/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:04:36,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:04:36,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:04:36,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:04:36,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:04:36,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:04:36,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:04:36,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:04:36,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:04:36,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:04:36,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:04:36,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:04:36,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:04:36,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:04:36,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:04:36,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:04:36,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:04:36,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:04:36,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:04:36,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:04:36,487 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:04:36,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:04:36,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:04:36,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:04:36,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:04:36,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 08:04:36,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 08:04:36,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 08:04:36,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 08:04:36,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 08:04:36,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 08:04:36,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 08:04:36,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 08:04:36,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 08:04:36,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 08:04:36,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 08:04:36,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 08:04:36,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 08:04:36,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 08:04:36,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:04:36,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:04:36,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:04:36,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:04:36,535 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:04:36,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:04:36,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:04:36,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:04:36,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:04:36,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:04:36,537 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:04:36,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:04:36,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:04:36,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:04:36,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:04:36,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:04:36,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:04:36,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:04:36,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:04:36,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:04:36,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:04:36,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:04:36,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:04:36,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:04:36,539 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:04:36,539 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:04:36,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:04:36,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:04:36,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:04:36,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:04:36,752 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:04:36,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-03-20 08:04:36,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce01c4644/59e70377e6f543b392896874ebd6d93a/FLAGbbbe5afef [2022-03-20 08:04:37,152 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:04:37,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-03-20 08:04:37,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce01c4644/59e70377e6f543b392896874ebd6d93a/FLAGbbbe5afef [2022-03-20 08:04:37,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce01c4644/59e70377e6f543b392896874ebd6d93a [2022-03-20 08:04:37,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:04:37,169 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:04:37,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:04:37,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:04:37,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:04:37,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ae240a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37, skipping insertion in model container [2022-03-20 08:04:37,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:04:37,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:04:37,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-03-20 08:04:37,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:04:37,388 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:04:37,397 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-03-20 08:04:37,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:04:37,430 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:04:37,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37 WrapperNode [2022-03-20 08:04:37,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:04:37,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:04:37,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:04:37,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:04:37,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:04:37,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:04:37,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:04:37,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:04:37,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:04:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:37,499 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) [2022-03-20 08:04:37,517 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 [2022-03-20 08:04:37,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:04:37,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:04:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:04:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:04:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:04:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:04:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:04:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:04:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:04:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:04:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:04:37,603 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:04:37,605 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:04:37,720 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:04:37,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:04:37,726 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-20 08:04:37,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:37 BoogieIcfgContainer [2022-03-20 08:04:37,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:04:37,728 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:04:37,728 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:04:37,729 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:04:37,731 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,732 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:04:37,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:04:37 BasicIcfg [2022-03-20 08:04:37,753 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:04:37,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:04:37,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:04:37,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:04:37,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:04:37" (1/4) ... [2022-03-20 08:04:37,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf7f244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:04:37, skipping insertion in model container [2022-03-20 08:04:37,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (2/4) ... [2022-03-20 08:04:37,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf7f244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:04:37, skipping insertion in model container [2022-03-20 08:04:37,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:37" (3/4) ... [2022-03-20 08:04:37,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf7f244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:04:37, skipping insertion in model container [2022-03-20 