/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/list-ext3-properties/sll_nondet_insert-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:11:13,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:11:13,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:11:13,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:11:13,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:11:13,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:11:13,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:11:13,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:11:13,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:11:13,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:11:13,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:11:13,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:11:13,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:11:13,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:11:13,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:11:13,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:11:13,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:11:13,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:11:13,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:11:13,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:11:13,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:11:13,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:11:13,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:11:13,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:11:13,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:11:13,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:11:13,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:11:13,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:11:13,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:11:13,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:11:13,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:11:13,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:11:13,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:11:13,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:11:13,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:11:13,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:11:13,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:11:13,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:11:13,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:11:13,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:11:13,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:11:13,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:11:13,715 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:11:13,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:11:13,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:11:13,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:11:13,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:11:13,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:11:13,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:11:13,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:11:13,718 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:11:13,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:11:13,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:11:13,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:11:13,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:11:13,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:11:13,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:11:13,719 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:11:13,719 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:11:13,719 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:11:13,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:11:13,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:11:13,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:11:13,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:11:13,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:11:13,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:11:13,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:11:13,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:11:13,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:11:13,721 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:11:13,721 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:11:13,721 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:11:13,721 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:11:13,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:11:13,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:11:13,722 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:11:13,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:11:13,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:11:13,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:11:13,959 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:11:13,960 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:11:13,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2022-01-10 06:11:14,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2cbb520e/757c3ab7bc69481a974f1d0b4b6c88f1/FLAGad38684f3 [2022-01-10 06:11:14,525 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:11:14,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2022-01-10 06:11:14,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2cbb520e/757c3ab7bc69481a974f1d0b4b6c88f1/FLAGad38684f3 [2022-01-10 06:11:14,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2cbb520e/757c3ab7bc69481a974f1d0b4b6c88f1 [2022-01-10 06:11:14,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:11:14,877 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:11:14,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:11:14,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:11:14,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:11:14,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:11:14" (1/1) ... [2022-01-10 06:11:14,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cfa689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:14, skipping insertion in model container [2022-01-10 06:11:14,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:11:14" (1/1) ... [2022-01-10 06:11:14,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:11:14,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:11:15,212 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2022-01-10 06:11:15,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:11:15,231 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:11:15,289 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2022-01-10 06:11:15,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:11:15,315 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:11:15,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15 WrapperNode [2022-01-10 06:11:15,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:11:15,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:11:15,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:11:15,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:11:15,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,367 INFO L137 Inliner]: procedures = 130, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 128 [2022-01-10 06:11:15,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:11:15,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:11:15,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:11:15,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:11:15,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:11:15,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:11:15,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:11:15,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:11:15,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (1/1) ... [2022-01-10 06:11:15,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:11:15,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:11:15,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:11:15,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:11:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-01-10 06:11:15,482 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2022-01-10 06:11:15,483 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-10 06:11:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:11:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:11:15,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:11:15,574 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:11:15,576 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:11:15,613 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-01-10 06:11:15,824 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:11:15,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:11:15,836 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-10 06:11:15,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:11:15 BoogieIcfgContainer [2022-01-10 06:11:15,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:11:15,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:11:15,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:11:15,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:11:15,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:11:14" (1/3) ... [2022-01-10 06:11:15,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c702025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:11:15, skipping insertion in model container [2022-01-10 06:11:15,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:11:15" (2/3) ... [2022-01-10 06:11:15,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c702025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:11:15, skipping insertion in model container [2022-01-10 06:11:15,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:11:15" (3/3) ... [2022-01-10 06:11:15,854 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2022-01-10 06:11:15,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:11:15,867 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:11:15,911 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:11:15,917 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:11:15,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:11:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 37 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:11:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 06:11:15,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:15,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:15,939 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1790766916, now seen corresponding path program 1 times [2022-01-10 06:11:15,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:15,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478313009] [2022-01-10 06:11:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:15,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:15,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:15,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:15,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:11:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:16,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:11:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:11:16,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:16,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478313009] [2022-01-10 06:11:16,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478313009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:16,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:16,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:11:16,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907981671] [2022-01-10 06:11:16,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:16,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:11:16,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:16,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:11:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:11:16,174 INFO L87 Difference]: Start difference. First operand has 43 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 37 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:11:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:16,204 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2022-01-10 06:11:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:11:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-01-10 06:11:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:16,211 INFO L225 Difference]: With dead ends: 83 [2022-01-10 06:11:16,212 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 06:11:16,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:11:16,217 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:16,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:11:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 06:11:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-10 06:11:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:11:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-10 06:11:16,252 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2022-01-10 06:11:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:16,253 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-10 06:11:16,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:11:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-10 06:11:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 06:11:16,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:16,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:16,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:16,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:11:16,470 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1378768443, now seen corresponding path program 1 times [2022-01-10 06:11:16,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:16,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522686785] [2022-01-10 06:11:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:16,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:16,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:16,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:16,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:11:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:11:16,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:11:16,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:16,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:16,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522686785] [2022-01-10 06:11:16,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522686785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:16,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:11:16,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402380328] [2022-01-10 06:11:16,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:11:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:16,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:11:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:11:16,664 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:11:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:16,759 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2022-01-10 06:11:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:11:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-01-10 06:11:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:16,762 INFO L225 Difference]: With dead ends: 67 [2022-01-10 06:11:16,762 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 06:11:16,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:11:16,764 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:16,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 183 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:11:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 06:11:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-10 06:11:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:11:16,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-01-10 06:11:16,777 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2022-01-10 06:11:16,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:16,777 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-01-10 06:11:16,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:11:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-01-10 06:11:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 06:11:16,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:16,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:11:16,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:16,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:11:16,985 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:16,985 INFO L85 PathProgramCache]: Analyzing trace with hash -596672975, now seen corresponding path program 1 times [2022-01-10 06:11:16,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:16,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196521147] [2022-01-10 06:11:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:16,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:16,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:16,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:16,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:11:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:17,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:11:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:11:17,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:11:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:11:17,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196521147] [2022-01-10 06:11:17,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196521147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:11:17,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:11:17,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 06:11:17,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054610565] [2022-01-10 06:11:17,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:11:17,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:11:17,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:11:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:11:17,470 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:11:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:18,048 INFO L93 Difference]: Finished difference Result 95 states and 124 transitions. [2022-01-10 06:11:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:11:18,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-01-10 06:11:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:18,051 INFO L225 Difference]: With dead ends: 95 [2022-01-10 06:11:18,051 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 06:11:18,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:11:18,053 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:18,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 388 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:11:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 06:11:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2022-01-10 06:11:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:11:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-01-10 06:11:18,061 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 28 [2022-01-10 06:11:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:18,061 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-01-10 06:11:18,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:11:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-01-10 06:11:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 06:11:18,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:18,063 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:11:18,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:18,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:11:18,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash 865714146, now seen corresponding path program 1 times [2022-01-10 06:11:18,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:18,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635756117] [2022-01-10 06:11:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:18,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:18,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:18,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:18,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:11:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:11:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:11:18,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:11:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:11:18,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635756117] [2022-01-10 06:11:18,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635756117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:11:18,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:11:18,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 06:11:18,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292731089] [2022-01-10 06:11:18,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:11:18,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:11:18,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:11:18,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:11:18,765 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:11:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:19,079 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-01-10 06:11:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:11:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-01-10 06:11:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:19,083 INFO L225 Difference]: With dead ends: 96 [2022-01-10 06:11:19,083 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 06:11:19,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:11:19,085 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:19,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 336 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:11:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 06:11:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2022-01-10 06:11:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:11:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-01-10 06:11:19,094 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 31 [2022-01-10 06:11:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:19,094 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-01-10 06:11:19,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:11:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-01-10 06:11:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 06:11:19,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:19,096 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:11:19,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:19,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:11:19,307 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash -811508062, now seen corresponding path program 1 times [2022-01-10 06:11:19,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:19,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316805239] [2022-01-10 06:11:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:19,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:19,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:19,310 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:19,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:11:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:11:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:11:19,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:11:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:11:19,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:19,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316805239] [2022-01-10 06:11:19,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316805239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:11:19,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:11:19,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 06:11:19,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802686144] [2022-01-10 06:11:19,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:11:19,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:11:19,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:11:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:11:19,882 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:11:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:20,898 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-01-10 06:11:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:11:20,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-01-10 06:11:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:20,901 INFO L225 Difference]: With dead ends: 116 [2022-01-10 06:11:20,901 INFO L226 Difference]: Without dead ends: 85 [2022-01-10 06:11:20,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:11:20,902 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:20,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 476 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:11:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-10 06:11:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2022-01-10 06:11:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:11:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-01-10 06:11:20,911 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 33 [2022-01-10 06:11:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:20,911 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-01-10 06:11:20,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:11:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-01-10 06:11:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 06:11:20,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:20,912 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 06:11:20,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:21,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:11:21,123 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 945421833, now seen corresponding path program 2 times [2022-01-10 06:11:21,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:21,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34375889] [2022-01-10 06:11:21,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:11:21,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:21,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:21,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:21,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:11:21,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:11:21,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:11:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:11:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:21,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-10 06:11:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:11:21,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:11:21,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34375889] [2022-01-10 06:11:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34375889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:11:21,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:11:21,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:11:21,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62237861] [2022-01-10 06:11:21,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:11:21,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:11:21,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:21,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:11:21,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:11:21,412 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:11:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:21,529 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-01-10 06:11:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:11:21,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-01-10 06:11:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:21,533 INFO L225 Difference]: With dead ends: 79 [2022-01-10 06:11:21,533 INFO L226 Difference]: Without dead ends: 74 [2022-01-10 06:11:21,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:11:21,534 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:21,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 233 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-01-10 06:11:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-10 06:11:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2022-01-10 06:11:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:11:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-01-10 06:11:21,543 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 35 [2022-01-10 06:11:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:21,544 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-01-10 06:11:21,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:11:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-01-10 06:11:21,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:11:21,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:21,553 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 06:11:21,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:11:21,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:11:21,763 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash -705039936, now seen corresponding path program 1 times [2022-01-10 06:11:21,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:21,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390531732] [2022-01-10 06:11:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:11:21,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:21,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:21,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:21,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:11:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:11:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 06:11:21,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:21,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:11:22,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-10 06:11:22,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:11:22,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-10 06:11:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:11:22,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:11:22,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-10 06:11:22,723 INFO L353 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2022-01-10 06:11:22,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 132 [2022-01-10 06:11:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:11:22,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:22,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390531732] [2022-01-10 06:11:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390531732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:11:22,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:11:22,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2022-01-10 06:11:22,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750878462] [2022-01-10 06:11:22,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:11:22,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:11:22,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:11:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:11:22,810 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:11:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:23,303 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2022-01-10 06:11:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:11:23,304 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-01-10 06:11:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:23,305 INFO L225 Difference]: With dead ends: 84 [2022-01-10 06:11:23,305 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 06:11:23,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:11:23,306 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 28 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:23,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 375 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-01-10 06:11:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 06:11:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2022-01-10 06:11:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:11:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-01-10 06:11:23,315 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 36 [2022-01-10 06:11:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:23,315 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-01-10 06:11:23,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:11:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-01-10 06:11:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:11:23,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:23,316 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 06:11:23,327 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 06:11:23,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:11:23,526 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash -329747223, now seen corresponding path program 2 times [2022-01-10 06:11:23,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:23,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893853528] [2022-01-10 06:11:23,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:11:23,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:23,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:23,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:23,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:11:23,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:11:23,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:11:23,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:11:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:11:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:11:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:11:24,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:11:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893853528] [2022-01-10 06:11:24,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893853528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:11:24,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:11:24,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2022-01-10 06:11:24,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224939120] [2022-01-10 06:11:24,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:11:24,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:11:24,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:11:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:11:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:11:24,309 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:11:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:11:25,037 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2022-01-10 06:11:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:11:25,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-01-10 06:11:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:11:25,040 INFO L225 Difference]: With dead ends: 155 [2022-01-10 06:11:25,040 INFO L226 Difference]: Without dead ends: 150 [2022-01-10 06:11:25,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:11:25,041 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 98 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:11:25,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 543 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:11:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-10 06:11:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 102. [2022-01-10 06:11:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 92 states have internal predecessors, (110), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-10 06:11:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 128 transitions. [2022-01-10 06:11:25,069 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 128 transitions. Word has length 37 [2022-01-10 06:11:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:11:25,071 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 128 transitions. [2022-01-10 06:11:25,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:11:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 128 transitions. [2022-01-10 06:11:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 06:11:25,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:11:25,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-10 06:11:25,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:11:25,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:11:25,289 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:11:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:11:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1580575008, now seen corresponding path program 3 times [2022-01-10 06:11:25,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:11:25,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395313092] [2022-01-10 06:11:25,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:11:25,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:11:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:11:25,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:11:25,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:11:25,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:11:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:11:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 06:11:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:11:25,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:11:25,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:11:25,642 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-01-10 06:11:25,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-01-10 06:11:25,672 INFO L353 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-01-10 06:11:25,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-10 06:11:27,035 INFO L353 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2022-01-10 06:11:27,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 79 [2022-01-10 06:11:27,173 INFO L353 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2022-01-10 06:11:27,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 30 [2022-01-10 06:11:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:11:27,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:12:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver