/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/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:21:25,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:21:25,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:21:25,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:21:25,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:21:26,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:21:26,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:21:26,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:21:26,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:21:26,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:21:26,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:21:26,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:21:26,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:21:26,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:21:26,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:21:26,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:21:26,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:21:26,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:21:26,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:21:26,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:21:26,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:21:26,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:21:26,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:21:26,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:21:26,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:21:26,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:21:26,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:21:26,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:21:26,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:21:26,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 08:21:26,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:21:26,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:21:26,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:21:26,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:21:26,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:21:26,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:21:26,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:21:26,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:21:26,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:21:26,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:21:26,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:21:26,046 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 08:21:26,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:21:26,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:21:26,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:21:26,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:21:26,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:21:26,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:21:26,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:21:26,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:21:26,078 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:21:26,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:21:26,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:21:26,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:21:26,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:21:26,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:21:26,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:21:26,079 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:21:26,080 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:21:26,080 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:21:26,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:21:26,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:21:26,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:21:26,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:21:26,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:21:26,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:21:26,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:21:26,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:21:26,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:21:26,081 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:21:26,081 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:21:26,081 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:21:26,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:21:26,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:21:26,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:21:26,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:21:26,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:21:26,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:21:26,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:21:26,293 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:21:26,295 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:21:26,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-01-10 08:21:26,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83e3f75b/6e6dbd5497c94408ad376b8a054c0fb5/FLAG2d41c3816 [2022-01-10 08:21:26,737 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:21:26,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-01-10 08:21:26,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83e3f75b/6e6dbd5497c94408ad376b8a054c0fb5/FLAG2d41c3816 [2022-01-10 08:21:27,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83e3f75b/6e6dbd5497c94408ad376b8a054c0fb5 [2022-01-10 08:21:27,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:21:27,128 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:21:27,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:21:27,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:21:27,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:21:27,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9730e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27, skipping insertion in model container [2022-01-10 08:21:27,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:21:27,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:21:27,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2022-01-10 08:21:27,414 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2022-01-10 08:21:27,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:21:27,514 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:21:27,530 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2022-01-10 08:21:27,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2022-01-10 08:21:27,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:21:27,645 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:21:27,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27 WrapperNode [2022-01-10 08:21:27,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:21:27,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:21:27,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:21:27,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:21:27,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,720 INFO L137 Inliner]: procedures = 74, calls = 88, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 893 [2022-01-10 08:21:27,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:21:27,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:21:27,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:21:27,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:21:27,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:21:27,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:21:27,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:21:27,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:21:27,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (1/1) ... [2022-01-10 08:21:27,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:21:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:21:27,837 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 08:21:27,861 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 08:21:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:21:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:21:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:21:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-01-10 08:21:27,883 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-01-10 08:21:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:21:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:21:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:21:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:21:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-01-10 08:21:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-01-10 08:21:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:21:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:21:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:21:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:21:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-01-10 08:21:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-01-10 08:21:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:21:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-01-10 08:21:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-01-10 08:21:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-01-10 08:21:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-01-10 08:21:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:21:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:21:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:21:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:21:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-01-10 08:21:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-01-10 08:21:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:21:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:21:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:21:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:21:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-01-10 08:21:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-01-10 08:21:28,022 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:21:28,023 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:21:28,741 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:21:28,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:21:28,759 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2022-01-10 08:21:28,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:21:28 BoogieIcfgContainer [2022-01-10 08:21:28,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:21:28,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:21:28,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:21:28,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:21:28,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:21:27" (1/3) ... [2022-01-10 08:21:28,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccd52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:21:28, skipping insertion in model container [2022-01-10 08:21:28,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:27" (2/3) ... [2022-01-10 08:21:28,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccd52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:21:28, skipping insertion in model container [2022-01-10 08:21:28,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:21:28" (3/3) ... [2022-01-10 08:21:28,770 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-01-10 08:21:28,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:21:28,774 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:21:28,820 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:21:28,825 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 08:21:28,825 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:21:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 383 states have (on average 1.6370757180156659) internal successors, (627), 391 states have internal predecessors, (627), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-10 08:21:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:21:28,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:28,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:28,857 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1192357691, now seen corresponding path program 1 times [2022-01-10 08:21:28,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:28,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271608543] [2022-01-10 08:21:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:28,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:28,877 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 08:21:28,880 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 08:21:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 08:21:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:29,248 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 08:21:29,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:29,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271608543] [2022-01-10 08:21:29,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271608543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:29,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:29,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:21:29,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109081482] [2022-01-10 08:21:29,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:29,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:29,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:29,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:29,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:29,295 INFO L87 Difference]: Start difference. First operand has 441 states, 383 states have (on average 1.6370757180156659) internal successors, (627), 391 states have internal predecessors, (627), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:21:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:30,261 INFO L93 Difference]: Finished difference Result 958 states and 1530 transitions. [2022-01-10 08:21:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:21:30,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:21:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:30,287 INFO L225 Difference]: With dead ends: 958 [2022-01-10 08:21:30,287 INFO L226 Difference]: Without dead ends: 533 [2022-01-10 08:21:30,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:30,300 INFO L933 BasicCegarLoop]: 681 mSDtfsCounter, 438 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:30,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 1726 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 08:21:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-10 08:21:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 526. [2022-01-10 08:21:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 451 states have (on average 1.5210643015521064) internal successors, (686), 458 states have internal predecessors, (686), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2022-01-10 08:21:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 789 transitions. [2022-01-10 08:21:30,408 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 789 transitions. Word has length 65 [2022-01-10 08:21:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:30,409 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 789 transitions. [2022-01-10 08:21:30,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:21:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 789 transitions. [2022-01-10 08:21:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:21:30,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:30,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:30,432 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 08:21:30,632 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 08:21:30,632 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash -929120350, now seen corresponding path program 1 times [2022-01-10 08:21:30,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:30,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879841062] [2022-01-10 08:21:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:30,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:30,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:30,636 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 08:21:30,638 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 08:21:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:30,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:21:30,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:30,918 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 08:21:30,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:30,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:30,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879841062] [2022-01-10 08:21:30,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879841062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:30,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:30,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:21:30,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973473078] [2022-01-10 08:21:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:30,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:30,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:30,921 INFO L87 Difference]: Start difference. First operand 526 states and 789 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:21:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:31,670 INFO L93 Difference]: Finished difference Result 918 states and 1343 transitions. [2022-01-10 08:21:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:21:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:21:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:31,675 INFO L225 Difference]: With dead ends: 918 [2022-01-10 08:21:31,675 INFO L226 Difference]: Without dead ends: 739 [2022-01-10 08:21:31,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:31,677 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 425 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:31,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1656 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 08:21:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-10 08:21:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 731. [2022-01-10 08:21:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 612 states have (on average 1.473856209150327) internal successors, (902), 627 states have internal predecessors, (902), 73 states have call successors, (73), 36 states have call predecessors, (73), 44 states have return successors, (94), 72 states have call predecessors, (94), 69 states have call successors, (94) [2022-01-10 08:21:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1069 transitions. [2022-01-10 08:21:31,707 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1069 transitions. Word has length 65 [2022-01-10 08:21:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:31,707 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 1069 transitions. [2022-01-10 08:21:31,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:21:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1069 transitions. [2022-01-10 08:21:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:21:31,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:31,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:31,719 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 08:21:31,919 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 08:21:31,919 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:31,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1203247330, now seen corresponding path program 1 times [2022-01-10 08:21:31,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:31,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642866828] [2022-01-10 08:21:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:31,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:31,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:31,924 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 08:21:31,926 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 08:21:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:21:32,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:32,125 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 08:21:32,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:32,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:32,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642866828] [2022-01-10 08:21:32,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642866828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:32,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:32,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:21:32,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442800609] [2022-01-10 08:21:32,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:32,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:21:32,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:21:32,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:32,128 INFO L87 Difference]: Start difference. First operand 731 states and 1069 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:21:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:32,188 INFO L93 Difference]: Finished difference Result 1121 states and 1601 transitions. [2022-01-10 08:21:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:21:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:21:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:32,195 INFO L225 Difference]: With dead ends: 1121 [2022-01-10 08:21:32,195 INFO L226 Difference]: Without dead ends: 751 [2022-01-10 08:21:32,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:21:32,198 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 7 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3269 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:32,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 3269 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-10 08:21:32,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 741. [2022-01-10 08:21:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 620 states have (on average 1.4645161290322581) internal successors, (908), 635 states have internal predecessors, (908), 73 states have call successors, (73), 36 states have call predecessors, (73), 46 states have return successors, (96), 74 states have call predecessors, (96), 69 states have call successors, (96) [2022-01-10 08:21:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1077 transitions. [2022-01-10 08:21:32,233 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1077 transitions. Word has length 65 [2022-01-10 08:21:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:32,233 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1077 transitions. [2022-01-10 08:21:32,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:21:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1077 transitions. [2022-01-10 08:21:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:21:32,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:32,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:32,247 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 08:21:32,443 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 08:21:32,444 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:32,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:32,444 INFO L85 PathProgramCache]: Analyzing trace with hash 173888032, now seen corresponding path program 1 times [2022-01-10 08:21:32,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:32,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654461241] [2022-01-10 08:21:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:32,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:32,446 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 08:21:32,448 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 08:21:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:21:32,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:32,649 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 08:21:32,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:32,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:32,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654461241] [2022-01-10 08:21:32,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654461241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:32,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:32,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:21:32,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543419241] [2022-01-10 08:21:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:32,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:21:32,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:21:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:32,651 INFO L87 Difference]: Start difference. First operand 741 states and 1077 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:21:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:32,696 INFO L93 Difference]: Finished difference Result 1135 states and 1607 transitions. [2022-01-10 08:21:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:21:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:21:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:32,700 INFO L225 Difference]: With dead ends: 1135 [2022-01-10 08:21:32,700 INFO L226 Difference]: Without dead ends: 755 [2022-01-10 08:21:32,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:21:32,702 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 4 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:32,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3265 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-10 08:21:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 751. [2022-01-10 08:21:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 628 states have (on average 1.4554140127388535) internal successors, (914), 643 states have internal predecessors, (914), 73 states have call successors, (73), 36 states have call predecessors, (73), 48 states have return successors, (98), 76 states have call predecessors, (98), 69 states have call successors, (98) [2022-01-10 08:21:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1085 transitions. [2022-01-10 08:21:32,728 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1085 transitions. Word has length 65 [2022-01-10 08:21:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:32,729 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1085 transitions. [2022-01-10 08:21:32,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:21:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1085 transitions. [2022-01-10 08:21:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:21:32,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:32,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:32,741 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 08:21:32,941 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 08:21:32,942 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:32,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1560091426, now seen corresponding path program 1 times [2022-01-10 08:21:32,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:32,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318538448] [2022-01-10 08:21:32,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:32,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:32,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:32,944 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 08:21:32,946 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 08:21:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:33,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:33,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:33,153 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 08:21:33,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:33,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318538448] [2022-01-10 08:21:33,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318538448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:33,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:33,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:33,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488565385] [2022-01-10 08:21:33,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:33,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:21:33,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:33,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:21:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:21:33,158 INFO L87 Difference]: Start difference. First operand 751 states and 1085 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 08:21:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:33,468 INFO L93 Difference]: Finished difference Result 1523 states and 2106 transitions. [2022-01-10 08:21:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:21:33,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-01-10 08:21:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:33,474 INFO L225 Difference]: With dead ends: 1523 [2022-01-10 08:21:33,474 INFO L226 Difference]: Without dead ends: 1137 [2022-01-10 08:21:33,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:33,475 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 901 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:33,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 997 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-01-10 08:21:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1133. [2022-01-10 08:21:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 920 states have (on average 1.3978260869565218) internal successors, (1286), 950 states have internal predecessors, (1286), 119 states have call successors, (119), 64 states have call predecessors, (119), 92 states have return successors, (183), 127 states have call predecessors, (183), 115 states have call successors, (183) [2022-01-10 08:21:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1588 transitions. [2022-01-10 08:21:33,514 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1588 transitions. Word has length 65 [2022-01-10 08:21:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:33,514 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 1588 transitions. [2022-01-10 08:21:33,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 08:21:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1588 transitions. [2022-01-10 08:21:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:21:33,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:33,517 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:33,527 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 08:21:33,727 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 08:21:33,727 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:33,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1800845042, now seen corresponding path program 1 times [2022-01-10 08:21:33,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:33,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634319996] [2022-01-10 08:21:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:33,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:33,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:33,730 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 08:21:33,730 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 08:21:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:33,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:33,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:33,985 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 08:21:33,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:33,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:33,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634319996] [2022-01-10 08:21:33,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634319996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:33,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:33,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:33,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194929570] [2022-01-10 08:21:33,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:33,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:33,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:33,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:33,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:33,988 INFO L87 Difference]: Start difference. First operand 1133 states and 1588 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:34,068 INFO L93 Difference]: Finished difference Result 2549 states and 3435 transitions. [2022-01-10 08:21:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-01-10 08:21:34,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:34,077 INFO L225 Difference]: With dead ends: 2549 [2022-01-10 08:21:34,077 INFO L226 Difference]: Without dead ends: 1765 [2022-01-10 08:21:34,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 08:21:34,082 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 66 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:34,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1288 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-01-10 08:21:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1737. [2022-01-10 08:21:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1394 states have (on average 1.3522238163558107) internal successors, (1885), 1433 states have internal predecessors, (1885), 173 states have call successors, (173), 120 states have call predecessors, (173), 168 states have return successors, (263), 188 states have call predecessors, (263), 169 states have call successors, (263) [2022-01-10 08:21:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2321 transitions. [2022-01-10 08:21:34,139 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2321 transitions. Word has length 66 [2022-01-10 08:21:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:34,140 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2321 transitions. [2022-01-10 08:21:34,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2321 transitions. [2022-01-10 08:21:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:21:34,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:34,141 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:34,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:34,352 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 08:21:34,353 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1035882595, now seen corresponding path program 1 times [2022-01-10 08:21:34,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117033114] [2022-01-10 08:21:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:34,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:34,355 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 08:21:34,356 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 08:21:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:34,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:34,576 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 08:21:34,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:34,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:34,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117033114] [2022-01-10 08:21:34,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117033114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:34,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:34,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:34,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621563899] [2022-01-10 08:21:34,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:34,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:34,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:34,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:34,583 INFO L87 Difference]: Start difference. First operand 1737 states and 2321 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:34,672 INFO L93 Difference]: Finished difference Result 4401 states and 5748 transitions. [2022-01-10 08:21:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-01-10 08:21:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:34,686 INFO L225 Difference]: With dead ends: 4401 [2022-01-10 08:21:34,686 INFO L226 Difference]: Without dead ends: 3021 [2022-01-10 08:21:34,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 08:21:34,715 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 589 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:34,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 775 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2022-01-10 08:21:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2961. [2022-01-10 08:21:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2332 states have (on average 1.3048885077186965) internal successors, (3043), 2405 states have internal predecessors, (3043), 305 states have call successors, (305), 232 states have call predecessors, (305), 322 states have return successors, (475), 328 states have call predecessors, (475), 301 states have call successors, (475) [2022-01-10 08:21:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 3823 transitions. [2022-01-10 08:21:34,809 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 3823 transitions. Word has length 66 [2022-01-10 08:21:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:34,809 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 3823 transitions. [2022-01-10 08:21:34,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 3823 transitions. [2022-01-10 08:21:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 08:21:34,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:34,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:34,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:35,020 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 08:21:35,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash 283948209, now seen corresponding path program 1 times [2022-01-10 08:21:35,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:35,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368785783] [2022-01-10 08:21:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:35,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:35,026 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 08:21:35,027 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 08:21:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:35,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:35,229 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 08:21:35,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:35,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:35,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368785783] [2022-01-10 08:21:35,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368785783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:35,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:35,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:35,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366219044] [2022-01-10 08:21:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:35,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:35,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:35,234 INFO L87 Difference]: Start difference. First operand 2961 states and 3823 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:35,337 INFO L93 Difference]: Finished difference Result 6173 states and 7837 transitions. [2022-01-10 08:21:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 72 [2022-01-10 08:21:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:35,354 INFO L225 Difference]: With dead ends: 6173 [2022-01-10 08:21:35,354 INFO L226 Difference]: Without dead ends: 3569 [2022-01-10 08:21:35,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 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 08:21:35,361 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 585 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:35,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 785 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2022-01-10 08:21:35,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3525. [2022-01-10 08:21:35,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 2768 states have (on average 1.2872109826589595) internal successors, (3563), 2849 states have internal predecessors, (3563), 369 states have call successors, (369), 288 states have call predecessors, (369), 386 states have return successors, (558), 392 states have call predecessors, (558), 365 states have call successors, (558) [2022-01-10 08:21:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 4490 transitions. [2022-01-10 08:21:35,531 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 4490 transitions. Word has length 72 [2022-01-10 08:21:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:35,532 INFO L470 AbstractCegarLoop]: Abstraction has 3525 states and 4490 transitions. [2022-01-10 08:21:35,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 4490 transitions. [2022-01-10 08:21:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 08:21:35,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:35,534 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:35,549 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 08:21:35,746 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 08:21:35,746 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:35,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:35,747 INFO L85 PathProgramCache]: Analyzing trace with hash -304350912, now seen corresponding path program 1 times [2022-01-10 08:21:35,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:35,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180038651] [2022-01-10 08:21:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:35,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:35,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:35,749 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 08:21:35,751 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 08:21:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:35,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:21:35,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:35,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:35,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180038651] [2022-01-10 08:21:35,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180038651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:35,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:35,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:35,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360771668] [2022-01-10 08:21:35,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:35,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:21:35,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:35,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:21:35,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:21:35,981 INFO L87 Difference]: Start difference. First operand 3525 states and 4490 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:36,235 INFO L93 Difference]: Finished difference Result 4205 states and 5323 transitions. [2022-01-10 08:21:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-01-10 08:21:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:36,253 INFO L225 Difference]: With dead ends: 4205 [2022-01-10 08:21:36,254 INFO L226 Difference]: Without dead ends: 4202 [2022-01-10 08:21:36,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:36,256 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1221 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:36,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 768 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:21:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2022-01-10 08:21:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 4160. [2022-01-10 08:21:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4160 states, 3258 states have (on average 1.278084714548803) internal successors, (4164), 3353 states have internal predecessors, (4164), 434 states have call successors, (434), 344 states have call predecessors, (434), 466 states have return successors, (661), 467 states have call predecessors, (661), 431 states have call successors, (661) [2022-01-10 08:21:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4160 states to 4160 states and 5259 transitions. [2022-01-10 08:21:36,410 INFO L78 Accepts]: Start accepts. Automaton has 4160 states and 5259 transitions. Word has length 73 [2022-01-10 08:21:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:36,410 INFO L470 AbstractCegarLoop]: Abstraction has 4160 states and 5259 transitions. [2022-01-10 08:21:36,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4160 states and 5259 transitions. [2022-01-10 08:21:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 08:21:36,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:36,412 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:36,427 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 08:21:36,621 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 08:21:36,621 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash -846258469, now seen corresponding path program 1 times [2022-01-10 08:21:36,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:36,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371423054] [2022-01-10 08:21:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:36,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:36,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:36,624 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 08:21:36,626 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 08:21:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:36,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:21:36,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:21:37,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:21:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:21:37,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371423054] [2022-01-10 08:21:37,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371423054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:21:37,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:21:37,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2022-01-10 08:21:37,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582171394] [2022-01-10 08:21:37,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:21:37,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 08:21:37,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 08:21:37,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:21:37,257 INFO L87 Difference]: Start difference. First operand 4160 states and 5259 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 08:21:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:37,785 INFO L93 Difference]: Finished difference Result 9143 states and 11459 transitions. [2022-01-10 08:21:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:21:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 74 [2022-01-10 08:21:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:37,826 INFO L225 Difference]: With dead ends: 9143 [2022-01-10 08:21:37,827 INFO L226 Difference]: Without dead ends: 9140 [2022-01-10 08:21:37,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:21:37,832 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 1656 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1656 SdHoareTripleChecker+Valid, 2398 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:37,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1656 Valid, 2398 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9140 states. [2022-01-10 08:21:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9140 to 6742. [2022-01-10 08:21:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 5260 states have (on average 1.2684410646387834) internal successors, (6672), 5421 states have internal predecessors, (6672), 698 states have call successors, (698), 568 states have call predecessors, (698), 782 states have return successors, (1095), 757 states have call predecessors, (1095), 695 states have call successors, (1095) [2022-01-10 08:21:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 8465 transitions. [2022-01-10 08:21:38,168 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 8465 transitions. Word has length 74 [2022-01-10 08:21:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:38,169 INFO L470 AbstractCegarLoop]: Abstraction has 6742 states and 8465 transitions. [2022-01-10 08:21:38,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 08:21:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 8465 transitions. [2022-01-10 08:21:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 08:21:38,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:38,171 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:38,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:38,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:38,381 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -931904896, now seen corresponding path program 2 times [2022-01-10 08:21:38,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:38,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749449221] [2022-01-10 08:21:38,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:21:38,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:38,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:38,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:38,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 08:21:38,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:21:38,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:21:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:38,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:21:38,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:38,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:38,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749449221] [2022-01-10 08:21:38,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749449221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:38,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:38,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:38,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704400973] [2022-01-10 08:21:38,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:38,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:38,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:38,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:38,617 INFO L87 Difference]: Start difference. First operand 6742 states and 8465 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:38,791 INFO L93 Difference]: Finished difference Result 9989 states and 12597 transitions. [2022-01-10 08:21:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:38,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2022-01-10 08:21:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:38,808 INFO L225 Difference]: With dead ends: 9989 [2022-01-10 08:21:38,808 INFO L226 Difference]: Without dead ends: 4178 [2022-01-10 08:21:38,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 08:21:38,819 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 625 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:38,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 848 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2022-01-10 08:21:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 4146. [2022-01-10 08:21:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4146 states, 3248 states have (on average 1.2641625615763548) internal successors, (4106), 3339 states have internal predecessors, (4106), 434 states have call successors, (434), 344 states have call predecessors, (434), 462 states have return successors, (629), 467 states have call predecessors, (629), 431 states have call successors, (629) [2022-01-10 08:21:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4146 states to 4146 states and 5169 transitions. [2022-01-10 08:21:38,991 INFO L78 Accepts]: Start accepts. Automaton has 4146 states and 5169 transitions. Word has length 77 [2022-01-10 08:21:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:38,992 INFO L470 AbstractCegarLoop]: Abstraction has 4146 states and 5169 transitions. [2022-01-10 08:21:38,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:21:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4146 states and 5169 transitions. [2022-01-10 08:21:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 08:21:38,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:38,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:39,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:39,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:39,204 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -840062387, now seen corresponding path program 1 times [2022-01-10 08:21:39,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:39,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199238195] [2022-01-10 08:21:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:39,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:39,206 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:39,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 08:21:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:39,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:21:39,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:39,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:39,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199238195] [2022-01-10 08:21:39,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199238195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:39,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:39,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404720234] [2022-01-10 08:21:39,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:39,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:39,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:39,416 INFO L87 Difference]: Start difference. First operand 4146 states and 5169 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:21:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:39,662 INFO L93 Difference]: Finished difference Result 11169 states and 13714 transitions. [2022-01-10 08:21:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2022-01-10 08:21:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:39,687 INFO L225 Difference]: With dead ends: 11169 [2022-01-10 08:21:39,687 INFO L226 Difference]: Without dead ends: 5946 [2022-01-10 08:21:39,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 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 08:21:39,699 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 89 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:39,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1389 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2022-01-10 08:21:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 5946. [2022-01-10 08:21:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5946 states, 4610 states have (on average 1.242299349240781) internal successors, (5727), 4746 states have internal predecessors, (5727), 632 states have call successors, (632), 512 states have call predecessors, (632), 702 states have return successors, (953), 692 states have call predecessors, (953), 629 states have call successors, (953) [2022-01-10 08:21:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5946 states to 5946 states and 7312 transitions. [2022-01-10 08:21:39,974 INFO L78 Accepts]: Start accepts. Automaton has 5946 states and 7312 transitions. Word has length 84 [2022-01-10 08:21:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:39,974 INFO L470 AbstractCegarLoop]: Abstraction has 5946 states and 7312 transitions. [2022-01-10 08:21:39,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:21:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5946 states and 7312 transitions. [2022-01-10 08:21:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 08:21:39,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:39,979 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:39,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:40,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:40,189 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:40,190 INFO L85 PathProgramCache]: Analyzing trace with hash 315750929, now seen corresponding path program 1 times [2022-01-10 08:21:40,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:40,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438261909] [2022-01-10 08:21:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:40,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:40,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:40,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:40,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 08:21:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:40,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:40,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:21:40,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:40,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438261909] [2022-01-10 08:21:40,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438261909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:40,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:40,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:40,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327753188] [2022-01-10 08:21:40,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:40,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:21:40,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:21:40,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:21:40,437 INFO L87 Difference]: Start difference. First operand 5946 states and 7312 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:21:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:40,864 INFO L93 Difference]: Finished difference Result 11561 states and 14112 transitions. [2022-01-10 08:21:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:21:40,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2022-01-10 08:21:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:40,905 INFO L225 Difference]: With dead ends: 11561 [2022-01-10 08:21:40,905 INFO L226 Difference]: Without dead ends: 5976 [2022-01-10 08:21:40,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:40,920 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 880 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:40,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 979 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:21:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2022-01-10 08:21:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5976. [2022-01-10 08:21:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 4625 states have (on average 1.2272432432432432) internal successors, (5676), 4776 states have internal predecessors, (5676), 632 states have call successors, (632), 512 states have call predecessors, (632), 717 states have return successors, (953), 692 states have call predecessors, (953), 629 states have call successors, (953) [2022-01-10 08:21:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 7261 transitions. [2022-01-10 08:21:41,186 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 7261 transitions. Word has length 92 [2022-01-10 08:21:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:41,187 INFO L470 AbstractCegarLoop]: Abstraction has 5976 states and 7261 transitions. [2022-01-10 08:21:41,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:21:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 7261 transitions. [2022-01-10 08:21:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 08:21:41,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:41,190 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:41,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:41,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:41,400 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 670528542, now seen corresponding path program 1 times [2022-01-10 08:21:41,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:41,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127952704] [2022-01-10 08:21:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:41,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:41,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:41,402 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:41,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 08:21:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:21:41,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:41,604 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:41,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127952704] [2022-01-10 08:21:41,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127952704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:41,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:41,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:41,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486448887] [2022-01-10 08:21:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:41,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:41,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:41,606 INFO L87 Difference]: Start difference. First operand 5976 states and 7261 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:21:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:41,819 INFO L93 Difference]: Finished difference Result 11328 states and 13645 transitions. [2022-01-10 08:21:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:41,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2022-01-10 08:21:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:41,835 INFO L225 Difference]: With dead ends: 11328 [2022-01-10 08:21:41,835 INFO L226 Difference]: Without dead ends: 5703 [2022-01-10 08:21:41,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 08:21:41,843 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 102 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:41,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1379 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2022-01-10 08:21:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5700. [2022-01-10 08:21:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 4419 states have (on average 1.2165648336727766) internal successors, (5376), 4564 states have internal predecessors, (5376), 594 states have call successors, (594), 484 states have call predecessors, (594), 685 states have return successors, (836), 654 states have call predecessors, (836), 591 states have call successors, (836) [2022-01-10 08:21:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 6806 transitions. [2022-01-10 08:21:42,043 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 6806 transitions. Word has length 93 [2022-01-10 08:21:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:42,044 INFO L470 AbstractCegarLoop]: Abstraction has 5700 states and 6806 transitions. [2022-01-10 08:21:42,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:21:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 6806 transitions. [2022-01-10 08:21:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 08:21:42,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:42,050 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:42,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:42,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:42,259 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 841732582, now seen corresponding path program 1 times [2022-01-10 08:21:42,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:42,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774192707] [2022-01-10 08:21:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:42,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:42,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:42,261 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:42,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 08:21:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:42,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-10 08:21:42,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:42,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:42,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774192707] [2022-01-10 08:21:42,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774192707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:42,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:42,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:42,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998957569] [2022-01-10 08:21:42,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:42,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:42,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:42,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:42,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:42,593 INFO L87 Difference]: Start difference. First operand 5700 states and 6806 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 08:21:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:43,482 INFO L93 Difference]: Finished difference Result 13609 states and 16150 transitions. [2022-01-10 08:21:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:21:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 159 [2022-01-10 08:21:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:43,511 INFO L225 Difference]: With dead ends: 13609 [2022-01-10 08:21:43,512 INFO L226 Difference]: Without dead ends: 8040 [2022-01-10 08:21:43,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:21:43,529 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 916 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:43,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 1295 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 08:21:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8040 states. [2022-01-10 08:21:43,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8040 to 7687. [2022-01-10 08:21:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 5917 states have (on average 1.210917694777759) internal successors, (7165), 6098 states have internal predecessors, (7165), 814 states have call successors, (814), 673 states have call predecessors, (814), 954 states have return successors, (1130), 917 states have call predecessors, (1130), 811 states have call successors, (1130) [2022-01-10 08:21:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 9109 transitions. [2022-01-10 08:21:43,891 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 9109 transitions. Word has length 159 [2022-01-10 08:21:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:43,892 INFO L470 AbstractCegarLoop]: Abstraction has 7687 states and 9109 transitions. [2022-01-10 08:21:43,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 08:21:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 9109 transitions. [2022-01-10 08:21:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:43,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:43,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:43,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:44,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:44,106 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:44,107 INFO L85 PathProgramCache]: Analyzing trace with hash 451963073, now seen corresponding path program 1 times [2022-01-10 08:21:44,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:44,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753862983] [2022-01-10 08:21:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:44,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:44,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:44,109 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:44,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 08:21:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:44,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:44,432 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 08:21:44,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:44,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:44,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753862983] [2022-01-10 08:21:44,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753862983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:44,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:44,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:44,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806611053] [2022-01-10 08:21:44,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:44,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:44,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:44,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:44,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:44,434 INFO L87 Difference]: Start difference. First operand 7687 states and 9109 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:44,673 INFO L93 Difference]: Finished difference Result 8011 states and 9618 transitions. [2022-01-10 08:21:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:44,690 INFO L225 Difference]: With dead ends: 8011 [2022-01-10 08:21:44,690 INFO L226 Difference]: Without dead ends: 7687 [2022-01-10 08:21:44,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 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 08:21:44,694 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 513 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:44,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 779 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7687 states. [2022-01-10 08:21:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7687 to 7687. [2022-01-10 08:21:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 5917 states have (on average 1.2107486902146358) internal successors, (7164), 6098 states have internal predecessors, (7164), 814 states have call successors, (814), 673 states have call predecessors, (814), 954 states have return successors, (1130), 917 states have call predecessors, (1130), 811 states have call successors, (1130) [2022-01-10 08:21:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 9108 transitions. [2022-01-10 08:21:45,007 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 9108 transitions. Word has length 157 [2022-01-10 08:21:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:45,008 INFO L470 AbstractCegarLoop]: Abstraction has 7687 states and 9108 transitions. [2022-01-10 08:21:45,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 9108 transitions. [2022-01-10 08:21:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:45,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:45,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:45,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:45,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:45,223 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:45,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1445016385, now seen corresponding path program 1 times [2022-01-10 08:21:45,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:45,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115772721] [2022-01-10 08:21:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:45,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:45,225 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:45,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 08:21:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:45,570 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 08:21:45,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:45,571 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115772721] [2022-01-10 08:21:45,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115772721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:45,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:45,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:45,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964452527] [2022-01-10 08:21:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:45,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:45,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:45,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:45,572 INFO L87 Difference]: Start difference. First operand 7687 states and 9108 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:46,447 INFO L93 Difference]: Finished difference Result 8359 states and 10178 transitions. [2022-01-10 08:21:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:21:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:46,469 INFO L225 Difference]: With dead ends: 8359 [2022-01-10 08:21:46,469 INFO L226 Difference]: Without dead ends: 8043 [2022-01-10 08:21:46,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:46,473 INFO L933 BasicCegarLoop]: 725 mSDtfsCounter, 1156 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1957 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:46,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 1957 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 08:21:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8043 states. [2022-01-10 08:21:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8043 to 8016. [2022-01-10 08:21:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.229581993569132) internal successors, (7648), 6402 states have internal predecessors, (7648), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9631 transitions. [2022-01-10 08:21:46,896 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9631 transitions. Word has length 157 [2022-01-10 08:21:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:46,896 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9631 transitions. [2022-01-10 08:21:46,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9631 transitions. [2022-01-10 08:21:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:46,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:46,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:46,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:47,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:47,112 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash -778981189, now seen corresponding path program 1 times [2022-01-10 08:21:47,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:47,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321537449] [2022-01-10 08:21:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:47,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:47,114 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:47,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 08:21:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:47,460 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 08:21:47,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:47,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:47,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321537449] [2022-01-10 08:21:47,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321537449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:47,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:47,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:47,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323510337] [2022-01-10 08:21:47,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:47,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:47,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:47,464 INFO L87 Difference]: Start difference. First operand 8016 states and 9631 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:48,080 INFO L93 Difference]: Finished difference Result 8661 states and 10655 transitions. [2022-01-10 08:21:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:48,098 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:21:48,098 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:21:48,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:48,101 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 868 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:48,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 1285 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:21:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:21:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:21:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.2284565916398713) internal successors, (7641), 6402 states have internal predecessors, (7641), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9624 transitions. [2022-01-10 08:21:48,444 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9624 transitions. Word has length 157 [2022-01-10 08:21:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:48,444 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9624 transitions. [2022-01-10 08:21:48,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9624 transitions. [2022-01-10 08:21:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:48,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:48,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:48,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:48,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:48,662 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:48,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1043619135, now seen corresponding path program 1 times [2022-01-10 08:21:48,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:48,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247601989] [2022-01-10 08:21:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:48,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:48,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:48,664 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:48,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 08:21:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:48,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:48,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:48,975 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 08:21:48,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:48,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:48,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247601989] [2022-01-10 08:21:48,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247601989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:48,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:48,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:48,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649937081] [2022-01-10 08:21:48,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:48,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:48,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:48,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:48,977 INFO L87 Difference]: Start difference. First operand 8016 states and 9624 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:49,524 INFO L93 Difference]: Finished difference Result 8661 states and 10641 transitions. [2022-01-10 08:21:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:49,548 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:21:49,548 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:21:49,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:49,553 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 862 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:49,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 1278 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:21:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:21:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.227331189710611) internal successors, (7634), 6402 states have internal predecessors, (7634), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9617 transitions. [2022-01-10 08:21:49,945 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9617 transitions. Word has length 157 [2022-01-10 08:21:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:49,946 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9617 transitions. [2022-01-10 08:21:49,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9617 transitions. [2022-01-10 08:21:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:49,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:49,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:49,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:50,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:50,162 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:50,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1945628613, now seen corresponding path program 1 times [2022-01-10 08:21:50,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:50,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162463797] [2022-01-10 08:21:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:50,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:50,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:50,165 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:50,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 08:21:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:50,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:50,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:50,545 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 08:21:50,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:50,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:50,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162463797] [2022-01-10 08:21:50,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162463797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:50,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:50,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:50,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180519518] [2022-01-10 08:21:50,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:50,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:50,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:50,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:50,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:50,547 INFO L87 Difference]: Start difference. First operand 8016 states and 9617 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:51,082 INFO L93 Difference]: Finished difference Result 8661 states and 10627 transitions. [2022-01-10 08:21:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:51,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:51,104 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:21:51,104 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:21:51,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:51,109 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 856 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:51,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1271 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:21:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:21:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.2262057877813506) internal successors, (7627), 6402 states have internal predecessors, (7627), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9610 transitions. [2022-01-10 08:21:51,583 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9610 transitions. Word has length 157 [2022-01-10 08:21:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:51,583 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9610 transitions. [2022-01-10 08:21:51,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9610 transitions. [2022-01-10 08:21:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:51,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:51,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:51,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-01-10 08:21:51,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:51,797 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1582162115, now seen corresponding path program 1 times [2022-01-10 08:21:51,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:51,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538377405] [2022-01-10 08:21:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:51,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:51,799 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:51,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 08:21:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:51,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:51,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:52,127 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 08:21:52,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:52,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:52,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538377405] [2022-01-10 08:21:52,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538377405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:52,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:52,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:52,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071033664] [2022-01-10 08:21:52,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:52,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:52,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:52,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:52,131 INFO L87 Difference]: Start difference. First operand 8016 states and 9610 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:52,687 INFO L93 Difference]: Finished difference Result 8661 states and 10613 transitions. [2022-01-10 08:21:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:52,705 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:21:52,705 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:21:52,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:52,709 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 850 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:52,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1264 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:21:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:21:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.22508038585209) internal successors, (7620), 6402 states have internal predecessors, (7620), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:53,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9603 transitions. [2022-01-10 08:21:53,103 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9603 transitions. Word has length 157 [2022-01-10 08:21:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:53,103 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9603 transitions. [2022-01-10 08:21:53,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:53,103 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9603 transitions. [2022-01-10 08:21:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:53,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:53,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:53,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:53,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:53,317 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1972265273, now seen corresponding path program 1 times [2022-01-10 08:21:53,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:53,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039382999] [2022-01-10 08:21:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:53,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:53,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:53,319 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:53,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 08:21:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:53,642 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 08:21:53,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:53,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039382999] [2022-01-10 08:21:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039382999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:53,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:53,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:53,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449335995] [2022-01-10 08:21:53,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:53,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:53,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:53,644 INFO L87 Difference]: Start difference. First operand 8016 states and 9603 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:54,346 INFO L93 Difference]: Finished difference Result 8661 states and 10599 transitions. [2022-01-10 08:21:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:54,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:54,367 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:21:54,367 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:21:54,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:54,373 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 844 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:54,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 1257 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:21:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:21:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.2239549839228296) internal successors, (7613), 6402 states have internal predecessors, (7613), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9596 transitions. [2022-01-10 08:21:54,813 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9596 transitions. Word has length 157 [2022-01-10 08:21:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:54,813 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9596 transitions. [2022-01-10 08:21:54,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:54,813 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9596 transitions. [2022-01-10 08:21:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:54,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:54,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:54,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:55,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:55,027 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2086924221, now seen corresponding path program 1 times [2022-01-10 08:21:55,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:55,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362168358] [2022-01-10 08:21:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:55,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:55,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:55,029 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:55,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 08:21:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:55,344 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 08:21:55,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:55,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362168358] [2022-01-10 08:21:55,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362168358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:55,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:55,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:55,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629482440] [2022-01-10 08:21:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:55,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:55,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:55,345 INFO L87 Difference]: Start difference. First operand 8016 states and 9596 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:55,934 INFO L93 Difference]: Finished difference Result 8661 states and 10585 transitions. [2022-01-10 08:21:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:55,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:55,950 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:21:55,950 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:21:55,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:55,955 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 837 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:55,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1250 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:21:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:21:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.222829581993569) internal successors, (7606), 6402 states have internal predecessors, (7606), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9589 transitions. [2022-01-10 08:21:56,390 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9589 transitions. Word has length 157 [2022-01-10 08:21:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:56,390 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9589 transitions. [2022-01-10 08:21:56,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9589 transitions. [2022-01-10 08:21:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:56,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:56,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:56,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 08:21:56,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:56,595 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 294866753, now seen corresponding path program 1 times [2022-01-10 08:21:56,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:56,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281523293] [2022-01-10 08:21:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:56,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:56,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:56,597 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:56,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 08:21:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:56,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:56,908 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 08:21:56,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:56,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281523293] [2022-01-10 08:21:56,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281523293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:56,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:56,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:56,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586732408] [2022-01-10 08:21:56,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:56,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:56,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:56,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:56,910 INFO L87 Difference]: Start difference. First operand 8016 states and 9589 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:57,555 INFO L93 Difference]: Finished difference Result 8661 states and 10571 transitions. [2022-01-10 08:21:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:57,569 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:21:57,569 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:21:57,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:57,572 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 831 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:57,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 1243 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:21:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:21:57,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.2217041800643087) internal successors, (7599), 6402 states have internal predecessors, (7599), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9582 transitions. [2022-01-10 08:21:57,925 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9582 transitions. Word has length 157 [2022-01-10 08:21:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:57,925 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9582 transitions. [2022-01-10 08:21:57,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9582 transitions. [2022-01-10 08:21:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:57,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:57,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:57,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:58,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:58,138 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1761079101, now seen corresponding path program 1 times [2022-01-10 08:21:58,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:58,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71781608] [2022-01-10 08:21:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:58,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:58,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:58,140 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:58,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 08:21:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:58,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:58,495 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 08:21:58,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:58,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71781608] [2022-01-10 08:21:58,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71781608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:58,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:58,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:58,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109013704] [2022-01-10 08:21:58,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:58,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:58,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:58,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:58,497 INFO L87 Difference]: Start difference. First operand 8016 states and 9582 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:59,123 INFO L93 Difference]: Finished difference Result 8661 states and 10557 transitions. [2022-01-10 08:21:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:21:59,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:21:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:59,137 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:21:59,137 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:21:59,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:59,139 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 825 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:59,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1236 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:21:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:21:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.2205787781350483) internal successors, (7592), 6402 states have internal predecessors, (7592), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:21:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9575 transitions. [2022-01-10 08:21:59,506 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9575 transitions. Word has length 157 [2022-01-10 08:21:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:59,506 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9575 transitions. [2022-01-10 08:21:59,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:21:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9575 transitions. [2022-01-10 08:21:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:21:59,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:59,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:59,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 08:21:59,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:21:59,710 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1254186945, now seen corresponding path program 1 times [2022-01-10 08:21:59,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:59,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557980939] [2022-01-10 08:21:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:59,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:59,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:59,712 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:21:59,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 08:21:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:59,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:59,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:00,038 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 08:22:00,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:00,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557980939] [2022-01-10 08:22:00,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557980939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:00,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:00,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:00,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056222509] [2022-01-10 08:22:00,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:00,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:00,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:00,040 INFO L87 Difference]: Start difference. First operand 8016 states and 9575 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:00,706 INFO L93 Difference]: Finished difference Result 8661 states and 10543 transitions. [2022-01-10 08:22:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:22:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:00,719 INFO L225 Difference]: With dead ends: 8661 [2022-01-10 08:22:00,720 INFO L226 Difference]: Without dead ends: 8016 [2022-01-10 08:22:00,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:00,722 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 819 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:00,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1229 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:22:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2022-01-10 08:22:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2022-01-10 08:22:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6220 states have (on average 1.2194533762057878) internal successors, (7585), 6402 states have internal predecessors, (7585), 833 states have call successors, (833), 679 states have call predecessors, (833), 961 states have return successors, (1150), 936 states have call predecessors, (1150), 830 states have call successors, (1150) [2022-01-10 08:22:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 9568 transitions. [2022-01-10 08:22:01,179 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 9568 transitions. Word has length 157 [2022-01-10 08:22:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:01,179 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 9568 transitions. [2022-01-10 08:22:01,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 9568 transitions. [2022-01-10 08:22:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:01,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:01,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:01,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:01,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:01,383 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:01,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1099288253, now seen corresponding path program 1 times [2022-01-10 08:22:01,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:01,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210478366] [2022-01-10 08:22:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:01,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:01,385 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:01,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 08:22:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:01,728 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 08:22:01,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:01,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210478366] [2022-01-10 08:22:01,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210478366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:01,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:01,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:01,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120856256] [2022-01-10 08:22:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:01,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:01,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:01,731 INFO L87 Difference]: Start difference. First operand 8016 states and 9568 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:02,493 INFO L93 Difference]: Finished difference Result 8825 states and 10783 transitions. [2022-01-10 08:22:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:02,511 INFO L225 Difference]: With dead ends: 8825 [2022-01-10 08:22:02,511 INFO L226 Difference]: Without dead ends: 8180 [2022-01-10 08:22:02,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:02,515 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 919 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:02,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 1221 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8180 states. [2022-01-10 08:22:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8180 to 8180. [2022-01-10 08:22:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8180 states, 6378 states have (on average 1.2229539040451551) internal successors, (7800), 6560 states have internal predecessors, (7800), 835 states have call successors, (835), 683 states have call predecessors, (835), 965 states have return successors, (1152), 938 states have call predecessors, (1152), 832 states have call successors, (1152) [2022-01-10 08:22:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8180 states to 8180 states and 9787 transitions. [2022-01-10 08:22:02,994 INFO L78 Accepts]: Start accepts. Automaton has 8180 states and 9787 transitions. Word has length 157 [2022-01-10 08:22:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:02,994 INFO L470 AbstractCegarLoop]: Abstraction has 8180 states and 9787 transitions. [2022-01-10 08:22:02,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 8180 states and 9787 transitions. [2022-01-10 08:22:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:02,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:02,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:03,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:03,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:03,198 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash 392691647, now seen corresponding path program 1 times [2022-01-10 08:22:03,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:03,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817177296] [2022-01-10 08:22:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:03,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:03,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:03,199 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:03,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 08:22:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:03,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:03,526 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 08:22:03,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:03,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:03,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817177296] [2022-01-10 08:22:03,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817177296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:03,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:03,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:03,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534199123] [2022-01-10 08:22:03,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:03,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:03,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:03,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:03,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:03,527 INFO L87 Difference]: Start difference. First operand 8180 states and 9787 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:04,361 INFO L93 Difference]: Finished difference Result 9153 states and 11221 transitions. [2022-01-10 08:22:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:04,372 INFO L225 Difference]: With dead ends: 9153 [2022-01-10 08:22:04,373 INFO L226 Difference]: Without dead ends: 8344 [2022-01-10 08:22:04,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:04,375 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 912 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:04,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 1215 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8344 states. [2022-01-10 08:22:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8344 to 8344. [2022-01-10 08:22:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8344 states, 6536 states have (on average 1.225673194614443) internal successors, (8011), 6718 states have internal predecessors, (8011), 837 states have call successors, (837), 687 states have call predecessors, (837), 969 states have return successors, (1154), 940 states have call predecessors, (1154), 834 states have call successors, (1154) [2022-01-10 08:22:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8344 states to 8344 states and 10002 transitions. [2022-01-10 08:22:04,742 INFO L78 Accepts]: Start accepts. Automaton has 8344 states and 10002 transitions. Word has length 157 [2022-01-10 08:22:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:04,742 INFO L470 AbstractCegarLoop]: Abstraction has 8344 states and 10002 transitions. [2022-01-10 08:22:04,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 8344 states and 10002 transitions. [2022-01-10 08:22:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:04,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:04,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:04,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:04,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:04,955 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 124708698, now seen corresponding path program 1 times [2022-01-10 08:22:04,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:04,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323398022] [2022-01-10 08:22:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:04,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:04,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:04,957 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:04,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 08:22:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:05,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:05,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:05,268 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 08:22:05,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:05,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:05,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323398022] [2022-01-10 08:22:05,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323398022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:05,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:05,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:05,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442217193] [2022-01-10 08:22:05,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:05,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:05,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:05,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:05,270 INFO L87 Difference]: Start difference. First operand 8344 states and 10002 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:06,066 INFO L93 Difference]: Finished difference Result 9481 states and 11651 transitions. [2022-01-10 08:22:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:06,080 INFO L225 Difference]: With dead ends: 9481 [2022-01-10 08:22:06,081 INFO L226 Difference]: Without dead ends: 8508 [2022-01-10 08:22:06,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:06,084 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 906 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:06,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 1206 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8508 states. [2022-01-10 08:22:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8508 to 8508. [2022-01-10 08:22:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 6694 states have (on average 1.2276665670749924) internal successors, (8218), 6876 states have internal predecessors, (8218), 839 states have call successors, (839), 691 states have call predecessors, (839), 973 states have return successors, (1156), 942 states have call predecessors, (1156), 836 states have call successors, (1156) [2022-01-10 08:22:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 10213 transitions. [2022-01-10 08:22:06,510 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 10213 transitions. Word has length 157 [2022-01-10 08:22:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:06,510 INFO L470 AbstractCegarLoop]: Abstraction has 8508 states and 10213 transitions. [2022-01-10 08:22:06,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 10213 transitions. [2022-01-10 08:22:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:06,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:06,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:06,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:06,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:06,724 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1922221602, now seen corresponding path program 1 times [2022-01-10 08:22:06,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:06,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564027739] [2022-01-10 08:22:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:06,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:06,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:06,726 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:06,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 08:22:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:06,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:06,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:07,025 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 08:22:07,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:07,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564027739] [2022-01-10 08:22:07,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564027739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:07,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:07,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:07,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420234986] [2022-01-10 08:22:07,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:07,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:07,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:07,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:07,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:07,026 INFO L87 Difference]: Start difference. First operand 8508 states and 10213 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:07,805 INFO L93 Difference]: Finished difference Result 9809 states and 12073 transitions. [2022-01-10 08:22:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:07,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:07,826 INFO L225 Difference]: With dead ends: 9809 [2022-01-10 08:22:07,827 INFO L226 Difference]: Without dead ends: 8672 [2022-01-10 08:22:07,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:07,832 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 898 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:07,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 1199 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8672 states. [2022-01-10 08:22:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8672 to 8672. [2022-01-10 08:22:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8672 states, 6852 states have (on average 1.228984238178634) internal successors, (8421), 7034 states have internal predecessors, (8421), 841 states have call successors, (841), 695 states have call predecessors, (841), 977 states have return successors, (1158), 944 states have call predecessors, (1158), 838 states have call successors, (1158) [2022-01-10 08:22:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8672 states to 8672 states and 10420 transitions. [2022-01-10 08:22:08,295 INFO L78 Accepts]: Start accepts. Automaton has 8672 states and 10420 transitions. Word has length 157 [2022-01-10 08:22:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:08,295 INFO L470 AbstractCegarLoop]: Abstraction has 8672 states and 10420 transitions. [2022-01-10 08:22:08,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8672 states and 10420 transitions. [2022-01-10 08:22:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:08,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:08,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:08,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:08,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:08,509 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:08,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1410973889, now seen corresponding path program 1 times [2022-01-10 08:22:08,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:08,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166552212] [2022-01-10 08:22:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:08,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:08,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:08,511 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:08,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 08:22:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:08,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:08,819 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 08:22:08,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:08,819 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:08,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166552212] [2022-01-10 08:22:08,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166552212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:08,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:08,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:08,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114345425] [2022-01-10 08:22:08,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:08,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:08,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:08,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:08,821 INFO L87 Difference]: Start difference. First operand 8672 states and 10420 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:09,664 INFO L93 Difference]: Finished difference Result 10137 states and 12487 transitions. [2022-01-10 08:22:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:09,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:09,677 INFO L225 Difference]: With dead ends: 10137 [2022-01-10 08:22:09,677 INFO L226 Difference]: Without dead ends: 8836 [2022-01-10 08:22:09,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:09,680 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 891 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:09,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 1192 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2022-01-10 08:22:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 8836. [2022-01-10 08:22:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8836 states, 7010 states have (on average 1.2296718972895864) internal successors, (8620), 7192 states have internal predecessors, (8620), 843 states have call successors, (843), 699 states have call predecessors, (843), 981 states have return successors, (1160), 946 states have call predecessors, (1160), 840 states have call successors, (1160) [2022-01-10 08:22:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8836 states to 8836 states and 10623 transitions. [2022-01-10 08:22:10,101 INFO L78 Accepts]: Start accepts. Automaton has 8836 states and 10623 transitions. Word has length 157 [2022-01-10 08:22:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:10,101 INFO L470 AbstractCegarLoop]: Abstraction has 8836 states and 10623 transitions. [2022-01-10 08:22:10,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8836 states and 10623 transitions. [2022-01-10 08:22:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:10,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:10,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:10,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 08:22:10,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:10,341 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:10,342 INFO L85 PathProgramCache]: Analyzing trace with hash 380378301, now seen corresponding path program 1 times [2022-01-10 08:22:10,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:10,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788951740] [2022-01-10 08:22:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:10,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:10,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:10,343 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:10,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 08:22:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:10,645 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 08:22:10,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:10,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:10,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788951740] [2022-01-10 08:22:10,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788951740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:10,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:10,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:10,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021428782] [2022-01-10 08:22:10,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:10,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:10,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:10,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:10,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:10,646 INFO L87 Difference]: Start difference. First operand 8836 states and 10623 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:11,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:11,451 INFO L93 Difference]: Finished difference Result 10465 states and 12893 transitions. [2022-01-10 08:22:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:11,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:11,465 INFO L225 Difference]: With dead ends: 10465 [2022-01-10 08:22:11,465 INFO L226 Difference]: Without dead ends: 9000 [2022-01-10 08:22:11,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:11,469 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 884 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:11,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 1185 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2022-01-10 08:22:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 9000. [2022-01-10 08:22:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9000 states, 7168 states have (on average 1.2297712053571428) internal successors, (8815), 7350 states have internal predecessors, (8815), 845 states have call successors, (845), 703 states have call predecessors, (845), 985 states have return successors, (1162), 948 states have call predecessors, (1162), 842 states have call successors, (1162) [2022-01-10 08:22:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9000 states to 9000 states and 10822 transitions. [2022-01-10 08:22:11,950 INFO L78 Accepts]: Start accepts. Automaton has 9000 states and 10822 transitions. Word has length 157 [2022-01-10 08:22:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:11,951 INFO L470 AbstractCegarLoop]: Abstraction has 9000 states and 10822 transitions. [2022-01-10 08:22:11,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9000 states and 10822 transitions. [2022-01-10 08:22:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:11,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:11,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:11,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:12,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:12,164 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash 905874208, now seen corresponding path program 1 times [2022-01-10 08:22:12,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:12,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288825246] [2022-01-10 08:22:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:12,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:12,166 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:12,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 08:22:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:12,508 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 08:22:12,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:12,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288825246] [2022-01-10 08:22:12,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288825246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:12,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:12,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:12,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219286946] [2022-01-10 08:22:12,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:12,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:12,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:12,510 INFO L87 Difference]: Start difference. First operand 9000 states and 10822 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:13,497 INFO L93 Difference]: Finished difference Result 10793 states and 13291 transitions. [2022-01-10 08:22:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:13,512 INFO L225 Difference]: With dead ends: 10793 [2022-01-10 08:22:13,512 INFO L226 Difference]: Without dead ends: 9164 [2022-01-10 08:22:13,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:13,516 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 877 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:13,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1178 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:13,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9164 states. [2022-01-10 08:22:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9164 to 9164. [2022-01-10 08:22:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9164 states, 7326 states have (on average 1.2293202293202292) internal successors, (9006), 7508 states have internal predecessors, (9006), 847 states have call successors, (847), 707 states have call predecessors, (847), 989 states have return successors, (1164), 950 states have call predecessors, (1164), 844 states have call successors, (1164) [2022-01-10 08:22:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9164 states to 9164 states and 11017 transitions. [2022-01-10 08:22:14,047 INFO L78 Accepts]: Start accepts. Automaton has 9164 states and 11017 transitions. Word has length 157 [2022-01-10 08:22:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:14,047 INFO L470 AbstractCegarLoop]: Abstraction has 9164 states and 11017 transitions. [2022-01-10 08:22:14,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 9164 states and 11017 transitions. [2022-01-10 08:22:14,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:14,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:14,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:14,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 08:22:14,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:14,250 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1070615012, now seen corresponding path program 1 times [2022-01-10 08:22:14,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:14,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283802632] [2022-01-10 08:22:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:14,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:14,252 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:14,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 08:22:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:14,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:14,555 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 08:22:14,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:14,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:14,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283802632] [2022-01-10 08:22:14,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283802632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:14,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:14,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:14,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133782154] [2022-01-10 08:22:14,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:14,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:14,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:14,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:14,557 INFO L87 Difference]: Start difference. First operand 9164 states and 11017 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:15,480 INFO L93 Difference]: Finished difference Result 11121 states and 13681 transitions. [2022-01-10 08:22:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:15,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:15,498 INFO L225 Difference]: With dead ends: 11121 [2022-01-10 08:22:15,498 INFO L226 Difference]: Without dead ends: 9328 [2022-01-10 08:22:15,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:15,504 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 870 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:15,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 1171 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-01-10 08:22:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-01-10 08:22:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 7484 states have (on average 1.2283538214858365) internal successors, (9193), 7666 states have internal predecessors, (9193), 849 states have call successors, (849), 711 states have call predecessors, (849), 993 states have return successors, (1166), 952 states have call predecessors, (1166), 846 states have call successors, (1166) [2022-01-10 08:22:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 11208 transitions. [2022-01-10 08:22:16,033 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 11208 transitions. Word has length 157 [2022-01-10 08:22:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:16,033 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 11208 transitions. [2022-01-10 08:22:16,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 11208 transitions. [2022-01-10 08:22:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:16,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:16,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:16,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-01-10 08:22:16,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:16,236 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -972891779, now seen corresponding path program 1 times [2022-01-10 08:22:16,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:16,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901048966] [2022-01-10 08:22:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:16,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:16,238 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:16,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 08:22:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:16,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:16,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:16,542 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 08:22:16,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:16,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901048966] [2022-01-10 08:22:16,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901048966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:16,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:16,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:16,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853203851] [2022-01-10 08:22:16,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:16,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:16,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:16,544 INFO L87 Difference]: Start difference. First operand 9328 states and 11208 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:17,456 INFO L93 Difference]: Finished difference Result 11449 states and 14063 transitions. [2022-01-10 08:22:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:17,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:17,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:17,473 INFO L225 Difference]: With dead ends: 11449 [2022-01-10 08:22:17,473 INFO L226 Difference]: Without dead ends: 9492 [2022-01-10 08:22:17,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:17,476 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 863 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:17,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 1164 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9492 states. [2022-01-10 08:22:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9492 to 9492. [2022-01-10 08:22:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9492 states, 7642 states have (on average 1.2269039518450668) internal successors, (9376), 7824 states have internal predecessors, (9376), 851 states have call successors, (851), 715 states have call predecessors, (851), 997 states have return successors, (1168), 954 states have call predecessors, (1168), 848 states have call successors, (1168) [2022-01-10 08:22:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9492 states to 9492 states and 11395 transitions. [2022-01-10 08:22:18,054 INFO L78 Accepts]: Start accepts. Automaton has 9492 states and 11395 transitions. Word has length 157 [2022-01-10 08:22:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:18,054 INFO L470 AbstractCegarLoop]: Abstraction has 9492 states and 11395 transitions. [2022-01-10 08:22:18,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 9492 states and 11395 transitions. [2022-01-10 08:22:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:18,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:18,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:18,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-01-10 08:22:18,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:18,257 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1086680199, now seen corresponding path program 1 times [2022-01-10 08:22:18,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:18,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53363421] [2022-01-10 08:22:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:18,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:18,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:18,258 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:18,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 08:22:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:18,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:18,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:18,560 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 08:22:18,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:18,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:18,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53363421] [2022-01-10 08:22:18,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53363421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:18,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:18,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:18,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87013216] [2022-01-10 08:22:18,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:18,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:18,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:18,562 INFO L87 Difference]: Start difference. First operand 9492 states and 11395 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:19,554 INFO L93 Difference]: Finished difference Result 11777 states and 14437 transitions. [2022-01-10 08:22:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:19,571 INFO L225 Difference]: With dead ends: 11777 [2022-01-10 08:22:19,571 INFO L226 Difference]: Without dead ends: 9656 [2022-01-10 08:22:19,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:19,575 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 856 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:19,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1157 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9656 states. [2022-01-10 08:22:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9656 to 9656. [2022-01-10 08:22:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9656 states, 7800 states have (on average 1.225) internal successors, (9555), 7982 states have internal predecessors, (9555), 853 states have call successors, (853), 719 states have call predecessors, (853), 1001 states have return successors, (1170), 956 states have call predecessors, (1170), 850 states have call successors, (1170) [2022-01-10 08:22:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9656 states to 9656 states and 11578 transitions. [2022-01-10 08:22:20,158 INFO L78 Accepts]: Start accepts. Automaton has 9656 states and 11578 transitions. Word has length 157 [2022-01-10 08:22:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:20,158 INFO L470 AbstractCegarLoop]: Abstraction has 9656 states and 11578 transitions. [2022-01-10 08:22:20,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9656 states and 11578 transitions. [2022-01-10 08:22:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:20,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:20,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:20,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-01-10 08:22:20,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:20,361 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -465383204, now seen corresponding path program 1 times [2022-01-10 08:22:20,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:20,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819007477] [2022-01-10 08:22:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:20,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:20,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:20,363 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:20,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 08:22:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:20,640 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 08:22:20,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:20,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:20,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819007477] [2022-01-10 08:22:20,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819007477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:20,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:20,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:20,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110836819] [2022-01-10 08:22:20,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:20,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:20,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:20,642 INFO L87 Difference]: Start difference. First operand 9656 states and 11578 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:21,313 INFO L93 Difference]: Finished difference Result 12234 states and 14968 transitions. [2022-01-10 08:22:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:21,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:21,329 INFO L225 Difference]: With dead ends: 12234 [2022-01-10 08:22:21,329 INFO L226 Difference]: Without dead ends: 9950 [2022-01-10 08:22:21,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:22:21,334 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 401 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:21,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 2522 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9950 states. [2022-01-10 08:22:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9950 to 9662. [2022-01-10 08:22:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9662 states, 7806 states have (on average 1.222264924417115) internal successors, (9541), 7988 states have internal predecessors, (9541), 853 states have call successors, (853), 719 states have call predecessors, (853), 1001 states have return successors, (1170), 956 states have call predecessors, (1170), 850 states have call successors, (1170) [2022-01-10 08:22:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9662 states to 9662 states and 11564 transitions. [2022-01-10 08:22:21,941 INFO L78 Accepts]: Start accepts. Automaton has 9662 states and 11564 transitions. Word has length 157 [2022-01-10 08:22:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:21,941 INFO L470 AbstractCegarLoop]: Abstraction has 9662 states and 11564 transitions. [2022-01-10 08:22:21,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 9662 states and 11564 transitions. [2022-01-10 08:22:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:21,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:21,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:21,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 08:22:22,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:22,144 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:22,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1088664806, now seen corresponding path program 1 times [2022-01-10 08:22:22,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:22,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093833871] [2022-01-10 08:22:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:22,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:22,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:22,146 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 08:22:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:22,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:22,438 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 08:22:22,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:22,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:22,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093833871] [2022-01-10 08:22:22,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093833871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:22,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:22,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:22,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26132863] [2022-01-10 08:22:22,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:22,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:22,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:22,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:22,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:22,441 INFO L87 Difference]: Start difference. First operand 9662 states and 11564 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:22,996 INFO L93 Difference]: Finished difference Result 12218 states and 14904 transitions. [2022-01-10 08:22:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:23,022 INFO L225 Difference]: With dead ends: 12218 [2022-01-10 08:22:23,023 INFO L226 Difference]: Without dead ends: 9928 [2022-01-10 08:22:23,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:22:23,031 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 362 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:23,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2515 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9928 states. [2022-01-10 08:22:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9928 to 9668. [2022-01-10 08:22:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9668 states, 7812 states have (on average 1.2195340501792116) internal successors, (9527), 7994 states have internal predecessors, (9527), 853 states have call successors, (853), 719 states have call predecessors, (853), 1001 states have return successors, (1170), 956 states have call predecessors, (1170), 850 states have call successors, (1170) [2022-01-10 08:22:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9668 states to 9668 states and 11550 transitions. [2022-01-10 08:22:23,650 INFO L78 Accepts]: Start accepts. Automaton has 9668 states and 11550 transitions. Word has length 157 [2022-01-10 08:22:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:23,650 INFO L470 AbstractCegarLoop]: Abstraction has 9668 states and 11550 transitions. [2022-01-10 08:22:23,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 9668 states and 11550 transitions. [2022-01-10 08:22:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:23,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:23,652 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:23,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:23,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:23,852 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash 808831960, now seen corresponding path program 1 times [2022-01-10 08:22:23,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:23,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287736429] [2022-01-10 08:22:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:23,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:23,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:23,854 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:23,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 08:22:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:24,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:24,240 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 08:22:24,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:24,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:24,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287736429] [2022-01-10 08:22:24,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287736429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:24,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:24,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:24,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047320025] [2022-01-10 08:22:24,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:24,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:24,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:24,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:24,241 INFO L87 Difference]: Start difference. First operand 9668 states and 11550 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:24,820 INFO L93 Difference]: Finished difference Result 12202 states and 14840 transitions. [2022-01-10 08:22:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:24,833 INFO L225 Difference]: With dead ends: 12202 [2022-01-10 08:22:24,834 INFO L226 Difference]: Without dead ends: 9906 [2022-01-10 08:22:24,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:22:24,837 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 323 mSDsluCounter, 1900 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:24,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 2492 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9906 states. [2022-01-10 08:22:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9906 to 9674. [2022-01-10 08:22:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9674 states, 7818 states have (on average 1.2168073676132003) internal successors, (9513), 8000 states have internal predecessors, (9513), 853 states have call successors, (853), 719 states have call predecessors, (853), 1001 states have return successors, (1170), 956 states have call predecessors, (1170), 850 states have call successors, (1170) [2022-01-10 08:22:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9674 states to 9674 states and 11536 transitions. [2022-01-10 08:22:25,403 INFO L78 Accepts]: Start accepts. Automaton has 9674 states and 11536 transitions. Word has length 157 [2022-01-10 08:22:25,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:25,403 INFO L470 AbstractCegarLoop]: Abstraction has 9674 states and 11536 transitions. [2022-01-10 08:22:25,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 9674 states and 11536 transitions. [2022-01-10 08:22:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:25,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:25,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:25,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:25,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:25,607 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash -810142954, now seen corresponding path program 1 times [2022-01-10 08:22:25,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:25,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936185413] [2022-01-10 08:22:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:25,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:25,610 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:25,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 08:22:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:25,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:25,927 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 08:22:25,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:25,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:25,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936185413] [2022-01-10 08:22:25,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936185413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:25,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:25,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:22:25,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679642784] [2022-01-10 08:22:25,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:25,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:25,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:25,928 INFO L87 Difference]: Start difference. First operand 9674 states and 11536 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:26,603 INFO L93 Difference]: Finished difference Result 14083 states and 17160 transitions. [2022-01-10 08:22:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:26,630 INFO L225 Difference]: With dead ends: 14083 [2022-01-10 08:22:26,630 INFO L226 Difference]: Without dead ends: 11781 [2022-01-10 08:22:26,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 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 08:22:26,637 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 517 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:26,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1086 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11781 states. [2022-01-10 08:22:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11781 to 11773. [2022-01-10 08:22:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11773 states, 9813 states have (on average 1.2262305105472333) internal successors, (12033), 9996 states have internal predecessors, (12033), 908 states have call successors, (908), 767 states have call predecessors, (908), 1050 states have return successors, (1226), 1011 states have call predecessors, (1226), 905 states have call successors, (1226) [2022-01-10 08:22:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11773 states to 11773 states and 14167 transitions. [2022-01-10 08:22:27,379 INFO L78 Accepts]: Start accepts. Automaton has 11773 states and 14167 transitions. Word has length 157 [2022-01-10 08:22:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:27,380 INFO L470 AbstractCegarLoop]: Abstraction has 11773 states and 14167 transitions. [2022-01-10 08:22:27,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 11773 states and 14167 transitions. [2022-01-10 08:22:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:22:27,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:27,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:27,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:27,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:22:27,583 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1858294581, now seen corresponding path program 1 times [2022-01-10 08:22:27,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811748393] [2022-01-10 08:22:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:27,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:27,585 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:22:27,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 08:22:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:27,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:27,881 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 08:22:27,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:27,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:27,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811748393] [2022-01-10 08:22:27,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811748393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:27,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:27,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:27,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701582347] [2022-01-10 08:22:27,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:27,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:27,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:27,883 INFO L87 Difference]: Start difference. First operand 11773 states and 14167 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:28,753 INFO L93 Difference]: Finished difference Result 18484 states and 22791 transitions. [2022-01-10 08:22:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:28,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:22:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:28,779 INFO L225 Difference]: With dead ends: 18484 [2022-01-10 08:22:28,779 INFO L226 Difference]: Without dead ends: 14083 [2022-01-10 08:22:28,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:22:28,790 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 289 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:28,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 2525 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14083 states.