08:04:37,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:04:37" (4/4) ... [2022-03-20 08:04:37,758 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.iqvasr [2022-03-20 08:04:37,761 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:04:37,762 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:04:37,803 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:04:37,807 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-20 08:04:37,810 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:04:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:04:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:04:37,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:37,828 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:37,828 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1974064059, now seen corresponding path program 1 times [2022-03-20 08:04:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:37,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288673271] [2022-03-20 08:04:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:37,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:38,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:38,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288673271] [2022-03-20 08:04:38,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288673271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:38,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:04:38,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:04:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285577472] [2022-03-20 08:04:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:38,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:04:38,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:04:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:04:38,030 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:38,059 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-03-20 08:04:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:04:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 08:04:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:38,064 INFO L225 Difference]: With dead ends: 64 [2022-03-20 08:04:38,064 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 08:04:38,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:04:38,068 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:38,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 08:04:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 08:04:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-20 08:04:38,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-03-20 08:04:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:38,090 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-20 08:04:38,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-20 08:04:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:04:38,091 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:38,092 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:38,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:04:38,092 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:38,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1576298534, now seen corresponding path program 1 times [2022-03-20 08:04:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:38,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824159929] [2022-03-20 08:04:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:38,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:38,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824159929] [2022-03-20 08:04:38,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824159929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:38,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:04:38,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:04:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187321638] [2022-03-20 08:04:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:38,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:04:38,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:04:38,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:04:38,157 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:38,231 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-03-20 08:04:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:04:38,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 08:04:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:38,233 INFO L225 Difference]: With dead ends: 65 [2022-03-20 08:04:38,233 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 08:04:38,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:04:38,235 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:38,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:04:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 08:04:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-03-20 08:04:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-20 08:04:38,245 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-03-20 08:04:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:38,245 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-20 08:04:38,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-20 08:04:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 08:04:38,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:38,246 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:38,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:04:38,246 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:38,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:38,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1150961380, now seen corresponding path program 1 times [2022-03-20 08:04:38,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:38,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235605986] [2022-03-20 08:04:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:38,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:38,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235605986] [2022-03-20 08:04:38,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235605986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:38,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247277894] [2022-03-20 08:04:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:38,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:38,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:38,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:04:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:04:38,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:04:38,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:04:38,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247277894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:38,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:04:38,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-20 08:04:38,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454396882] [2022-03-20 08:04:38,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:38,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:04:38,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:04:38,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:04:38,498 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:38,531 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 08:04:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:04:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 08:04:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:38,532 INFO L225 Difference]: With dead ends: 54 [2022-03-20 08:04:38,532 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 08:04:38,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:04:38,534 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:38,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 169 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 08:04:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-03-20 08:04:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-03-20 08:04:38,539 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-03-20 08:04:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:38,539 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-03-20 08:04:38,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-03-20 08:04:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 08:04:38,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:38,540 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:38,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:38,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:38,757 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash 452661009, now seen corresponding path program 1 times [2022-03-20 08:04:38,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:38,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008031197] [2022-03-20 08:04:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:04:38,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:38,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008031197] [2022-03-20 08:04:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008031197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817545052] [2022-03-20 