439 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 25 treesize of output 13 [2023-12-24 16:03:43,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2023-12-24 16:03:43,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 16:03:44,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-24 16:03:45,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-24 16:03:47,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2023-12-24 16:03:47,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 16:03:47,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 27 [2023-12-24 16:03:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 32 proven. 528 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-24 16:03:48,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:03:49,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:03:49,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742148047] [2023-12-24 16:03:49,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742148047] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:03:49,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538263341] [2023-12-24 16:03:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:03:49,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 16:03:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 16:03:49,376 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 16:03:49,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2023-12-24 16:03:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:03:49,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-24 16:03:49,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:03:52,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-12-24 16:03:53,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-12-24 16:03:54,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2023-12-24 16:03:54,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2023-12-24 16:03:58,818 INFO L349 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2023-12-24 16:03:58,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 83 [2023-12-24 16:04:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 221 proven. 351 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-12-24 16:04:01,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:04:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-12-24 16:04:03,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [538263341] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 16:04:03,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-24 16:04:03,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 19] total 41 [2023-12-24 16:04:03,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916700103] [2023-12-24 16:04:03,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 16:04:03,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-24 16:04:03,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 16:04:03,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-24 16:04:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2111, Unknown=0, NotChecked=0, Total=2352 [2023-12-24 16:04:03,753 INFO L87 Difference]: Start difference. First operand 780 states and 926 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:04:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 16:04:11,943 INFO L93 Difference]: Finished difference Result 1951 states and 2350 transitions. [2023-12-24 16:04:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-24 16:04:11,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 158 [2023-12-24 16:04:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 16:04:11,949 INFO L225 Difference]: With dead ends: 1951 [2023-12-24 16:04:11,949 INFO L226 Difference]: Without dead ends: 1309 [2023-12-24 16:04:11,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 461 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=497, Invalid=4905, Unknown=0, NotChecked=0, Total=5402 [2023-12-24 16:04:11,951 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 303 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-24 16:04:11,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1070 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-24 16:04:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2023-12-24 16:04:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 848. [2023-12-24 16:04:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 706 states have (on average 1.1912181303116147) internal successors, (841), 708 states have internal predecessors, (841), 82 states have call successors, (82), 59 states have call predecessors, (82), 59 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-12-24 16:04:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1005 transitions. [2023-12-24 16:04:12,314 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1005 transitions. Word has length 158 [2023-12-24 16:04:12,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 16:04:12,315 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1005 transitions. [2023-12-24 16:04:12,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-24 16:04:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1005 transitions. [2023-12-24 16:04:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-24 16:04:12,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 16:04:12,316 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:04:12,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2023-12-24 16:04:12,530 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 (40)] Forceful destruction successful, exit code 0 [2023-12-24 16:04:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,40 /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 [2023-12-24 16:04:12,724 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 16:04:12,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 16:04:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -917608600, now seen corresponding path program 1 times [2023-12-24 16:04:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 16:04:12,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996745795] [2023-12-24 16:04:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:04:12,725 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 [2023-12-24 16:04:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 16:04:12,726 INFO L229 MonitoredProcess]: Starting monitored process 42 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) [2023-12-24 16:04:12,727 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 (42)] Waiting until timeout for monitored process [2023-12-24 16:04:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:04:13,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-24 16:04:13,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:04:13,147 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 [2023-12-24 16:04:15,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-24 16:04:16,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 16:04:16,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-24 16:04:18,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 32 [2023-12-24 