/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/heap-data/packet_filter.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:10:08,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:10:08,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:10:09,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:10:09,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:10:09,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:10:09,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:10:09,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:10:09,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:10:09,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:10:09,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:10:09,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:10:09,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:10:09,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:10:09,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:10:09,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:10:09,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:10:09,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:10:09,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:10:09,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:10:09,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:10:09,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:10:09,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:10:09,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:10:09,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:10:09,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:10:09,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:10:09,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:10:09,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:10:09,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:10:09,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:10:09,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:10:09,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:10:09,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:10:09,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:10:09,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:10:09,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:10:09,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:10:09,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:10:09,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:10:09,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:10:09,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:10:09,116 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:10:09,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:10:09,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:10:09,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:10:09,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:10:09,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:10:09,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:10:09,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:10:09,118 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:10:09,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:10:09,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:10:09,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:10:09,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:10:09,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:10:09,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:10:09,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:10:09,120 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:10:09,120 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:10:09,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:10:09,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:10:09,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:10:09,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:10:09,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:10:09,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:10:09,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:10:09,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:10:09,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:10:09,121 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:10:09,121 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:10:09,121 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:10:09,122 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:10:09,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:10:09,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:10:09,122 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:10:09,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:10:09,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:10:09,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:10:09,398 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:10:09,400 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:10:09,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/packet_filter.i [2022-01-10 06:10:09,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035e69f05/2cc2624fa56a445cad82acc241767335/FLAG3c69d2f1c [2022-01-10 06:10:09,993 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:10:09,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/packet_filter.i [2022-01-10 06:10:10,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035e69f05/2cc2624fa56a445cad82acc241767335/FLAG3c69d2f1c [2022-01-10 06:10:10,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035e69f05/2cc2624fa56a445cad82acc241767335 [2022-01-10 06:10:10,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:10:10,467 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:10:10,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:10:10,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:10:10,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:10:10,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7efcb5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10, skipping insertion in model container [2022-01-10 06:10:10,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:10:10,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:10:10,768 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-data/packet_filter.i[23925,23938] [2022-01-10 06:10:10,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-data/packet_filter.i[24159,24172] [2022-01-10 06:10:10,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:10:10,800 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:10:10,844 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-data/packet_filter.i[23925,23938] [2022-01-10 06:10:10,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-data/packet_filter.i[24159,24172] [2022-01-10 06:10:10,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:10:10,878 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:10:10,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10 WrapperNode [2022-01-10 06:10:10,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:10:10,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:10:10,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:10:10,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:10:10,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,931 INFO L137 Inliner]: procedures = 134, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 159 [2022-01-10 06:10:10,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:10:10,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:10:10,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:10:10,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:10:10,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:10:10,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:10:10,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:10:10,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:10:10,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (1/1) ... [2022-01-10 06:10:10,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:10:10,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:10:10,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:10:11,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:10:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 06:10:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 06:10:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:10:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2022-01-10 06:10:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2022-01-10 06:10:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 06:10:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 06:10:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 06:10:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2022-01-10 06:10:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure send [2022-01-10 06:10:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2022-01-10 06:10:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 06:10:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 06:10:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-10 06:10:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:10:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-01-10 06:10:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:10:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:10:11,179 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:10:11,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:10:13,073 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:10:13,079 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:10:13,079 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 06:10:13,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:10:13 BoogieIcfgContainer [2022-01-10 06:10:13,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:10:13,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:10:13,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:10:13,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:10:13,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:10:10" (1/3) ... [2022-01-10 