/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-27.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-24 14:42:21,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-24 14:42:21,793 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 14:42:21,797 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-24 14:42:21,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-24 14:42:21,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-24 14:42:21,828 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-24 14:42:21,828 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-24 14:42:21,829 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-24 14:42:21,829 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-24 14:42:21,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-24 14:42:21,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-24 14:42:21,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-24 14:42:21,831 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-24 14:42:21,831 INFO L153 SettingsManager]: * Use SBE=true [2023-12-24 14:42:21,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-24 14:42:21,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-24 14:42:21,832 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-24 14:42:21,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-24 14:42:21,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-24 14:42:21,833 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-24 14:42:21,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-24 14:42:21,834 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-24 14:42:21,835 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-24 14:42:21,835 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-24 14:42:21,835 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-24 14:42:21,835 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-24 14:42:21,836 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-24 14:42:21,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-24 14:42:21,836 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-24 14:42:21,837 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-24 14:42:21,837 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-24 14:42:21,837 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-24 14:42:21,837 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-24 14:42:21,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 14:42:21,838 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-24 14:42:21,838 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-24 14:42:21,838 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-24 14:42:21,838 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-24 14:42:21,839 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-24 14:42:21,839 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-24 14:42:21,840 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-24 14:42:21,840 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-24 14:42:21,840 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-24 14:42:21,840 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-24 14:42:21,840 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-24 14:42:21,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-24 14:42:22,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-24 14:42:22,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-24 14:42:22,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-24 14:42:22,104 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-24 14:42:22,104 INFO L274 PluginConnector]: CDTParser initialized [2023-12-24 14:42:22,106 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-27.i [2023-12-24 14:42:23,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-24 14:42:23,455 INFO L384 CDTParser]: Found 1 translation units. [2023-12-24 14:42:23,455 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-27.i [2023-12-24 14:42:23,464 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05fd80ed1/5949adf1ec7142fc8c93c8cb8ecd75de/FLAG7d0556a68 [2023-12-24 14:42:23,475 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05fd80ed1/5949adf1ec7142fc8c93c8cb8ecd75de [2023-12-24 14:42:23,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-24 14:42:23,479 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-24 14:42:23,480 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-24 14:42:23,480 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-24 14:42:23,484 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-24 14:42:23,484 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,485 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35318077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23, skipping insertion in model container [2023-12-24 14:42:23,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,520 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-24 14:42:23,657 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-27.i[917,930] [2023-12-24 14:42:23,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 14:42:23,737 INFO L202 MainTranslator]: Completed pre-run [2023-12-24 14:42:23,747 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-27.i[917,930] [2023-12-24 14:42:23,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 14:42:23,793 INFO L206 MainTranslator]: Completed translation [2023-12-24 14:42:23,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23 WrapperNode [2023-12-24 14:42:23,794 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-24 14:42:23,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-24 14:42:23,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-24 14:42:23,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-24 14:42:23,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,847 INFO L138 Inliner]: procedures = 30, calls = 155, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 441 [2023-12-24 14:42:23,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-24 14:42:23,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-24 14:42:23,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-24 14:42:23,848 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-24 14:42:23,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,889 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,915 INFO L175 MemorySlicer]: Split 123 memory accesses to 5 slices as follows [2, 16, 70, 11, 24]. 57 percent of accesses are in the largest equivalence class. The 14 initializations are split as follows [2, 2, 6, 1, 3]. The 16 writes are split as follows [0, 2, 8, 1, 5]. [2023-12-24 14:42:23,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,915 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,931 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,938 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,940 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,945 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-24 14:42:23,946 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-24 14:42:23,946 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-24 14:42:23,946 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-24 14:42:23,948 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (1/1) ... [2023-12-24 14:42:23,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 14:42:23,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-24 14:42:23,980 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 14:42:23,993 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 14:42:24,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-24 14:42:24,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2023-12-24 14:42:24,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2023-12-24 14:42:24,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2023-12-24 14:42:24,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2023-12-24 14:42:24,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#4 [2023-12-24 14:42:24,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-24 14:42:24,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-24 14:42:24,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-12-24 14:42:24,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-12-24 14:42:24,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-12-24 14:42:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2023-12-24 14:42:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2023-12-24 14:42:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2023-12-24 14:42:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2023-12-24 14:42:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2023-12-24 14:42:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-12-24 14:42:24,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-12-24 14:42:24,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-12-24 14:42:24,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-12-24 14:42:24,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-12-24 14:42:24,011 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-24 14:42:24,012 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-24 14:42:24,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-24 14:42:24,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-24 14:42:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2023-12-24 14:42:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2023-12-24 14:42:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2023-12-24 14:42:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2023-12-24 14:42:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#4 [2023-12-24 14:42:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-12-24 14:42:24,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-12-24 14:42:24,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-12-24 14:42:24,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-12-24 14:42:24,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-12-24 14:42:24,142 INFO L241 CfgBuilder]: Building ICFG [2023-12-24 14:42:24,143 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-24 14:42:24,636 INFO L282 CfgBuilder]: Performing block encoding [2023-12-24 14:42:24,669 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-24 14:42:24,669 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-24 14:42:24,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:42:24 BoogieIcfgContainer [2023-12-24 14:42:24,670 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-24 14:42:24,671 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-24 14:42:24,672 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-24 14:42:24,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-24 14:42:24,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.12 02:42:23" (1/3) ... [2023-12-24 14:42:24,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fa04f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 02:42:24, skipping insertion in model container [2023-12-24 14:42:24,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 02:42:23" (2/3) ... [2023-12-24 14:42:24,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fa04f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 02:42:24, skipping insertion in model container [2023-12-24 14:42:24,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:42:24" (3/3) ... [2023-12-24 14:42:24,676 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-ap_file-27.i [2023-12-24 14:42:24,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-24 14:42:24,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-24 14:42:24,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-24 14:42:24,733 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;@614b54b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-24 14:42:24,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-24 14:42:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 68 states have internal predecessors, (95), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-24 14:42:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-24 14:42:24,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:42:24,751 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:24,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:42:24,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:42:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1954445179, now seen corresponding path program 1 times [2023-12-24 14:42:24,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:42:24,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133406263] [2023-12-24 14:42:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:24,773 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 14:42:24,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:42:24,775 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 14:42:24,776 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 14:42:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:25,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-24 14:42:25,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2023-12-24 14:42:25,063 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 14:42:25,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:42:25,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133406263] [2023-12-24 14:42:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133406263] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 14:42:25,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 14:42:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-24 14:42:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065349658] [2023-12-24 14:42:25,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 14:42:25,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-24 14:42:25,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:42:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-24 14:42:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 14:42:25,104 INFO L87 Difference]: Start difference. First operand has 87 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 68 states have internal predecessors, (95), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-24 14:42:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:42:25,168 INFO L93 Difference]: Finished difference Result 171 states and 273 transitions. [2023-12-24 14:42:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-24 14:42:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 126 [2023-12-24 14:42:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:42:25,177 INFO L225 Difference]: With dead ends: 171 [2023-12-24 14:42:25,177 INFO L226 Difference]: Without dead ends: 85 [2023-12-24 14:42:25,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 125 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 14:42:25,183 INFO L413 NwaCegarLoop]: 120 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, 120 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 14:42:25,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 