16:04:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-24 16:04:18,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 16:04:20,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 16:04:20,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996745795] [2023-12-24 16:04:20,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996745795] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 16:04:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13892287] [2023-12-24 16:04:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 16:04:20,082 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 16:04:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 16:04:20,083 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 16:04:20,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2023-12-24 16:04:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 16:04:20,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-24 16:04:20,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 16:04:20,753 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 Received shutdown request... [2023-12-24 16:04:21,536 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 16:04:21,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-24 16:04:21,541 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 (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 16:04:21,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2023-12-24 16:04:21,558 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 [2023-12-24 16:04:21,746 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 (42)] Forceful destruction successful, exit code 0 [2023-12-24 16:04:21,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,42 /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 [2023-12-24 16:04:21,941 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 159 with TraceHistMax 20,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-8-1 term,while PolyPacSimplificationTermWalker was simplifying 8 xjuncts wrt. a ATOM-1 context. [2023-12-24 16:04:21,945 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 16:04:21,947 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-24 16:04:21,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.12 04:04:21 BoogieIcfgContainer [2023-12-24 16:04:21,949 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-24 16:04:21,949 INFO L158 Benchmark]: Toolchain (without parser) took 848374.38ms. Allocated memory was 213.9MB in the beginning and 463.5MB in the end (delta: 249.6MB). Free memory was 164.0MB in the beginning and 113.5MB in the end (delta: 50.5MB). Peak memory consumption was 300.9MB. Max. memory is 8.0GB. [2023-12-24 16:04:21,949 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 213.9MB. Free memory is still 165.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-24 16:04:21,949 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.51ms. Allocated memory is still 213.9MB. Free memory was 163.6MB in the beginning and 147.2MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-24 16:04:21,949 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.22ms. Allocated memory is still 213.9MB. Free memory was 147.2MB in the beginning and 143.7MB in the end (delta: 3.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-24 16:04:21,950 INFO L158 Benchmark]: Boogie Preprocessor took 67.61ms. Allocated memory is still 213.9MB. Free memory was 143.7MB in the beginning and 138.8MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2023-12-24 16:04:21,950 INFO L158 Benchmark]: RCFGBuilder took 785.70ms. Allocated memory was 213.9MB in the beginning and 385.9MB in the end (delta: 172.0MB). Free memory was 138.8MB in the beginning and 330.7MB in the end (delta: -191.9MB). Peak memory consumption was 25.5MB. Max. memory is 8.0GB. [2023-12-24 16:04:21,950 INFO L158 Benchmark]: TraceAbstraction took 847122.83ms. Allocated memory was 385.9MB in the beginning and 463.5MB in the end (delta: 77.6MB). Free memory was 329.7MB in the beginning and 113.5MB in the end (delta: 216.1MB). Peak memory consumption was 294.3MB. Max. memory is 8.0GB. [2023-12-24 16:04:21,951 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 213.9MB. Free memory is still 165.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 336.51ms. Allocated memory is still 213.9MB. Free memory was 163.6MB in the beginning and 147.2MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 51.22ms. Allocated memory is still 213.9MB. Free memory was 147.2MB in the beginning and 143.7MB in the end (delta: 3.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 67.61ms. Allocated memory is still 213.9MB. Free memory was 143.7MB in the beginning and 138.8MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * RCFGBuilder took 785.70ms. Allocated memory was 213.9MB in the beginning and 385.9MB in the end (delta: 172.0MB). Free memory was 138.8MB in the beginning and 330.7MB in the end (delta: -191.9MB). Peak memory consumption was 25.5MB. Max. memory is 8.0GB. * TraceAbstraction took 847122.83ms. Allocated memory was 385.9MB in the beginning and 463.5MB in the end (delta: 77.6MB). Free memory was 329.7MB in the beginning and 113.5MB in the end (delta: 216.1MB). Peak memory consumption was 294.3MB. 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: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was analyzing trace of length 159 with TraceHistMax 20,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-8-1 term,while PolyPacSimplificationTermWalker was simplifying 8 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 104 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 847.1s, OverallIterations: 27, TraceHistogramMax: 20, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 413.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 18927 SdHoareTripleChecker+Valid, 119.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18921 mSDsluCounter, 42702 SdHoareTripleChecker+Invalid, 113.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 38432 mSDsCounter, 4045 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27385 IncrementalHoareTripleChecker+Invalid, 31433 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4045 mSolverCounterUnsat, 4270 mSDtfsCounter, 27385 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8622 GetRequests, 7489 SyntacticMatches, 17 SemanticMatches, 1116 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 22856 ImplicationChecksByTransitivity, 485.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=848occurred in iteration=26, InterpolantAutomatonStates: 606, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.9s AutomataMinimizationTime, 26 MinimizatonAttempts, 5894 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 398.9s InterpolantComputationTime, 6152 NumberOfCodeBlocks, 6152 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 6731 ConstructedInterpolants, 2293 QuantifiedInterpolants, 183582 SizeOfPredicates, 685 NumberOfNonLiveVariables, 13731 ConjunctsInSsa, 1110 ConjunctsInUnsatCore, 44 InterpolantComputations, 14 PerfectInterpolantSequences, 23269/33440 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