06:10:13,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406108a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:10:13, skipping insertion in model container [2022-01-10 06:10:13,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:10:10" (2/3) ... [2022-01-10 06:10:13,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406108a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:10:13, skipping insertion in model container [2022-01-10 06:10:13,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:10:13" (3/3) ... [2022-01-10 06:10:13,088 INFO L111 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2022-01-10 06:10:13,092 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:10:13,092 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 06:10:13,132 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:10:13,138 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:10:13,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 06:10:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 38 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 06:10:13,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:13,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:13,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1939589719, now seen corresponding path program 1 times [2022-01-10 06:10:13,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:13,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793572904] [2022-01-10 06:10:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:13,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:13,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:13,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:10:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:10:13,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:13,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:10:13,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793572904] [2022-01-10 06:10:13,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793572904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:10:13,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:10:13,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:10:13,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062102067] [2022-01-10 06:10:13,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:10:13,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:10:13,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:13,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:10:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:10:13,374 INFO L87 Difference]: Start difference. First operand has 46 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 38 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:13,401 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2022-01-10 06:10:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:10:13,403 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 06:10:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:13,411 INFO L225 Difference]: With dead ends: 73 [2022-01-10 06:10:13,411 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 06:10:13,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:10:13,421 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:13,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:10:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 06:10:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-10 06:10:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.303030303030303) internal successors, (43), 34 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-01-10 06:10:13,465 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 8 [2022-01-10 06:10:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:13,465 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-01-10 06:10:13,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-01-10 06:10:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 06:10:13,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:13,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:13,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:13,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:13,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1296098990, now seen corresponding path program 1 times [2022-01-10 06:10:13,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:13,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518575445] [2022-01-10 06:10:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:13,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:13,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:13,682 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:13,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:10:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:10:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:13,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:13,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:13,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:10:13,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:13,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518575445] [2022-01-10 06:10:13,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518575445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:10:13,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:10:13,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:10:13,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212192574] [2022-01-10 06:10:13,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:10:13,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:10:13,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:10:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:10:13,992 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:16,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:16,267 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2022-01-10 06:10:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:10:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 06:10:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:16,270 INFO L225 Difference]: With dead ends: 75 [2022-01-10 06:10:16,270 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 06:10:16,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:10:16,272 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:16,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 121 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 06:10:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 06:10:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2022-01-10 06:10:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-01-10 06:10:16,281 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 8 [2022-01-10 06:10:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:16,282 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-01-10 06:10:16,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-01-10 06:10:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:10:16,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:16,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:16,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:16,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:16,494 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:16,494 INFO L85 PathProgramCache]: Analyzing trace with hash -27492729, now seen corresponding path program 1 times [2022-01-10 06:10:16,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:16,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582097248] [2022-01-10 06:10:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:16,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:16,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:10:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:10:16,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:16,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:16,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:16,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:10:16,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:16,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582097248] [2022-01-10 06:10:16,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582097248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:10:16,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:10:16,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:10:16,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739359927] [2022-01-10 06:10:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:10:16,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:10:16,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:10:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:10:16,765 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:18,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:19,023 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-01-10 06:10:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:10:19,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 06:10:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:19,025 INFO L225 Difference]: With dead ends: 59 [2022-01-10 06:10:19,025 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:10:19,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:10:19,026 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:19,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 06:10:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:10:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-10 06:10:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 35 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-01-10 06:10:19,033 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 10 [2022-01-10 06:10:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-01-10 