14:42:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-24 14:42:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-12-24 14:42:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-24 14:42:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 124 transitions. [2023-12-24 14:42:25,224 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 124 transitions. Word has length 126 [2023-12-24 14:42:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:42:25,225 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 124 transitions. [2023-12-24 14:42:25,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-24 14:42:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 124 transitions. [2023-12-24 14:42:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-24 14:42:25,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:42:25,228 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:25,237 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 14:42:25,429 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 14:42:25,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:42:25,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:42:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2107448995, now seen corresponding path program 1 times [2023-12-24 14:42:25,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:42:25,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728467342] [2023-12-24 14:42:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:25,434 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 14:42:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:42:25,435 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 14:42:25,467 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 14:42:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:25,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-24 14:42:25,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-24 14:42:26,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:42:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-12-24 14:42:26,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:42:26,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728467342] [2023-12-24 14:42:26,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728467342] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 14:42:26,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-24 14:42:26,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2023-12-24 14:42:26,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957471666] [2023-12-24 14:42:26,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 14:42:26,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-24 14:42:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:42:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-24 14:42:26,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-24 14:42:26,261 INFO L87 Difference]: Start difference. First operand 85 states and 124 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:42:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:42:26,365 INFO L93 Difference]: Finished difference Result 214 states and 314 transitions. [2023-12-24 14:42:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-24 14:42:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 126 [2023-12-24 14:42:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:42:26,367 INFO L225 Difference]: With dead ends: 214 [2023-12-24 14:42:26,367 INFO L226 Difference]: Without dead ends: 130 [2023-12-24 14:42:26,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-12-24 14:42:26,369 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 64 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 14:42:26,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 433 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 14:42:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-24 14:42:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 89. [2023-12-24 14:42:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 70 states have internal predecessors, (96), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-24 14:42:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2023-12-24 14:42:26,381 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 126 [2023-12-24 14:42:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:42:26,382 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2023-12-24 14:42:26,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:42:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2023-12-24 14:42:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-24 14:42:26,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:42:26,385 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:26,396 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 14:42:26,590 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 14:42:26,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:42:26,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:42:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 113304289, now seen corresponding path program 1 times [2023-12-24 14:42:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:42:26,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655732027] [2023-12-24 14:42:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:26,593 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 14:42:26,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:42:26,596 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 14:42:26,596 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 14:42:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:26,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-24 14:42:26,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:27,163 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 14:42:27,303 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 14:42:27,430 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 14:42:27,557 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 14:42:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-24 14:42:27,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:42:27,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:42:27,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655732027] [2023-12-24 14:42:27,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655732027] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:42:27,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551089763] [2023-12-24 14:42:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:27,894 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:42:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:42:27,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 14:42:27,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-12-24 14:42:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:28,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-24 14:42:28,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:29,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:42:29,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:42:29,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 14:42:30,502 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 22 treesize of output 25 [2023-12-24 14:42:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-24 14:42:30,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:42:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551089763] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:42:35,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:42:35,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2023-12-24 14:42:35,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278859651] [2023-12-24 14:42:35,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:42:35,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-24 14:42:35,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:42:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-24 14:42:35,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2023-12-24 14:42:35,691 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2023-12-24 14:42:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:42:36,914 INFO L93 Difference]: Finished difference Result 337 states and 492 transitions. [2023-12-24 14:42:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-24 14:42:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 126 [2023-12-24 14:42:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:42:36,919 INFO L225 Difference]: With dead ends: 337 [2023-12-24 14:42:36,919 INFO L226 Difference]: Without dead ends: 249 [2023-12-24 14:42:36,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=136, Invalid=463, Unknown=1, NotChecked=0, Total=600 [2023-12-24 14:42:36,921 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 412 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-24 14:42:36,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 759 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-24 14:42:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-12-24 14:42:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 223. [2023-12-24 14:42:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 179 states have (on average 1.3743016759776536) internal successors, (246), 180 states have internal predecessors, (246), 40 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-24 14:42:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 326 transitions. [2023-12-24 14:42:36,984 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 326 transitions. Word has length 126 [2023-12-24 14:42:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:42:36,984 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 326 transitions. [2023-12-24 14:42:36,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 9 states have internal predecessors, (87), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2023-12-24 14:42:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 326 transitions. [2023-12-24 14:42:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-24 14:42:36,988 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:42:36,989 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:36,998 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 14:42:37,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-12-24 14:42:37,389 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=3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 14:42:37,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:42:37,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:42:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1597776678, now seen corresponding path program 1 times [2023-12-24 14:42:37,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:42:37,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898368737] [2023-12-24 14:42:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:37,391 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 14:42:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:42:37,392 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 14:42:37,394 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 14:42:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:37,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-24 14:42:37,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:38,002 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 14:42:38,158 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 14:42:38,356 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 14:42:38,522 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 14:42:38,930 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 14:42:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-24 14:42:38,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:42:39,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:42:39,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898368737] [2023-12-24 14:42:39,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898368737] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:42:39,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [451354824] [2023-12-24 14:42:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:39,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:42:39,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:42:39,045 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 14:42:39,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-24 14:42:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:39,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-24 14:42:39,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:39,731 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 14:42:39,917 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 14:42:40,107 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 14:42:40,306 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 14:42:40,808 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 14:42:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-24 14:42:40,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:42:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [451354824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:42:40,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:42:40,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-24 14:42:40,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173468249] [2023-12-24 14:42:40,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:42:40,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-24 14:42:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:42:40,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-24 14:42:40,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-24 14:42:40,920 INFO L87 Difference]: Start difference. First operand 223 states and 326 transitions. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2023-12-24 14:42:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:42:41,259 INFO L93 Difference]: Finished difference Result 449 states and 655 transitions. [2023-12-24 14:42:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-24 14:42:41,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 128 [2023-12-24 14:42:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:42:41,262 INFO L225 Difference]: With dead ends: 449 [2023-12-24 14:42:41,263 INFO L226 Difference]: Without dead ends: 227 [2023-12-24 14:42:41,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-12-24 14:42:41,265 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 240 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-24 14:42:41,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 493 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-24 14:42:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-24 14:42:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2023-12-24 14:42:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 179 states have (on average 1.3687150837988826) internal successors, (245), 180 states have internal predecessors, (245), 40 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-24 14:42:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 325 transitions. [2023-12-24 14:42:41,291 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 325 transitions. Word has length 128 [2023-12-24 14:42:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:42:41,292 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 325 transitions. [2023-12-24 14:42:41,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2023-12-24 14:42:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 325 transitions. [2023-12-24 14:42:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-24 14:42:41,294 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:42:41,294 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:41,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-12-24 14:42:41,502 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 14:42:41,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 14:42:41,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:42:41,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:42:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1169562966, now seen corresponding path program 1 times [2023-12-24 14:42:41,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:42:41,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284798854] [2023-12-24 14:42:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:41,700 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 14:42:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:42:41,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 14:42:41,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-24 14:42:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:41,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-24 14:42:41,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:42,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-24 14:42:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-24 14:42:42,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:42:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-12-24 14:42:42,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:42:42,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284798854] [2023-12-24 14:42:42,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284798854] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 14:42:42,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-24 14:42:42,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-12-24 14:42:42,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322716353] [2023-12-24 14:42:42,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 14:42:42,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-24 14:42:42,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:42:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-24 14:42:42,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-24 14:42:42,326 INFO L87 Difference]: Start difference. First operand 223 states and 325 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:42:42,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:42:42,411 INFO L93 Difference]: Finished difference Result 564 states and 823 transitions. [2023-12-24 14:42:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-24 14:42:42,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 128 [2023-12-24 14:42:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:42:42,413 INFO L225 Difference]: With dead ends: 564 [2023-12-24 14:42:42,413 INFO L226 Difference]: Without dead ends: 342 [2023-12-24 14:42:42,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-12-24 14:42:42,415 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 114 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 14:42:42,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 434 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 14:42:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-12-24 14:42:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 251. [2023-12-24 14:42:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 207 states have (on average 1.3623188405797102) internal successors, (282), 208 states have internal predecessors, (282), 40 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-24 14:42:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 362 transitions. [2023-12-24 14:42:42,438 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 362 transitions. Word has length 128 [2023-12-24 14:42:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:42:42,438 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 362 transitions. [2023-12-24 14:42:42,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:42:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 362 transitions. [2023-12-24 14:42:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-24 14:42:42,440 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:42:42,440 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:42,449 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 (8)] Ended with exit code 0 [2023-12-24 14:42:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 14:42:42,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:42:42,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:42:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1912820860, now seen corresponding path program 1 times [2023-12-24 14:42:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:42:42,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922221376] [2023-12-24 14:42:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:42,647 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 14:42:42,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:42:42,649 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 14:42:42,649 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 14:42:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:42,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-24 14:42:42,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:43,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-24 14:42:44,342 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 14 [2023-12-24 14:42:45,185 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 44 treesize of output 27 [2023-12-24 14:42:46,673 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 36 [2023-12-24 14:42:46,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:42:46,969 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 85 treesize of output 51 [2023-12-24 14:42:47,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:42:47,295 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 77 treesize of output 33 [2023-12-24 14:42:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 114 proven. 280 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-12-24 14:42:47,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:42:47,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:42:47,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922221376] [2023-12-24 14:42:47,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922221376] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:42:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1631486653] [2023-12-24 14:42:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:47,899 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:42:47,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:42:47,900 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 14:42:47,901 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 14:42:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:48,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-24 14:42:48,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:48,931 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 15 treesize of output 1 [2023-12-24 14:42:48,993 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 14:42:49,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-24 14:42:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-12-24 14:42:49,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 14:42:49,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1631486653] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 14:42:49,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-24 14:42:49,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [25] total 29 [2023-12-24 14:42:49,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848667953] [2023-12-24 14:42:49,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 14:42:49,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-24 14:42:49,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:42:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-24 14:42:49,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2023-12-24 14:42:49,075 INFO L87 Difference]: Start difference. First operand 251 states and 362 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:42:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:42:49,440 INFO L93 Difference]: Finished difference Result 429 states and 616 transitions. [2023-12-24 14:42:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-24 14:42:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 129 [2023-12-24 14:42:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:42:49,444 INFO L225 Difference]: With dead ends: 429 [2023-12-24 14:42:49,444 INFO L226 Difference]: Without dead ends: 274 [2023-12-24 14:42:49,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2023-12-24 14:42:49,446 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 216 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-24 14:42:49,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 376 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-24 14:42:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-12-24 14:42:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 251. [2023-12-24 14:42:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 206 states have (on average 1.3495145631067962) internal successors, (278), 207 states have internal predecessors, (278), 40 states have call successors, (40), 4 states have call predecessors, (40), 4 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-24 14:42:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 358 transitions. [2023-12-24 14:42:49,468 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 358 transitions. Word has length 129 [2023-12-24 14:42:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:42:49,468 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 358 transitions. [2023-12-24 14:42:49,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:42:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 358 transitions. [2023-12-24 14:42:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-24 14:42:49,470 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:42:49,470 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:49,477 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 14:42:49,681 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 14:42:49,877 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 14:42:49,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:42:49,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:42:49,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1336855164, now seen corresponding path program 1 times [2023-12-24 14:42:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:42:49,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569189520] [2023-12-24 14:42:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:49,878 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 14:42:49,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:42:49,879 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 14:42:49,880 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 (11)] Waiting until timeout for monitored process [2023-12-24 14:42:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:50,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-24 14:42:50,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:50,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:42:51,548 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 14 [2023-12-24 14:42:52,387 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 44 treesize of output 27 [2023-12-24 14:42:53,866 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 36 [2023-12-24 14:42:54,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:42:54,129 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 68 treesize of output 42 [2023-12-24 14:42:54,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:42:54,266 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 60 treesize of output 24 [2023-12-24 14:42:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 114 proven. 280 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-12-24 14:42:54,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:42:54,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:42:54,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569189520] [2023-12-24 14:42:54,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569189520] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:42:54,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614348654] [2023-12-24 14:42:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:42:54,900 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:42:54,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:42:54,901 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 14:42:54,912 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 14:42:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:42:55,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-24 14:42:55,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:42:56,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:42:57,198 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 14 [2023-12-24 14:42:58,392 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 44 treesize of output 27 [2023-12-24 14:42:59,939 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 36 [2023-12-24 14:43:00,348 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 68 treesize of output 42 [2023-12-24 14:43:00,565 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 66 treesize of output 26 [2023-12-24 14:43:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 114 proven. 280 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-12-24 14:43:00,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:43:00,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614348654] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:43:00,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:43:00,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-12-24 14:43:00,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052123296] [2023-12-24 14:43:00,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:43:00,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-24 14:43:00,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:43:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-24 14:43:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2914, Unknown=0, NotChecked=0, Total=3422 [2023-12-24 14:43:00,793 INFO L87 Difference]: Start difference. First operand 251 states and 358 transitions. Second operand has 51 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 42 states have internal predecessors, (114), 12 states have call successors, (34), 10 states have call predecessors, (34), 12 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2023-12-24 14:43:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:43:05,872 INFO L93 Difference]: Finished difference Result 570 states and 778 transitions. [2023-12-24 14:43:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-24 14:43:05,873 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 42 states have internal predecessors, (114), 12 states have call successors, (34), 10 states have call predecessors, (34), 12 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) Word has length 129 [2023-12-24 14:43:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:43:05,875 INFO L225 Difference]: With dead ends: 570 [2023-12-24 14:43:05,875 INFO L226 Difference]: Without dead ends: 415 [2023-12-24 14:43:05,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1171, Invalid=5635, Unknown=0, NotChecked=0, Total=6806 [2023-12-24 14:43:05,890 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 613 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 3136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-24 14:43:05,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 2447 Invalid, 3136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-24 14:43:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-12-24 14:43:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 345. [2023-12-24 14:43:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 285 states have (on average 1.3263157894736841) internal successors, (378), 287 states have internal predecessors, (378), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-24 14:43:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 470 transitions. [2023-12-24 14:43:05,934 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 470 transitions. Word has length 129 [2023-12-24 14:43:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:43:05,935 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 470 transitions. [2023-12-24 14:43:05,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 42 states have internal predecessors, (114), 12 states have call successors, (34), 10 states have call predecessors, (34), 12 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2023-12-24 14:43:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 470 transitions. [2023-12-24 14:43:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-24 14:43:05,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:43:05,938 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:05,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-12-24 14:43:06,148 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 14:43:06,344 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 14:43:06,345 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:43:06,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:43:06,345 INFO L85 PathProgramCache]: Analyzing trace with hash 914153338, now seen corresponding path program 1 times [2023-12-24 14:43:06,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:43:06,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134085697] [2023-12-24 14:43:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:43:06,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 14:43:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:43:06,347 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 14:43:06,348 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 14:43:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:43:06,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-24 14:43:06,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:43:06,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:43:06,832 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 14:43:06,908 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 14:43:07,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-24 14:43:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 93 proven. 289 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-12-24 14:43:07,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:43:07,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:43:07,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134085697] [2023-12-24 14:43:07,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134085697] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:43:07,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974544366] [2023-12-24 14:43:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:43:07,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:43:07,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:43:07,155 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 14:43:07,156 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 14:43:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:43:07,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-24 14:43:07,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:43:07,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 14:43:07,882 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 14:43:07,978 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 14:43:08,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-24 14:43:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 93 proven. 289 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-12-24 14:43:08,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:43:08,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [974544366] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:43:08,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:43:08,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-24 14:43:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852056203] [2023-12-24 14:43:08,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:43:08,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-24 14:43:08,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:43:08,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-24 14:43:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-12-24 14:43:08,244 INFO L87 Difference]: Start difference. First operand 345 states and 470 transitions. Second operand has 15 states, 13 states have (on average 7.0) internal successors, (91), 14 states have internal predecessors, (91), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 6 states have call predecessors, (34), 8 states have call successors, (34) [2023-12-24 14:43:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:43:08,740 INFO L93 Difference]: Finished difference Result 613 states and 831 transitions. [2023-12-24 14:43:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-24 14:43:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 7.0) internal successors, (91), 14 states have internal predecessors, (91), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 6 states have call predecessors, (34), 8 states have call successors, (34) Word has length 129 [2023-12-24 14:43:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:43:08,745 INFO L225 Difference]: With dead ends: 613 [2023-12-24 14:43:08,745 INFO L226 Difference]: Without dead ends: 380 [2023-12-24 14:43:08,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2023-12-24 14:43:08,746 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 224 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-24 14:43:08,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 385 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-24 14:43:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-12-24 14:43:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 322. [2023-12-24 14:43:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 261 states have (on average 1.2988505747126438) internal successors, (339), 263 states have internal predecessors, (339), 46 states have call successors, (46), 14 states have call predecessors, (46), 14 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-24 14:43:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 431 transitions. [2023-12-24 14:43:08,776 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 431 transitions. Word has length 129 [2023-12-24 14:43:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:43:08,776 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 431 transitions. [2023-12-24 14:43:08,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 7.0) internal successors, (91), 14 states have internal predecessors, (91), 8 states have call successors, (34), 6 states have call predecessors, (34), 8 states have return successors, (34), 6 states have call predecessors, (34), 8 states have call successors, (34) [2023-12-24 14:43:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 431 transitions. [2023-12-24 14:43:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-24 14:43:08,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:43:08,778 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:08,787 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 14:43:08,987 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 (13)] Ended with exit code 0 [2023-12-24 14:43:09,183 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 14:43:09,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:43:09,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:43:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash 949942518, now seen corresponding path program 1 times [2023-12-24 14:43:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:43:09,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252353860] [2023-12-24 14:43:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:43:09,184 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 14:43:09,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:43:09,186 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 14:43:09,186 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 14:43:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:43:09,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-24 14:43:09,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:43:09,912 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 14:43:09,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-24 14:43:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-12-24 14:43:09,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 14:43:09,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:43:09,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252353860] [2023-12-24 14:43:09,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252353860] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 14:43:09,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 14:43:09,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-24 14:43:09,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771946013] [2023-12-24 14:43:09,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 14:43:09,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-24 14:43:09,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:43:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-24 14:43:09,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-24 14:43:09,943 INFO L87 Difference]: Start difference. First operand 322 states and 431 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:43:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:43:10,232 INFO L93 Difference]: Finished difference Result 530 states and 701 transitions. [2023-12-24 14:43:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-24 14:43:10,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 129 [2023-12-24 14:43:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:43:10,234 INFO L225 Difference]: With dead ends: 530 [2023-12-24 14:43:10,234 INFO L226 Difference]: Without dead ends: 336 [2023-12-24 14:43:10,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-24 14:43:10,235 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 206 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-24 14:43:10,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 304 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-24 14:43:10,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-12-24 14:43:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 274. [2023-12-24 14:43:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 218 states have (on average 1.2660550458715596) internal successors, (276), 219 states have internal predecessors, (276), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-24 14:43:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2023-12-24 14:43:10,263 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 129 [2023-12-24 14:43:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:43:10,263 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2023-12-24 14:43:10,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:43:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2023-12-24 14:43:10,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-24 14:43:10,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:43:10,265 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:10,274 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 (15)] Forceful destruction successful, exit code 0 [2023-12-24 14:43:10,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 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 14:43:10,472 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:43:10,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:43:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1472401365, now seen corresponding path program 1 times [2023-12-24 14:43:10,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:43:10,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510532076] [2023-12-24 14:43:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:43:10,473 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 14:43:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:43:10,474 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 14:43:10,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-24 14:43:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:43:10,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-24 14:43:10,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:43:11,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-24 14:43:12,294 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 14:43:13,178 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 37 treesize of output 24 [2023-12-24 14:43:14,385 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 51 treesize of output 37 [2023-12-24 14:43:17,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2023-12-24 14:43:19,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:43:19,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 137 treesize of output 53 [2023-12-24 14:43:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 193 proven. 282 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-24 14:43:19,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:43:49,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:43:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510532076] [2023-12-24 14:43:49,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510532076] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:43:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [79815056] [2023-12-24 14:43:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:43:49,090 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:43:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:43:49,091 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 14:43:49,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-24 14:43:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:43:49,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-24 14:43:49,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:43:50,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 14:43:52,367 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 14 [2023-12-24 14:43:54,415 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 44 treesize of output 27 [2023-12-24 14:43:59,034 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 51 [2023-12-24 14:44:01,786 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 112 treesize of output 44 [2023-12-24 14:44:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 159 proven. 279 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-24 14:44:02,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:45:15,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [79815056] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:45:15,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:45:15,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 36] total 73 [2023-12-24 14:45:15,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280349010] [2023-12-24 14:45:15,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:45:15,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-24 14:45:15,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:45:15,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-24 14:45:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1905, Invalid=9648, Unknown=3, NotChecked=0, Total=11556 [2023-12-24 14:45:15,360 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand has 74 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 61 states have internal predecessors, (135), 18 states have call successors, (34), 15 states have call predecessors, (34), 18 states have return successors, (34), 15 states have call predecessors, (34), 18 states have call successors, (34) [2023-12-24 14:45:39,064 WARN L293 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 145 DAG size of output: 82 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 14:45:53,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:45:57,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:45:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:45:59,125 INFO L93 Difference]: Finished difference Result 1013 states and 1309 transitions. [2023-12-24 14:45:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-12-24 14:45:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 61 states have internal predecessors, (135), 18 states have call successors, (34), 15 states have call predecessors, (34), 18 states have return successors, (34), 15 states have call predecessors, (34), 18 states have call successors, (34) Word has length 130 [2023-12-24 14:45:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:45:59,130 INFO L225 Difference]: With dead ends: 1013 [2023-12-24 14:45:59,130 INFO L226 Difference]: Without dead ends: 756 [2023-12-24 14:45:59,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11575 ImplicationChecksByTransitivity, 135.8s TimeCoverageRelationStatistics Valid=5864, Invalid=28173, Unknown=3, NotChecked=0, Total=34040 [2023-12-24 14:45:59,139 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 2421 mSDsluCounter, 3290 mSDsCounter, 0 mSdLazyCounter, 4431 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2421 SdHoareTripleChecker+Valid, 3395 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 4431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-12-24 14:45:59,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2421 Valid, 3395 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 4431 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2023-12-24 14:45:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-12-24 14:45:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 340. [2023-12-24 14:45:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 277 states have (on average 1.259927797833935) internal successors, (349), 278 states have internal predecessors, (349), 40 states have call successors, (40), 22 states have call predecessors, (40), 22 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-24 14:45:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 429 transitions. [2023-12-24 14:45:59,194 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 429 transitions. Word has length 130 [2023-12-24 14:45:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:45:59,194 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 429 transitions. [2023-12-24 14:45:59,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 61 states have internal predecessors, (135), 18 states have call successors, (34), 15 states have call predecessors, (34), 18 states have return successors, (34), 15 states have call predecessors, (34), 18 states have call successors, (34) [2023-12-24 14:45:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 429 transitions. [2023-12-24 14:45:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-24 14:45:59,196 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:45:59,196 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:59,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-12-24 14:45:59,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2023-12-24 14:45:59,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 14:45:59,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:45:59,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:45:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash -771336787, now seen corresponding path program 1 times [2023-12-24 14:45:59,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:45:59,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985869277] [2023-12-24 14:45:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:45:59,603 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 14:45:59,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:45:59,604 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 14:45:59,605 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 14:45:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:45:59,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-24 14:45:59,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:46:00,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:46:01,532 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 14 [2023-12-24 14:46:02,033 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 14 [2023-12-24 14:46:02,570 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 14 [2023-12-24 14:46:04,464 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 48 treesize of output 34 [2023-12-24 14:46:04,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:46:04,767 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 22 [2023-12-24 14:46:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 104 proven. 304 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-24 14:46:04,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:46:09,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:46:09,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985869277] [2023-12-24 14:46:09,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985869277] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:46:09,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [349463808] [2023-12-24 14:46:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:46:09,734 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:46:09,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:46:09,735 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 14:46:09,736 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 14:46:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:46:10,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-24 14:46:10,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:46:11,456 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 23 treesize of output 11 [2023-12-24 14:46:12,937 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 37 treesize of output 24 [2023-12-24 14:46:14,779 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 30 [2023-12-24 14:46:17,079 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 58 treesize of output 40 [2023-12-24 14:46:20,380 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 43 [2023-12-24 14:46:20,929 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 31 [2023-12-24 14:46:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 88 proven. 344 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-24 14:46:21,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:46:25,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [349463808] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:46:25,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:46:25,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 32] total 46 [2023-12-24 14:46:25,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888829615] [2023-12-24 14:46:25,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:46:25,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-24 14:46:25,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:46:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-24 14:46:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2287, Unknown=0, NotChecked=0, Total=2652 [2023-12-24 14:46:25,744 INFO L87 Difference]: Start difference. First operand 340 states and 429 transitions. Second operand has 47 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 states have internal predecessors, (119), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2023-12-24 14:46:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:46:36,921 INFO L93 Difference]: Finished difference Result 1041 states and 1329 transitions. [2023-12-24 14:46:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-24 14:46:36,922 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 states have internal predecessors, (119), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 130 [2023-12-24 14:46:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:46:36,928 INFO L225 Difference]: With dead ends: 1041 [2023-12-24 14:46:36,928 INFO L226 Difference]: Without dead ends: 722 [2023-12-24 14:46:36,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1085, Invalid=7105, Unknown=0, NotChecked=0, Total=8190 [2023-12-24 14:46:36,931 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1182 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-24 14:46:36,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 1819 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-24 14:46:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2023-12-24 14:46:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 342. [2023-12-24 14:46:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 287 states have (on average 1.2682926829268293) internal successors, (364), 287 states have internal predecessors, (364), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-24 14:46:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 432 transitions. [2023-12-24 14:46:36,981 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 432 transitions. Word has length 130 [2023-12-24 14:46:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:46:36,981 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 432 transitions. [2023-12-24 14:46:36,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 states have internal predecessors, (119), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2023-12-24 14:46:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 432 transitions. [2023-12-24 14:46:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-24 14:46:36,983 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:46:36,983 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:46:36,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2023-12-24 14:46:37,201 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 14:46:37,398 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 14:46:37,398 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:46:37,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:46:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1801497577, now seen corresponding path program 1 times [2023-12-24 14:46:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:46:37,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568701501] [2023-12-24 14:46:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:46:37,399 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 14:46:37,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:46:37,400 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 14:46:37,401 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 14:46:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:46:37,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-24 14:46:37,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:46:39,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:46:39,936 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 14 [2023-12-24 14:46:41,271 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 44 treesize of output 27 [2023-12-24 14:46:44,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 51 [2023-12-24 14:46:53,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:46:53,312 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 145 treesize of output 61 [2023-12-24 14:46:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 159 proven. 