08:04:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:38,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:38,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:04:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 08:04:38,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:04:38,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:04:38,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817545052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:38,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:04:38,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-20 08:04:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649303691] [2022-03-20 08:04:38,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:38,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:04:38,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:38,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:04:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:04:38,998 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:39,035 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2022-03-20 08:04:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:04:39,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 08:04:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:39,039 INFO L225 Difference]: With dead ends: 99 [2022-03-20 08:04:39,039 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 08:04:39,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:04:39,048 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:39,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 08:04:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-03-20 08:04:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-03-20 08:04:39,057 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-03-20 08:04:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:39,058 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-03-20 08:04:39,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,058 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-03-20 08:04:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 08:04:39,059 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:39,059 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:39,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:39,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:04:39,275 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:39,276 INFO L85 PathProgramCache]: Analyzing trace with hash -302875202, now seen corresponding path program 1 times [2022-03-20 08:04:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:39,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769924945] [2022-03-20 08:04:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:04:39,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769924945] [2022-03-20 08:04:39,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769924945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743489660] [2022-03-20 08:04:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:39,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:39,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:39,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:39,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:04:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 08:04:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:39,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-20 08:04:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:04:39,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:04:39,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743489660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:39,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:04:39,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-03-20 08:04:39,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630852482] [2022-03-20 08:04:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:39,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:04:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:04:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 08:04:39,527 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:39,584 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-03-20 08:04:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:04:39,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 08:04:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:39,585 INFO L225 Difference]: With dead ends: 66 [2022-03-20 08:04:39,585 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 08:04:39,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-20 08:04:39,586 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:39,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 123 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 08:04:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 08:04:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-03-20 08:04:39,591 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-03-20 08:04:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:39,591 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-03-20 08:04:39,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-03-20 08:04:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 08:04:39,591 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:39,592 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:39,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:39,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:39,809 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1691240082, now seen corresponding path program 1 times [2022-03-20 08:04:39,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:39,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437390830] [2022-03-20 08:04:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:39,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:04:39,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:39,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437390830] [2022-03-20 08:04:39,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437390830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:39,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146452891] [2022-03-20 08:04:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:39,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:39,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:39,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:39,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:04:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 08:04:39,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:40,070 INFO L390 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 [2022-03-20 08:04:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:04:40,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:40,140 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 08:04:40,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 08:04:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:04:40,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146452891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:40,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:40,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2022-03-20 08:04:40,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481591349] [2022-03-20 08:04:40,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:40,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 08:04:40,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 08:04:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 08:04:40,169 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:40,462 INFO L93 Difference]: Finished difference Result 165 states and 224 transitions. [2022-03-20 08:04:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 08:04:40,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 08:04:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:40,463 INFO L225 Difference]: With dead ends: 165 [2022-03-20 08:04:40,464 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 08:04:40,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-03-20 08:04:40,465 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 285 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:40,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 62 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:04:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 08:04:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-03-20 08:04:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-03-20 08:04:40,471 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 29 [2022-03-20 08:04:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:40,472 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-03-20 08:04:40,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-03-20 08:04:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 08:04:40,472 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:40,472 INFO L499 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, 1, 1, 1, 1] [2022-03-20 08:04:40,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:40,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:40,689 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash 671956355, now seen corresponding path program 1 times [2022-03-20 08:04:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983979174] [2022-03-20 08:04:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:40,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:40,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 08:04:40,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:40,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983979174] [2022-03-20 08:04:40,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983979174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:40,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575299789] [2022-03-20 08:04:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:40,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:40,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:40,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:40,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:04:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 08:04:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:04:40,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 08:04:40,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575299789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:40,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:40,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2022-03-20 08:04:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141965596] [2022-03-20 08:04:40,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:40,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 08:04:40,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 08:04:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 08:04:40,904 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:41,486 INFO L93 Difference]: Finished difference Result 325 states and 469 transitions. [2022-03-20 08:04:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 08:04:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 08:04:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:41,488 INFO L225 Difference]: With dead ends: 325 [2022-03-20 08:04:41,488 INFO L226 Difference]: Without dead ends: 288 [2022-03-20 08:04:41,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 08:04:41,489 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 384 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:41,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 71 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:04:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-20 08:04:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 72. [2022-03-20 08:04:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-03-20 08:04:41,500 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 32 [2022-03-20 08:04:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:41,500 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-03-20 08:04:41,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-03-20 08:04:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 08:04:41,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:41,501 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-03-20 08:04:41,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:41,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:41,718 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash 901240101, now seen corresponding path program 2 times [2022-03-20 08:04:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:41,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519851119] [2022-03-20 08:04:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:41,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:41,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 08:04:41,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:41,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519851119] [2022-03-20 08:04:41,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519851119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:41,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514491463] [2022-03-20 08:04:41,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:04:41,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:41,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:41,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:41,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:04:41,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:04:41,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:04:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 08:04:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:42,019 INFO L390 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 [2022-03-20 08:04:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:04:42,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:42,125 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 08:04:42,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-03-20 08:04:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 08:04:42,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514491463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:42,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:42,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 9] total 22 [2022-03-20 08:04:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27182314] [2022-03-20 08:04:42,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:42,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 08:04:42,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 08:04:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:04:42,175 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:43,008 INFO L93 Difference]: Finished difference Result 465 states and 620 transitions. [2022-03-20 08:04:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 08:04:43,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-20 08:04:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:43,010 INFO L225 Difference]: With dead ends: 465 [2022-03-20 08:04:43,010 INFO L226 Difference]: Without dead ends: 406 [2022-03-20 08:04:43,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 08:04:43,012 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 969 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:43,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 108 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 08:04:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-03-20 08:04:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 95. [2022-03-20 08:04:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.288888888888889) internal successors, (116), 90 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2022-03-20 08:04:43,026 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 39 [2022-03-20 08:04:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:43,026 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2022-03-20 08:04:43,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2022-03-20 08:04:43,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 08:04:43,027 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:43,027 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:43,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:43,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:43,240 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash 897642276, now seen corresponding path program 1 times [2022-03-20 08:04:43,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677369039] [2022-03-20 08:04:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:43,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:43,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 08:04:43,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:43,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677369039] [2022-03-20 08:04:43,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677369039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:43,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903113315] [2022-03-20 08:04:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:43,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:43,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:43,302 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:43,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:04:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:43,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 08:04:43,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 08:04:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 08:04:43,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903113315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:43,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:43,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 14 [2022-03-20 08:04:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302344082] [2022-03-20 08:04:43,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:43,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 08:04:43,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 08:04:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:04:43,512 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:44,717 INFO L93 Difference]: Finished difference Result 646 states and 965 transitions. [2022-03-20 08:04:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 08:04:44,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-20 08:04:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:44,719 INFO L225 Difference]: With dead ends: 646 [2022-03-20 08:04:44,719 INFO L226 Difference]: Without dead ends: 566 [2022-03-20 08:04:44,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=624, Invalid=2346, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 08:04:44,722 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 939 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:44,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 119 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 08:04:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-03-20 08:04:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 183. [2022-03-20 08:04:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.297752808988764) internal successors, (231), 178 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 235 transitions. [2022-03-20 08:04:44,752 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 235 transitions. Word has length 42 [2022-03-20 08:04:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:44,752 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 235 transitions. [2022-03-20 08:04:44,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 235 transitions. [2022-03-20 08:04:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 08:04:44,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:44,759 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:44,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:44,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:44,967 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1148183642, now seen corresponding path program 1 times [2022-03-20 08:04:44,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:44,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040907375] [2022-03-20 08:04:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:44,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-20 08:04:45,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:45,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040907375] [2022-03-20 08:04:45,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040907375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:45,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288972479] [2022-03-20 08:04:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:45,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:45,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:45,057 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:45,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:04:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 08:04:45,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-20 08:04:45,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-20 08:04:45,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288972479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:45,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:45,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-03-20 08:04:45,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023985871] [2022-03-20 08:04:45,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:45,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 08:04:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 08:04:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-20 08:04:45,381 INFO L87 Difference]: Start difference. First operand 183 states and 235 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:47,813 INFO L93 Difference]: Finished difference Result 1129 states and 1600 transitions. [2022-03-20 08:04:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 08:04:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 08:04:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:47,817 INFO L225 Difference]: With dead ends: 1129 [2022-03-20 08:04:47,817 INFO L226 Difference]: Without dead ends: 963 [2022-03-20 08:04:47,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1099, Invalid=5381, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 08:04:47,820 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 1743 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:47,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 190 Invalid, 3019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 08:04:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-20 08:04:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 257. [2022-03-20 08:04:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.3055555555555556) internal successors, (329), 252 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 333 transitions. [2022-03-20 08:04:47,859 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 333 transitions. Word has length 68 [2022-03-20 08:04:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:47,859 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 333 transitions. [2022-03-20 08:04:47,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 333 transitions. [2022-03-20 08:04:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 08:04:47,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:47,861 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:47,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:48,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 08:04:48,068 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:48,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash 171263176, now seen corresponding path program 2 times [2022-03-20 08:04:48,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:48,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193828155] [2022-03-20 08:04:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:48,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:48,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-03-20 08:04:48,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193828155] [2022-03-20 08:04:48,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193828155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397686752] [2022-03-20 08:04:48,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:04:48,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:48,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:48,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:48,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:04:48,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:04:48,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:04:48,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 08:04:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-20 08:04:48,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-20 08:04:48,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397686752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:48,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:48,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-03-20 08:04:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898285994] [2022-03-20 08:04:48,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:48,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 08:04:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 08:04:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-20 08:04:48,802 INFO L87 Difference]: Start difference. First operand 257 states and 333 transitions. Second operand has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:52,811 INFO L93 Difference]: Finished difference Result 1394 states and 1888 transitions. [2022-03-20 08:04:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 08:04:52,812 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-20 08:04:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:52,815 INFO L225 Difference]: With dead ends: 1394 [2022-03-20 08:04:52,815 INFO L226 Difference]: Without dead ends: 1156 [2022-03-20 08:04:52,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3725 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1475, Invalid=11635, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 08:04:52,818 INFO L913 BasicCegarLoop]: 248 mSDtfsCounter, 2231 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 7054 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2231 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 7789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 7054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:52,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2231 Valid, 320 Invalid, 7789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 7054 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 08:04:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-03-20 08:04:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 283. [2022-03-20 08:04:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.29136690647482) internal successors, (359), 278 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 363 transitions. [2022-03-20 08:04:52,853 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 363 transitions. Word has length 88 [2022-03-20 08:04:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:52,853 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 363 transitions. [2022-03-20 