06:10:19,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-01-10 06:10:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 06:10:19,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:19,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:19,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:19,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:19,244 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -817522987, now seen corresponding path program 1 times [2022-01-10 06:10:19,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:19,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651229666] [2022-01-10 06:10:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:19,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:19,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:19,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:10:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:10:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:10:19,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:10:19,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:19,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651229666] [2022-01-10 06:10:19,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651229666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:10:19,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:10:19,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:10:19,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393818161] [2022-01-10 06:10:19,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:10:19,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:10:19,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:10:19,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:10:19,384 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:19,418 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-01-10 06:10:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:10:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 06:10:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:19,420 INFO L225 Difference]: With dead ends: 46 [2022-01-10 06:10:19,420 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 06:10:19,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:10:19,421 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:19,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:10:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 06:10:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-10 06:10:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-01-10 06:10:19,436 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 14 [2022-01-10 06:10:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:19,436 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-01-10 06:10:19,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:19,437 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-01-10 06:10:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 06:10:19,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:19,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:19,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:19,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:19,638 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:19,639 INFO L85 PathProgramCache]: Analyzing trace with hash -817521065, now seen corresponding path program 1 times [2022-01-10 06:10:19,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:19,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72212805] [2022-01-10 06:10:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:19,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:19,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:19,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:10:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 06:10:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:19,842 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-01-10 06:10:19,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-01-10 06:10:19,994 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:10:19,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-01-10 06:10:20,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:10:20,094 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:10:20,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-01-10 06:10:20,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:10:20,168 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 06:10:20,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 19 [2022-01-10 06:10:20,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-01-10 06:10:20,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-01-10 06:10:20,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:20,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:20,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:10:20,633 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_82 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_82) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|))) (forall ((v_ArrVal_80 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_80) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|)))) is different from false [2022-01-10 06:10:20,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~#new_packet~0#1.base_12| (_ BitVec 64)) (|v_ULTIMATE.start_receive_~#packet~0#1.base_7| (_ BitVec 64))) (or (and (forall ((v_ArrVal_82 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_7| v_ArrVal_82) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|))) (forall ((v_ArrVal_80 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_7| v_ArrVal_80) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|)))) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~#new_packet~0#1.base_12| (_ bv1 1)) |v_ULTIMATE.start_receive_~#packet~0#1.base_7|) (_ bv0 1))))) is different from false [2022-01-10 06:10:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-10 06:10:20,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72212805] [2022-01-10 06:10:20,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72212805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:10:20,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:10:20,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-10 06:10:20,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750677033] [2022-01-10 06:10:20,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:10:20,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:10:20,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:20,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:10:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=21, Unknown=2, NotChecked=18, Total=56 [2022-01-10 06:10:20,815 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:22,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:22,966 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-01-10 06:10:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:10:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 06:10:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:22,968 INFO L225 Difference]: With dead ends: 89 [2022-01-10 06:10:22,968 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 06:10:22,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=47, Unknown=2, NotChecked=30, Total=110 [2022-01-10 06:10:22,970 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 39 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:22,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 193 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 86 Unchecked, 1.9s Time] [2022-01-10 06:10:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 06:10:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2022-01-10 06:10:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-01-10 06:10:22,977 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 14 [2022-01-10 06:10:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:22,977 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-01-10 06:10:22,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-01-10 06:10:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 06:10:22,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:22,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:22,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:23,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:23,191 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash 301318382, now seen corresponding path program 1 times [2022-01-10 06:10:23,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866788798] [2022-01-10 06:10:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:23,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:23,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:23,194 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:23,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:10:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:23,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:10:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:23,374 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-01-10 06:10:23,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2022-01-10 06:10:23,475 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:10:23,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-01-10 06:10:23,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:10:23,565 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:10:23,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-01-10 06:10:23,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:10:23,626 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 06:10:23,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 15 [2022-01-10 06:10:23,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-01-10 06:10:23,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-01-10 06:10:23,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:23,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:23,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:10:24,034 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_119 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_119) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|))) (forall ((v_ArrVal_122 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_receive_~#packet~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|)))) is different from false [2022-01-10 06:10:24,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_receive_~#packet~0#1.base_10| (_ BitVec 64)) (|v_ULTIMATE.start_main_~#new_packet~0#1.base_15| (_ BitVec 64))) (or (and (forall ((v_ArrVal_122 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_receive_~#packet~0#1.base_10| v_ArrVal_122) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|))) (forall ((v_ArrVal_119 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_receive_~#packet~0#1.base_10| v_ArrVal_119) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) |c_ULTIMATE.start_main_~#normal_queue~0#1.offset|) (_ bv0 64)))) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~#new_packet~0#1.base_15| (_ bv1 1)) |v_ULTIMATE.start_receive_~#packet~0#1.base_10|) (_ bv0 1))))) is different from false [2022-01-10 06:10:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-10 06:10:24,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:24,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866788798] [2022-01-10 06:10:24,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866788798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:10:24,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:10:24,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-10 06:10:24,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773729890] [2022-01-10 06:10:24,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:10:24,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:10:24,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:24,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:10:24,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=21, Unknown=2, NotChecked=18, Total=56 [2022-01-10 06:10:24,188 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:26,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:26,712 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-01-10 06:10:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:10:26,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 06:10:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:26,714 INFO L225 Difference]: With dead ends: 72 [2022-01-10 06:10:26,714 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 06:10:26,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=47, Unknown=2, NotChecked=30, Total=110 [2022-01-10 06:10:26,715 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:26,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 212 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 1 Unknown, 71 Unchecked, 2.3s Time] [2022-01-10 06:10:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 06:10:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-01-10 06:10:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2022-01-10 06:10:26,721 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 16 [2022-01-10 06:10:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:26,721 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2022-01-10 06:10:26,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:10:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2022-01-10 06:10:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 06:10:26,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:26,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:26,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:10:26,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:26,933 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash -987183320, now seen corresponding path program 1 times [2022-01-10 06:10:26,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:26,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046216119] [2022-01-10 06:10:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:26,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:26,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:26,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:10:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:27,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:10:27,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:27,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 06:10:27,362 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-10 06:10:27,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 10 [2022-01-10 06:10:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:27,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:10:27,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046216119] [2022-01-10 06:10:27,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046216119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:10:27,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:10:27,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:10:27,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80265204] [2022-01-10 06:10:27,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:10:27,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:10:27,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:10:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:10:27,421 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:10:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:27,500 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-01-10 06:10:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:10:27,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-10 06:10:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:27,502 INFO L225 Difference]: With dead ends: 100 [2022-01-10 06:10:27,502 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 06:10:27,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:10:27,503 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:27,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 208 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-01-10 06:10:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 06:10:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-01-10 06:10:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 49 states have internal predecessors, (62), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2022-01-10 06:10:27,509 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 20 [2022-01-10 06:10:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:27,509 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2022-01-10 06:10:27,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:10:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2022-01-10 06:10:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 06:10:27,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:27,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:27,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 06:10:27,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:27,711 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1719436074, now seen corresponding path program 1 times [2022-01-10 06:10:27,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:27,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257147577] [2022-01-10 06:10:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:27,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:27,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:27,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:27,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:10:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 06:10:28,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:28,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-10 06:10:28,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2022-01-10 06:10:28,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 45 [2022-01-10 06:10:28,457 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-10 06:10:28,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 45 [2022-01-10 06:10:28,588 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-10 06:10:28,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-10 06:10:28,692 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-10 06:10:28,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-10 06:10:28,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-01-10 06:10:28,856 INFO L353 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-01-10 06:10:28,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-10 06:10:28,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-01-10 06:10:28,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:10:28,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-01-10 06:10:29,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:10:29,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:10:29,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:10:29,509 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:10:29,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 53 [2022-01-10 06:10:29,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-01-10 06:10:29,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-01-10 06:10:29,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:10:29,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-10 06:10:30,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-01-10 06:10:30,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:30,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:10:32,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:32,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 54 [2022-01-10 06:10:32,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:32,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 52 [2022-01-10 06:10:32,935 INFO L353 Elim1Store]: treesize reduction 17, result has 70.7 percent of original size [2022-01-10 06:10:32,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 55 [2022-01-10 06:10:32,950 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:10:32,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 26 [2022-01-10 06:10:32,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-10 06:10:33,308 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-01-10 06:10:33,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 1 [2022-01-10 06:10:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:33,635 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257147577] [2022-01-10 06:10:33,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257147577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:10:33,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:10:33,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-01-10 06:10:33,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227315873] [2022-01-10 06:10:33,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:10:33,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:10:33,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:10:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:10:33,637 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:10:36,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:37,507 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-01-10 06:10:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:10:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-10 06:10:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:37,509 INFO L225 Difference]: With dead ends: 85 [2022-01-10 06:10:37,509 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 06:10:37,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:10:37,510 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 102 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:37,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 237 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 141 Invalid, 1 Unknown, 35 Unchecked, 3.3s Time] [2022-01-10 06:10:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 06:10:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-10 06:10:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:10:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-01-10 06:10:37,517 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 20 [2022-01-10 06:10:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:37,517 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-01-10 06:10:37,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:10:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-01-10 06:10:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 06:10:37,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:37,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:37,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:37,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:37,732 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2057977750, now seen corresponding path program 1 times [2022-01-10 06:10:37,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:37,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23030983] [2022-01-10 06:10:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:37,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:37,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:37,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:10:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-10 06:10:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:38,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:10:38,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:38,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 06:10:38,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:10:38,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 55 [2022-01-10 06:10:38,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 51 [2022-01-10 06:10:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:38,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:38,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:38,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:39,171 INFO L353 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2022-01-10 06:10:39,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 79 [2022-01-10 06:10:39,311 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-10 06:10:39,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-10 06:10:39,449 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-10 06:10:39,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-10 06:10:39,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-01-10 06:10:39,656 INFO L353 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-01-10 06:10:39,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 86 [2022-01-10 06:10:39,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-01-10 06:10:39,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:10:39,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:10:39,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:10:40,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:10:40,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:40,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 67 [2022-01-10 06:10:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:40,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-01-10 06:10:40,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-10 06:10:40,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:10:40,901 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:10:40,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2022-01-10 06:10:40,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-01-10 06:10:41,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 18 [2022-01-10 06:10:41,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-10 06:10:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:41,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:10:43,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:43,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 60 [2022-01-10 06:10:43,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:43,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 58 [2022-01-10 06:10:44,001 INFO L353 Elim1Store]: treesize reduction 308, result has 20.8 percent of original size [2022-01-10 06:10:44,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 95 [2022-01-10 06:10:44,015 INFO L353 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-01-10 06:10:44,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 60 [2022-01-10 06:10:44,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-10 06:10:44,429 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-01-10 06:10:44,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 1 [2022-01-10 06:10:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:10:45,115 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23030983] [2022-01-10 06:10:45,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23030983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:10:45,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:10:45,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2022-01-10 06:10:45,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451573001] [2022-01-10 06:10:45,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:10:45,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:10:45,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:10:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:10:45,117 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:10:47,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:49,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:51,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:53,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:10:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:54,815 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2022-01-10 06:10:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:10:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-01-10 06:10:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:54,817 INFO L225 Difference]: With dead ends: 102 [2022-01-10 06:10:54,817 INFO L226 Difference]: Without dead ends: 100 [2022-01-10 06:10:54,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:10:54,818 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:54,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 374 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 4 Unknown, 122 Unchecked, 9.1s Time] [2022-01-10 06:10:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-10 06:10:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2022-01-10 06:10:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 71 states have (on average 1.352112676056338) internal successors, (96), 72 states have internal predecessors, (96), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 06:10:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2022-01-10 06:10:54,826 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 21 [2022-01-10 06:10:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:54,826 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2022-01-10 06:10:54,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 19 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:10:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2022-01-10 06:10:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 06:10:54,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:54,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:54,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:55,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:55,042 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:55,043 INFO L85 PathProgramCache]: Analyzing trace with hash 382908074, now seen corresponding path program 1 times [2022-01-10 