279 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-24 14:46:53,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:47:57,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:47:57,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568701501] [2023-12-24 14:47:57,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568701501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:47:57,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147154710] [2023-12-24 14:47:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:47:57,991 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:47:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:47:57,993 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 14:47:57,993 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 14:47:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:47:58,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-24 14:47:58,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:47:59,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:48:01,854 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 14 [2023-12-24 14:48:04,202 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 44 treesize of output 27 [2023-12-24 14:48:09,711 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 51 [2023-12-24 14:48:31,408 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 145 treesize of output 61 [2023-12-24 14:48:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 159 proven. 279 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-24 14:48:32,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:49:01,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1147154710] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:49:01,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:49:01,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 68 [2023-12-24 14:49:01,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727629976] [2023-12-24 14:49:01,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:49:01,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-12-24 14:49:01,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:49:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-12-24 14:49:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1170, Invalid=6306, Unknown=6, NotChecked=0, Total=7482 [2023-12-24 14:49:01,826 INFO L87 Difference]: Start difference. First operand 342 states and 432 transitions. Second operand has 69 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 16 states have call successors, (34), 14 states have call predecessors, (34), 16 states have return successors, (34), 14 states have call predecessors, (34), 16 states have call successors, (34) [2023-12-24 14:49:34,012 WARN L293 SmtUtils]: Spent 9.69s on a formula simplification. DAG size of input: 106 DAG size of output: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 14:49:44,534 WARN L293 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 107 DAG size of output: 74 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-24 14:49:53,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:03,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:06,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:16,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:18,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:22,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:24,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:29,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:33,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:35,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:39,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:43,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:47,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:51,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-24 14:50:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:50:51,841 INFO L93 Difference]: Finished difference Result 933 states and 1193 transitions. [2023-12-24 14:50:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-24 14:50:51,842 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 16 states have call successors, (34), 14 states have call predecessors, (34), 16 states have return successors, (34), 14 states have call predecessors, (34), 16 states have call successors, (34) Word has length 130 [2023-12-24 14:50:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:50:51,845 INFO L225 Difference]: With dead ends: 933 [2023-12-24 14:50:51,845 INFO L226 Difference]: Without dead ends: 592 [2023-12-24 14:50:51,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 311 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5492 ImplicationChecksByTransitivity, 178.0s TimeCoverageRelationStatistics Valid=2604, Invalid=12642, Unknown=6, NotChecked=0, Total=15252 [2023-12-24 14:50:51,848 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 954 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 2924 mSolverCounterSat, 211 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2924 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.0s IncrementalHoareTripleChecker+Time [2023-12-24 14:50:51,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 2796 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2924 Invalid, 6 Unknown, 0 Unchecked, 55.0s Time] [2023-12-24 14:50:51,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-12-24 14:50:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 332. [2023-12-24 14:50:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 277 states have (on average 1.2671480144404332) internal successors, (351), 277 states have internal predecessors, (351), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-24 14:50:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 419 transitions. [2023-12-24 14:50:51,897 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 419 transitions. Word has length 130 [2023-12-24 14:50:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:50:51,898 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 419 transitions. [2023-12-24 14:50:51,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 16 states have call successors, (34), 14 states have call predecessors, (34), 16 states have return successors, (34), 14 states have call predecessors, (34), 16 states have call successors, (34) [2023-12-24 14:50:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 419 transitions. [2023-12-24 14:50:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-24 14:50:51,899 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:50:51,899 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:50:51,908 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 (20)] Ended with exit code 0 [2023-12-24 14:50:52,114 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 14:50:52,306 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 14:50:52,307 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:50:52,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:50:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1133622189, now seen corresponding path program 1 times [2023-12-24 14:50:52,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:50:52,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583014303] [2023-12-24 14:50:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:50:52,307 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 14:50:52,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:50:52,308 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 14:50:52,309 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 14:50:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:50:52,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-24 14:50:52,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:50:53,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-24 14:50:54,309 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 14 [2023-12-24 14:50:54,814 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 14 [2023-12-24 14:50:55,359 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 14 [2023-12-24 14:50:57,316 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 49 treesize of output 35 [2023-12-24 14:50:57,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:50:57,630 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 55 treesize of output 23 [2023-12-24 14:50:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 104 proven. 304 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-24 14:50:57,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:51:03,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:51:03,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583014303] [2023-12-24 14:51:03,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583014303] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:51:03,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [607208061] [2023-12-24 14:51:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:51:03,113 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:51:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:51:03,114 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 14:51:03,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-12-24 14:51:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:51:03,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-24 14:51:03,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:51:04,742 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 14:51:06,207 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 37 treesize of output 24 [2023-12-24 14:51:08,124 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 30 [2023-12-24 14:51:10,413 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 58 treesize of output 40 [2023-12-24 14:51:13,884 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 44 [2023-12-24 14:51:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 88 proven. 344 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-24 14:51:14,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:51:19,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [607208061] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:51:19,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:51:19,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 32] total 46 [2023-12-24 14:51:19,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750556758] [2023-12-24 14:51:19,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:51:19,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-24 14:51:19,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:51:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-24 14:51:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2287, Unknown=0, NotChecked=0, Total=2652 [2023-12-24 14:51:19,370 INFO L87 Difference]: Start difference. First operand 332 states and 419 transitions. Second operand has 47 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 states have internal predecessors, (119), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2023-12-24 14:51:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:51:31,977 INFO L93 Difference]: Finished difference Result 1027 states and 1304 transitions. [2023-12-24 14:51:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-24 14:51:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 states have internal predecessors, (119), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 130 [2023-12-24 14:51:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:51:31,983 INFO L225 Difference]: With dead ends: 1027 [2023-12-24 14:51:31,983 INFO L226 Difference]: Without dead ends: 696 [2023-12-24 14:51:31,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1150, Invalid=7222, Unknown=0, NotChecked=0, Total=8372 [2023-12-24 14:51:31,985 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 1037 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 2274 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-24 14:51:31,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 2274 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-12-24 14:51:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2023-12-24 14:51:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 346. [2023-12-24 14:51:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 291 states have (on average 1.2646048109965635) internal successors, (368), 291 states have internal predecessors, (368), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-24 14:51:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 436 transitions. [2023-12-24 14:51:32,039 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 436 transitions. Word has length 130 [2023-12-24 14:51:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:51:32,040 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 436 transitions. [2023-12-24 14:51:32,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 states have internal predecessors, (119), 13 states have call successors, (34), 11 states have call predecessors, (34), 13 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2023-12-24 14:51:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 436 transitions. [2023-12-24 14:51:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-24 14:51:32,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:51:32,041 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:51:32,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2023-12-24 14:51:32,256 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 14:51:32,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 14:51:32,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:51:32,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:51:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1834686767, now seen corresponding path program 1 times [2023-12-24 14:51:32,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:51:32,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259215279] [2023-12-24 14:51:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:51:32,452 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 14:51:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:51:32,453 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 14:51:32,454 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 14:51:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:51:32,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-24 14:51:32,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:51:34,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:51:35,078 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 21 treesize of output 24 [2023-12-24 14:51:35,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:51:35,313 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 39 treesize of output 15 [2023-12-24 14:51:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-24 14:51:35,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:51:36,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:51:36,518 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 2258 treesize of output 1981 [2023-12-24 14:51:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-12-24 14:51:38,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:51:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259215279] [2023-12-24 14:51:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259215279] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 14:51:38,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-24 14:51:38,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 18 [2023-12-24 14:51:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678682948] [2023-12-24 14:51:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 14:51:38,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-24 14:51:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:51:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-24 14:51:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-12-24 14:51:38,419 INFO L87 Difference]: Start difference. First operand 346 states and 436 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-24 14:51:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:51:41,275 INFO L93 Difference]: Finished difference Result 800 states and 1024 transitions. [2023-12-24 14:51:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-24 14:51:41,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 130 [2023-12-24 14:51:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:51:41,278 INFO L225 Difference]: With dead ends: 800 [2023-12-24 14:51:41,278 INFO L226 Difference]: Without dead ends: 455 [2023-12-24 14:51:41,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-12-24 14:51:41,279 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 271 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-24 14:51:41,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 914 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-24 14:51:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-12-24 14:51:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 357. [2023-12-24 14:51:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 302 states have (on average 1.2682119205298013) internal successors, (383), 302 states have internal predecessors, (383), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-24 14:51:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 451 transitions. [2023-12-24 14:51:41,335 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 451 transitions. Word has length 130 [2023-12-24 14:51:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:51:41,335 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 451 transitions. [2023-12-24 14:51:41,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-24 14:51:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 451 transitions. [2023-12-24 14:51:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-24 14:51:41,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:51:41,336 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:51:41,343 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 14:51:41,543 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 [2023-12-24 14:51:41,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:51:41,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:51:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1121698273, now seen corresponding path program 1 times [2023-12-24 14:51:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:51:41,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816429883] [2023-12-24 14:51:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:51:41,544 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 14:51:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:51:41,545 INFO L229 MonitoredProcess]: Starting monitored process 25 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 14:51:41,563 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 (25)] Waiting until timeout for monitored process [2023-12-24 14:51:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:51:41,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-24 14:51:41,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:51:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-24 14:51:42,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:51:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-12-24 14:51:42,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:51:42,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816429883] [2023-12-24 14:51:42,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816429883] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 14:51:42,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-24 14:51:42,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2023-12-24 14:51:42,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461081896] [2023-12-24 14:51:42,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 14:51:42,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-24 14:51:42,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:51:42,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-24 14:51:42,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-24 14:51:42,385 INFO L87 Difference]: Start difference. First operand 357 states and 451 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:51:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:51:42,567 INFO L93 Difference]: Finished difference Result 908 states and 1171 transitions. [2023-12-24 14:51:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-24 14:51:42,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 130 [2023-12-24 14:51:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:51:42,569 INFO L225 Difference]: With dead ends: 908 [2023-12-24 14:51:42,569 INFO L226 Difference]: Without dead ends: 552 [2023-12-24 14:51:42,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-12-24 14:51:42,571 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 98 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-24 14:51:42,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 509 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-24 14:51:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-12-24 14:51:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 440. [2023-12-24 14:51:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 385 states have (on average 1.2675324675324675) internal successors, (488), 385 states have internal predecessors, (488), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-24 14:51:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 556 transitions. [2023-12-24 14:51:42,651 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 556 transitions. Word has length 130 [2023-12-24 14:51:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:51:42,651 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 556 transitions. [2023-12-24 14:51:42,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:51:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 556 transitions. [2023-12-24 14:51:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-24 14:51:42,653 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:51:42,653 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:51:42,667 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 (25)] Forceful destruction successful, exit code 0 [2023-12-24 14:51:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /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 14:51:42,868 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:51:42,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:51:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1514725283, now seen corresponding path program 1 times [2023-12-24 14:51:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:51:42,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079035659] [2023-12-24 14:51:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:51:42,869 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 14:51:42,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:51:42,870 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 14:51:42,871 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 14:51:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:51:43,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-24 14:51:43,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:51:46,776 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 14:51:48,504 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 14 [2023-12-24 14:51:50,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:51:52,088 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-12-24 14:51:52,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2023-12-24 14:51:53,065 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 48 treesize of output 28 [2023-12-24 14:51:53,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-12-24 14:51:53,433 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 14:51:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 61 proven. 323 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-12-24 14:51:54,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:51:54,230 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 46 treesize of output 38 [2023-12-24 14:52:11,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:52:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079035659] [2023-12-24 14:52:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079035659] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:52:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366874] [2023-12-24 14:52:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:52:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:52:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:52:11,745 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 14:52:11,745 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 14:52:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:52:12,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-24 14:52:12,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:52:16,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-24 14:52:18,987 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 14 [2023-12-24 14:52:21,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:52:23,708 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 14:52:24,408 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 48 treesize of output 28 [2023-12-24 14:52:24,814 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 48 treesize of output 28 [2023-12-24 14:52:25,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-12-24 14:52:25,347 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 14:52:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 61 proven. 323 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-12-24 14:52:25,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:52:26,039 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 46 treesize of output 38 [2023-12-24 14:52:37,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:52:37,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:52:37,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2023-12-24 14:52:37,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426601743] [2023-12-24 14:52:37,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:52:37,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-24 14:52:37,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:52:37,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-24 14:52:37,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2100, Unknown=1, NotChecked=0, Total=2352 [2023-12-24 14:52:37,076 INFO L87 Difference]: Start difference. First operand 440 states and 556 transitions. Second operand has 43 states, 37 states have (on average 3.189189189189189) internal successors, (118), 36 states have internal predecessors, (118), 12 states have call successors, (34), 10 states have call predecessors, (34), 12 states have return successors, (34), 10 states have call predecessors, (34), 12 states have call successors, (34) [2023-12-24 14:52:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:52:52,491 INFO L93 Difference]: Finished difference Result 1321 states and 1667 transitions. [2023-12-24 14:52:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-24 14:52:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 3.189189189189189) internal successors, (118), 36 states have internal predecessors, (118), 12 states have call successors, (34), 10 states have call predecessors, (34), 12 states have return successors, (34), 10 states have call predecessors, (34), 12 states have call successors, (34) Word has length 130 [2023-12-24 14:52:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:52:52,495 INFO L225 Difference]: With dead ends: 1321 [2023-12-24 14:52:52,495 INFO L226 Difference]: Without dead ends: 882 [2023-12-24 14:52:52,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 264 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=1159, Invalid=5482, Unknown=1, NotChecked=0, Total=6642 [2023-12-24 14:52:52,497 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1516 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-12-24 14:52:52,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 1248 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-12-24 14:52:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-12-24 14:52:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 545. [2023-12-24 14:52:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 488 states have (on average 1.278688524590164) internal successors, (624), 488 states have internal predecessors, (624), 34 states have call successors, (34), 22 states have call predecessors, (34), 22 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-24 14:52:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 692 transitions. [2023-12-24 14:52:52,576 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 692 transitions. Word has length 130 [2023-12-24 14:52:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:52:52,576 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 692 transitions. [2023-12-24 14:52:52,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 3.189189189189189) internal successors, (118), 36 states have internal predecessors, (118), 12 states have call successors, (34), 10 states have call predecessors, (34), 12 states have return successors, (34), 10 states have call predecessors, (34), 12 states have call successors, (34) [2023-12-24 14:52:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 692 transitions. [2023-12-24 14:52:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-24 14:52:52,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:52:52,585 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:52:52,592 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 14:52:52,795 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 14:52:52,990 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 14:52:52,991 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:52:52,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:52:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1374176673, now seen corresponding path program 1 times [2023-12-24 14:52:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:52:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323838556] [2023-12-24 14:52:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:52:52,992 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 14:52:52,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:52:52,993 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 14:52:52,993 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 14:52:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:52:53,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-24 14:52:53,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:52:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-12-24 14:52:53,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 14:52:53,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:52:53,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323838556] [2023-12-24 14:52:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323838556] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 14:52:53,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 14:52:53,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-24 14:52:53,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227411733] [2023-12-24 14:52:53,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 14:52:53,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-24 14:52:53,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:52:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-24 14:52:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-24 14:52:53,254 INFO L87 Difference]: Start difference. First operand 545 states and 692 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:52:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 14:52:53,500 INFO L93 Difference]: Finished difference Result 1221 states and 1564 transitions. [2023-12-24 14:52:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-24 14:52:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 130 [2023-12-24 14:52:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 14:52:53,503 INFO L225 Difference]: With dead ends: 1221 [2023-12-24 14:52:53,503 INFO L226 Difference]: Without dead ends: 677 [2023-12-24 14:52:53,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 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 14:52:53,504 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 80 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-24 14:52:53,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 679 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-24 14:52:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2023-12-24 14:52:53,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 585. [2023-12-24 14:52:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 528 states have (on average 1.2765151515151516) internal successors, (674), 528 states have internal predecessors, (674), 34 states have call successors, (34), 22 states have call predecessors, (34), 22 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-24 14:52:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 742 transitions. [2023-12-24 14:52:53,579 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 742 transitions. Word has length 130 [2023-12-24 14:52:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 14:52:53,579 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 742 transitions. [2023-12-24 14:52:53,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-24 14:52:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 742 transitions. [2023-12-24 14:52:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-24 14:52:53,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 14:52:53,581 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:52:53,588 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 14:52:53,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 14:52:53,787 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 14:52:53,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 14:52:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1185094145, now seen corresponding path program 1 times [2023-12-24 14:52:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 14:52:53,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508819854] [2023-12-24 14:52:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:52:53,788 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 14:52:53,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 14:52:53,789 INFO L229 MonitoredProcess]: Starting monitored process 29 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 14:52:53,825 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 (29)] Waiting until timeout for monitored process [2023-12-24 14:52:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:52:54,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-24 14:52:54,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:52:56,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:52:57,679 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 14 [2023-12-24 14:52:59,632 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 44 treesize of output 27 [2023-12-24 14:53:05,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2023-12-24 14:53:06,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 74 [2023-12-24 14:53:11,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-24 14:53:11,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 200 treesize of output 80 [2023-12-24 14:53:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 159 proven. 279 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-24 14:53:11,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:54:39,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 14:54:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508819854] [2023-12-24 14:54:39,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508819854] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:54:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1421985697] [2023-12-24 14:54:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 14:54:39,336 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-24 14:54:39,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-24 14:54:39,337 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-24 14:54:39,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-24 14:54:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 14:54:39,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-24 14:54:39,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 14:54:42,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 14:54:45,710 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 14 [2023-12-24 14:54:49,293 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 44 treesize of output 27 [2023-12-24 14:54:57,470 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 64 treesize of output 49 [2023-12-24 14:55:00,603 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 110 treesize of output 74 [2023-12-24 14:55:14,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 70 [2023-12-24 14:55:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 159 proven. 279 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-24 14:55:18,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 14:56:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1421985697] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-24 14:56:00,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-24 14:56:00,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 76 [2023-12-24 14:56:00,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548050392] [2023-12-24 14:56:00,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-24 14:56:00,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-12-24 14:56:00,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 14:56:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-12-24 14:56:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=8152, Unknown=6, NotChecked=0, Total=9702 [2023-12-24 14:56:00,919 INFO L87 Difference]: Start difference. First operand 585 states and 742 transitions. Second operand has 77 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 16 states have call successors, (34), 14 states have call predecessors, (34), 16 states have return successors, (34), 14 states have call predecessors, (34), 16 states have call successors, (34) Received shutdown request... [2023-12-24 14:56:37,844 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 14:56:37,844 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 14:56:37,844 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 (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-24 14:56:37,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-24 14:56:37,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 303 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7275 ImplicationChecksByTransitivity, 171.4s TimeCoverageRelationStatistics Valid=3277, Invalid=16177, Unknown=6, NotChecked=0, Total=19460 [2023-12-24 14:56:37,971 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 896 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2023-12-24 14:56:37,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 3336 Invalid, 4295 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [109 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2023-12-24 14:56:37,972 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-24 14:56:37,984 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 (29)] Forceful destruction successful, exit code 0 [2023-12-24 14:56:38,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2023-12-24 14:56:38,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-24 14:56:38,380 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (585states) and FLOYD_HOARE automaton (currently 59 states, 77 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-28-1 term,while SimplifyDDA2 was simplifying 28 xjuncts wrt. a ATOM-1 context. [2023-12-24 14:56:38,383 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-24 14:56:38,386 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-24 14:56:38,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.12 02:56:38 BoogieIcfgContainer [2023-12-24 14:56:38,387 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-24 14:56:38,388 INFO L158 Benchmark]: Toolchain (without parser) took 854909.13ms. Allocated memory was 347.1MB in the beginning and 601.9MB in the end (delta: 254.8MB). Free memory was 300.1MB in the beginning and 360.1MB in the end (delta: -59.9MB). Peak memory consumption was 195.8MB. Max. memory is 8.0GB. [2023-12-24 14:56:38,388 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 211.8MB. Free memory is still 165.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-24 14:56:38,388 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.64ms. Allocated memory is still 347.1MB. Free memory was 299.8MB in the beginning and 284.3MB in the end (delta: 15.4MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-24 14:56:38,388 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.67ms. Allocated memory is still 347.1MB. Free memory was 284.3MB in the beginning and 281.2MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-24 14:56:38,388 INFO L158 Benchmark]: Boogie Preprocessor took 96.92ms. Allocated memory is still 347.1MB. Free memory was 281.2MB in the beginning and 276.7MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2023-12-24 14:56:38,389 INFO L158 Benchmark]: RCFGBuilder took 724.10ms. Allocated memory is still 347.1MB. Free memory was 276.7MB in the beginning and 309.5MB in the end (delta: -32.8MB). Peak memory consumption was 35.1MB. Max. memory is 8.0GB. [2023-12-24 14:56:38,389 INFO L158 Benchmark]: TraceAbstraction took 853715.81ms. Allocated memory was 347.1MB in the beginning and 601.9MB in the end (delta: 254.8MB). Free memory was 308.9MB in the beginning and 360.1MB in the end (delta: -51.1MB). Peak memory consumption was 203.7MB. Max. memory is 8.0GB. [2023-12-24 14:56:38,390 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 211.8MB. Free memory is still 165.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 314.64ms. Allocated memory is still 347.1MB. Free memory was 299.8MB in the beginning and 284.3MB in the end (delta: 15.4MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.67ms. Allocated memory is still 347.1MB. Free memory was 284.3MB in the beginning and 281.2MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 96.92ms. Allocated memory is still 347.1MB. Free memory was 281.2MB in the beginning and 276.7MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 724.10ms. Allocated memory is still 347.1MB. Free memory was 276.7MB in the beginning and 309.5MB in the end (delta: -32.8MB). Peak memory consumption was 35.1MB. Max. memory is 8.0GB. * TraceAbstraction took 853715.81ms. Allocated memory was 347.1MB in the beginning and 601.9MB in the end (delta: 254.8MB). Free memory was 308.9MB in the beginning and 360.1MB in the end (delta: -51.1MB). Peak memory consumption was 203.7MB. 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 constructing difference of abstraction (585states) and FLOYD_HOARE automaton (currently 59 states, 77 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-28-1 term,while SimplifyDDA2 was simplifying 28 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 87 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 853.7s, OverallIterations: 18, TraceHistogramMax: 17, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 241.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 10656 SdHoareTripleChecker+Valid, 112.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10544 mSDsluCounter, 22721 SdHoareTripleChecker+Invalid, 107.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20473 mSDsCounter, 1889 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24101 IncrementalHoareTripleChecker+Invalid, 25996 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1889 mSolverCounterUnsat, 2248 mSDtfsCounter, 24101 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5544 GetRequests, 4585 SyntacticMatches, 13 SemanticMatches, 945 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34852 ImplicationChecksByTransitivity, 579.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=585occurred in iteration=17, InterpolantAutomatonStates: 433, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 17 MinimizatonAttempts, 2420 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 596.7s InterpolantComputationTime, 3743 NumberOfCodeBlocks, 3743 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 4224 ConstructedInterpolants, 22 QuantifiedInterpolants, 116542 SizeOfPredicates, 591 NumberOfNonLiveVariables, 8344 ConjunctsInSsa, 1013 ConjunctsInUnsatCore, 33 InterpolantComputations, 8 PerfectInterpolantSequences, 10894/17952 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