08:04:52,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 363 transitions. [2022-03-20 08:04:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 08:04:52,854 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:52,854 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:52,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:53,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:53,066 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1294175702, now seen corresponding path program 3 times [2022-03-20 08:04:53,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962460506] [2022-03-20 08:04:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:53,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:53,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-03-20 08:04:53,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962460506] [2022-03-20 08:04:53,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962460506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102500407] [2022-03-20 08:04:53,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:04:53,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:53,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:53,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:53,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 08:04:53,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-20 08:04:53,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:04:53,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 08:04:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-03-20 08:04:53,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-03-20 08:04:54,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102500407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:54,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:54,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 16] total 26 [2022-03-20 08:04:54,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923974871] [2022-03-20 08:04:54,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:54,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:04:54,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:04:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-03-20 08:04:54,192 INFO L87 Difference]: Start difference. First operand 283 states and 363 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:16,717 INFO L93 Difference]: Finished difference Result 4633 states and 6144 transitions. [2022-03-20 08:05:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 08:05:16,717 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-20 08:05:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:16,729 INFO L225 Difference]: With dead ends: 4633 [2022-03-20 08:05:16,729 INFO L226 Difference]: Without dead ends: 4371 [2022-03-20 08:05:16,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5004 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=2549, Invalid=12213, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 08:05:16,732 INFO L913 BasicCegarLoop]: 210 mSDtfsCounter, 2769 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2769 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:16,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2769 Valid, 272 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-20 08:05:16,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-03-20 08:05:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 301. [2022-03-20 08:05:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.277027027027027) internal successors, (378), 296 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 382 transitions. [2022-03-20 08:05:16,810 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 382 transitions. Word has length 96 [2022-03-20 08:05:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:16,810 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 382 transitions. [2022-03-20 08:05:16,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 382 transitions. [2022-03-20 08:05:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 08:05:16,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:16,811 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:16,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 08:05:17,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 08:05:17,015 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1837140656, now seen corresponding path program 4 times [2022-03-20 08:05:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827532793] [2022-03-20 08:05:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:17,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-20 08:05:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827532793] [2022-03-20 08:05:17,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827532793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882446480] [2022-03-20 08:05:17,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:05:17,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:17,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:17,472 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:17,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 08:05:17,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:05:17,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:17,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 08:05:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:17,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 08:05:17,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:17,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:17,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:17,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:17,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:17,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:17,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:17,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:17,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:18,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:18,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 08:05:18,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 08:05:18,716 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-20 08:05:18,717 INFO L390 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 23 [2022-03-20 08:05:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 08:05:18,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:19,417 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_345) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_345 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-03-20 08:05:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 08:05:19,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882446480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:19,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:19,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 46 [2022-03-20 08:05:19,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514024423] [2022-03-20 08:05:19,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:19,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 08:05:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:19,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 08:05:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1793, Unknown=1, NotChecked=86, Total=2070 [2022-03-20 08:05:19,593 INFO L87 Difference]: Start difference. First operand 301 states and 382 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:28,520 INFO L93 Difference]: Finished difference Result 1195 states and 1560 transitions. [2022-03-20 08:05:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-20 08:05:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 08:05:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:28,523 INFO L225 Difference]: With dead ends: 1195 [2022-03-20 08:05:28,523 INFO L226 Difference]: Without dead ends: 1087 [2022-03-20 08:05:28,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3180, Invalid=29043, Unknown=1, NotChecked=356, Total=32580 [2022-03-20 08:05:28,529 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 1788 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 4440 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 5485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 4440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:28,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1788 Valid, 194 Invalid, 5485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 4440 Invalid, 0 Unknown, 303 Unchecked, 2.3s Time] [2022-03-20 08:05:28,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-03-20 08:05:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 420. [2022-03-20 08:05:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.274698795180723) internal successors, (529), 415 states have internal predecessors, (529), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 533 transitions. [2022-03-20 08:05:28,622 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 533 transitions. Word has length 102 [2022-03-20 08:05:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:28,622 INFO L478 AbstractCegarLoop]: Abstraction has 420 states and 533 transitions. [2022-03-20 08:05:28,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 533 transitions. [2022-03-20 08:05:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 08:05:28,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:28,623 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:28,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:28,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 08:05:28,824 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash 983559120, now seen corresponding path program 1 times [2022-03-20 08:05:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476963398] [2022-03-20 08:05:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:28,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:29,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 08:05:29,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476963398] [2022-03-20 08:05:29,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476963398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558744653] [2022-03-20 08:05:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:29,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:29,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:29,291 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:29,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 08:05:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:29,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 08:05:29,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:29,757 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 08:05:29,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:05:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 08:05:29,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:30,027 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-03-20 08:05:30,027 INFO L390 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 65 [2022-03-20 08:05:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 08:05:30,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558744653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:30,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:30,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 31 [2022-03-20 08:05:30,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146951210] [2022-03-20 08:05:30,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:30,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 08:05:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 08:05:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-03-20 08:05:30,145 INFO L87 Difference]: Start difference. First operand 420 states and 533 transitions. Second operand has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:32,996 INFO L93 Difference]: Finished difference Result 1075 states and 1380 transitions. [2022-03-20 08:05:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 08:05:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 08:05:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:32,999 INFO L225 Difference]: With dead ends: 1075 [2022-03-20 08:05:32,999 INFO L226 Difference]: Without dead ends: 894 [2022-03-20 08:05:33,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=868, Invalid=6964, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 08:05:33,001 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 539 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:33,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 146 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 08:05:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-03-20 08:05:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 542. [2022-03-20 08:05:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 1.2681564245810055) internal successors, (681), 537 states have internal predecessors, (681), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 685 transitions. [2022-03-20 08:05:33,126 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 685 transitions. Word has length 102 [2022-03-20 08:05:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:33,127 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 685 transitions. [2022-03-20 08:05:33,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 685 transitions. [2022-03-20 08:05:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 08:05:33,132 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:33,132 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:33,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:33,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 08:05:33,333 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:33,334 INFO L85 PathProgramCache]: Analyzing trace with hash -709416465, now seen corresponding path program 2 times [2022-03-20 08:05:33,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:33,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412203952] [2022-03-20 08:05:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:33,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 08:05:33,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412203952] [2022-03-20 08:05:33,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412203952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788868998] [2022-03-20 08:05:33,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:05:33,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:33,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:33,677 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:33,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 08:05:33,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:05:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 08:05:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:34,476 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 08:05:34,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 08:05:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 08:05:34,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:34,959 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 08:05:34,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 08:05:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 08:05:35,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788868998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:35,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:35,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 41 [2022-03-20 08:05:35,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412587718] [2022-03-20 08:05:35,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:35,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 08:05:35,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 08:05:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 08:05:35,154 INFO L87 Difference]: Start difference. First operand 542 states and 685 transitions. Second operand has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:40,646 INFO L93 Difference]: Finished difference Result 1753 states and 2254 transitions. [2022-03-20 08:05:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-20 08:05:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 08:05:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:40,650 INFO L225 Difference]: With dead ends: 1753 [2022-03-20 08:05:40,650 INFO L226 Difference]: Without dead ends: 1482 [2022-03-20 08:05:40,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6955 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2226, Invalid=19826, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 08:05:40,651 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 1473 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 3582 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 4153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 3582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:40,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1473 Valid, 168 Invalid, 4153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 3582 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 08:05:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-03-20 08:05:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 579. [2022-03-20 08:05:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 574 states have (on average 1.2526132404181185) internal successors, (719), 574 states have internal predecessors, (719), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 723 transitions. [2022-03-20 08:05:40,791 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 723 transitions. Word has length 102 [2022-03-20 08:05:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:40,792 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 723 transitions. [2022-03-20 08:05:40,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 723 transitions. [2022-03-20 08:05:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 08:05:40,793 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:40,793 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:40,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:41,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 08:05:41,011 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:41,011 INFO L85 PathProgramCache]: Analyzing trace with hash -366375887, now seen corresponding path program 3 times [2022-03-20 08:05:41,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:41,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882454651] [2022-03-20 08:05:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:41,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:41,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 08:05:41,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:41,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882454651] [2022-03-20 08:05:41,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882454651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:41,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496955148] [2022-03-20 08:05:41,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:05:41,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:41,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:41,384 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:41,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 08:05:41,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-20 08:05:41,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:41,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 08:05:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:43,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:05:43,084 INFO L356 Elim1Store]: treesize reduction 46, result has 63.8 percent of original size [2022-03-20 08:05:43,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 97 [2022-03-20 08:05:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 19 proven. 141 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-20 08:05:43,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:49,767 INFO L356 Elim1Store]: treesize reduction 204, result has 25.8 percent of original size [2022-03-20 08:05:49,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 86 [2022-03-20 08:05:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 13 proven. 147 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-20 08:05:50,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496955148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:50,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:50,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 24, 20] total 52 [2022-03-20 08:05:50,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674792041] [2022-03-20 08:05:50,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:50,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 08:05:50,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 08:05:50,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2238, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 08:05:50,016 INFO L87 Difference]: Start difference. First operand 579 states and 723 transitions. Second operand has 52 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 51 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:28,703 WARN L232 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 100 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:06:52,526 WARN L232 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 76 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:07:01,985 WARN L232 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 89 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:07:12,475 WARN L232 SmtUtils]: Spent 10.23s on a formula simplification. DAG size of input: 85 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:07:37,301 WARN L232 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:07:56,043 WARN L232 SmtUtils]: Spent 10.80s on a formula simplification. DAG size of input: 88 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:08:20,444 WARN L232 SmtUtils]: Spent 12.97s on a formula simplification. DAG size of input: 105 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:08:45,932 WARN L232 SmtUtils]: Spent 9.20s on a formula simplification. DAG size of input: 92 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:09:06,449 WARN L232 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:09:43,293 WARN L232 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:09:44,755 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (< (mod c_main_~j~0 4294967296) 10) (forall ((aux_mod_aux_mod_aux_mod_main_~j~0_32_52_54 Int) (aux_div_aux_mod_aux_mod_main_~j~0_32_52_54 Int) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse2 (* aux_div_aux_mod_aux_mod_main_~j~0_32_52_54 4294967296))) (let ((.cse0 (+ aux_mod_aux_mod_aux_mod_main_~j~0_32_52_54 .cse2)) (.cse1 (+ aux_mod_aux_mod_aux_mod_main_~j~0_32_52_54 (* aux_div_aux_mod_main_~j~0_32_52 4294967296) .cse2))) (or (< aux_mod_aux_mod_aux_mod_main_~j~0_32_52_54 0) (< .cse0 2) (<= 12 .cse0) (<= 8589934591 .cse1) (< .cse1 4294967305) (not (= (select (select |c_#memory_int| |c_main_~#vetor_vogais~0.base|) (+ |c_main_~#vetor_vogais~0.offset| (mod (+ aux_mod_aux_mod_aux_mod_main_~j~0_32_52_54 4294967294) 4294967296))) (select (select |c_#memory_int| |c_main_~#string_entrada~0.base|) (+ (mod c_main_~i~0 4294967296) |c_main_~#string_entrada~0.offset|)))) (<= 10 aux_mod_aux_mod_aux_mod_main_~j~0_32_52_54))))) (or (< (mod (+ 3 c_main_~j~0) 4294967296) 10) (not (< (mod (+ 2 c_main_~j~0) 4294967296) 10))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-20 08:09:57,967 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-03-20 08:09:57,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-03-20 08:09:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-20 08:09:57,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 204 SyntacticMatches, 14 SemanticMatches, 190 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13944 ImplicationChecksByTransitivity, 242.6s TimeCoverageRelationStatistics Valid=4800, Invalid=31463, Unknown=31, NotChecked=378, Total=36672 [2022-03-20 08:09:57,972 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 583 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1312 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:09:57,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 183 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 694 Invalid, 0 Unknown, 1312 Unchecked, 1.0s Time] [2022-03-20 08:09:57,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 08:09:58,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:09:58,190 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:164) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:853) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:770) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:470) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:421) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 56 more [2022-03-20 08:09:58,193 INFO L158 Benchmark]: Toolchain (without parser) took 321024.05ms. Allocated memory was 184.5MB in the beginning and 369.1MB in the end (delta: 184.5MB). Free memory was 124.8MB in the beginning and 138.9MB in the end (delta: -14.1MB). Peak memory consumption was 171.5MB. Max. memory is 8.0GB. [2022-03-20 08:09:58,194 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 184.5MB. Free memory is still 141.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:09:58,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.72ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 124.7MB in the beginning and 225.0MB in the end (delta: -100.3MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-03-20 08:09:58,194 INFO L158 Benchmark]: Boogie Preprocessor took 39.81ms. Allocated memory is still 255.9MB. Free memory was 225.0MB in the beginning and 223.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:09:58,194 INFO L158 Benchmark]: RCFGBuilder took 254.42ms. Allocated memory is still 255.9MB. Free memory was 223.4MB in the beginning and 209.8MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-03-20 08:09:58,194 INFO L158 Benchmark]: IcfgTransformer took 25.70ms. Allocated memory is still 255.9MB. Free memory was 209.8MB in the beginning and 208.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:09:58,194 INFO L158 Benchmark]: TraceAbstraction took 320438.41ms. Allocated memory was 255.9MB in the beginning and 369.1MB in the end (delta: 113.2MB). Free memory was 208.2MB in the beginning and 138.9MB in the end (delta: 69.3MB). Peak memory consumption was 183.8MB. Max. memory is 8.0GB. [2022-03-20 08:09:58,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 184.5MB. Free memory is still 141.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 261.72ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 124.7MB in the beginning and 225.0MB in the end (delta: -100.3MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.81ms. Allocated memory is still 255.9MB. Free memory was 225.0MB in the beginning and 223.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 254.42ms. Allocated memory is still 255.9MB. Free memory was 223.4MB in the beginning and 209.8MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 25.70ms. Allocated memory is still 255.9MB. Free memory was 209.8MB in the beginning and 208.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 320438.41ms. Allocated memory was 255.9MB in the beginning and 369.1MB in the end (delta: 113.2MB). Free memory was 208.2MB in the beginning and 138.9MB in the end (delta: 69.3MB). Peak memory consumption was 183.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...