06:10:55,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:55,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088463461] [2022-01-10 06:10:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:55,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:55,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:55,044 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:55,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:10:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:55,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-10 06:10:55,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:55,496 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-01-10 06:10:55,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2022-01-10 06:10:55,733 INFO L353 Elim1Store]: treesize reduction 89, result has 31.5 percent of original size [2022-01-10 06:10:55,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 65 [2022-01-10 06:10:55,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 06:10:55,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 06:10:56,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 06:10:56,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 06:10:56,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 38 [2022-01-10 06:10:56,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-10 06:10:56,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 16 [2022-01-10 06:10:56,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-10 06:10:56,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 43 treesize of output 43 [2022-01-10 06:10:56,932 INFO L353 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-01-10 06:10:56,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 48 [2022-01-10 06:10:56,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 18 [2022-01-10 06:10:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:59,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:59,340 INFO L353 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-01-10 06:10:59,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 62 [2022-01-10 06:10:59,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:59,581 INFO L353 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-01-10 06:10:59,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-01-10 06:10:59,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-01-10 06:10:59,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:59,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 40 [2022-01-10 06:10:59,908 INFO L353 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-01-10 06:10:59,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2022-01-10 06:11:00,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-10 06:11:00,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:11:00,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:11:00,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:11:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:11:00,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:11:04,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:11:04,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 68 [2022-01-10 06:11:05,047 INFO L353 Elim1Store]: treesize reduction 35, result has 52.7 percent of original size [2022-01-10 06:11:05,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 75 [2022-01-10 06:11:05,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:11:05,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2022-01-10 06:11:05,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:11:05,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-10 06:11:05,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:11:05,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-10 06:11:05,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:11:05,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-10 06:11:06,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:11:06,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-10 06:11:07,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:11:07,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-10 06:11:07,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:11:07,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-10 06:11:09,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:11:09,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-10 06:11:09,306 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_24 (Array (_ BitVec 64) (_ BitVec 64))) (v_arrayElimArr_23 (Array (_ BitVec 64) (_ BitVec 64))) (v_append_to_queue_~node~0.offset_12 (_ BitVec 64)) (|v_append_to_queue_~#p.base_29| (_ BitVec 64)) (v_arrayElimArr_25 (Array (_ BitVec 64) (_ BitVec 64))) (v_append_to_queue_~q.offset_12 (_ BitVec 64)) (v_append_to_queue_~node~0.base_12 (_ BitVec 64))) (let ((.cse1 (select v_arrayElimArr_23 (_ bv8 64))) (.cse0 (bvadd (_ bv8 64) v_append_to_queue_~node~0.offset_12))) (or (not (= (select v_arrayElimArr_25 .cse0) .cse1)) (not (bvult v_append_to_queue_~node~0.base_12 |c_#StackHeapBarrier|)) (not (= .cse1 (select v_arrayElimArr_24 .cse0))) (not (= (select v_arrayElimArr_24 (bvadd v_append_to_queue_~node~0.offset_12 (_ bv16 64))) (select (select (store (store |c_#memory_$Pointer$.base| |v_append_to_queue_~#p.base_29| v_arrayElimArr_23) v_append_to_queue_~node~0.base_12 v_arrayElimArr_25) |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) v_append_to_queue_~q.offset_12))) (and (forall ((v_ArrVal_706 (Array (_ BitVec 64) (_ BitVec 64))) (v_arrayElimArr_26 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_708 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store (store (store |c_#memory_$Pointer$.offset| |v_append_to_queue_~#p.base_29| v_arrayElimArr_26) v_append_to_queue_~node~0.base_12 v_ArrVal_708) |c_ULTIMATE.start_main_~#normal_queue~0#1.base| v_ArrVal_706) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|))) (forall ((v_ArrVal_709 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select (select (store (store (store |c_#memory_$Pointer$.base| |v_append_to_queue_~#p.base_29| v_arrayElimArr_23) v_append_to_queue_~node~0.base_12 v_arrayElimArr_24) |c_ULTIMATE.start_main_~#normal_queue~0#1.base| v_ArrVal_709) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) (_ bv0 64)))) (not (= (select |c_#valid| |v_append_to_queue_~#p.base_29|) (_ bv0 1)))))) is different from false [2022-01-10 06:11:09,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088463461] [2022-01-10 06:11:09,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088463461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:11:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501352417] [2022-01-10 06:11:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:09,322 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:11:09,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:11:09,327 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) [2022-01-10 06:11:09,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-01-10 06:11:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:09,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-10 06:11:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:09,876 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-01-10 06:11:09,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2022-01-10 06:11:10,021 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:11:10,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-01-10 06:11:10,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-10 06:11:10,136 INFO L353 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2022-01-10 06:11:10,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2022-01-10 06:11:10,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 06:11:10,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-01-10 06:11:10,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 06:11:10,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 06:11:10,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-10 06:11:10,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-10 06:11:10,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-10 06:11:11,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:11:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:11:11,239 INFO L353 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-01-10 06:11:11,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 37 [2022-01-10 06:11:11,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:11:11,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:11:11,388 INFO L353 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-01-10 06:11:11,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 37 [2022-01-10 06:11:11,445 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 06:11:11,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2022-01-10 06:11:11,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:11:11,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-10 06:11:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:11:11,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:11:12,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501352417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:11:12,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:11:12,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-01-10 06:11:12,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669545570] [2022-01-10 06:11:12,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:11:12,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:11:12,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:11:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=137, Unknown=2, NotChecked=24, Total=210 [2022-01-10 06:11:12,667 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:11:14,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:11:16,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 06:11:18,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []