/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/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:34:11,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:34:11,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:34:11,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:34:11,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:34:11,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:34:11,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:34:11,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:34:11,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:34:11,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:34:11,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:34:11,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:34:11,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:34:11,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:34:11,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:34:11,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:34:11,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:34:11,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:34:11,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:34:11,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:34:11,130 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:34:11,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:34:11,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:34:11,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:34:11,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:34:11,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 19:34:11,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 19:34:11,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 19:34:11,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 19:34:11,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 19:34:11,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 19:34:11,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 19:34:11,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 19:34:11,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 19:34:11,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 19:34:11,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 19:34:11,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 19:34:11,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 19:34:11,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 19:34:11,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:34:11,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:34:11,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:34:11,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:34:11,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:34:11,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:34:11,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:34:11,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:34:11,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:34:11,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:34:11,164 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:34:11,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:34:11,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:34:11,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:34:11,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:34:11,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:34:11,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:34:11,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:34:11,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:34:11,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:34:11,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:34:11,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:34:11,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:34:11,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:34:11,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:34:11,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:34:11,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:34:11,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:34:11,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:34:11,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:34:11,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:34:11,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:34:11,168 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:34:11,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:34:11,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:34:11,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:34:11,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:34:11,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:34:11,402 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:34:11,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2022-03-17 19:34:11,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0ed31198/7c4fa13612e24af39557d055475a74ab/FLAGb71aa1278 [2022-03-17 19:34:11,754 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:34:11,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2022-03-17 19:34:11,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0ed31198/7c4fa13612e24af39557d055475a74ab/FLAGb71aa1278 [2022-03-17 19:34:12,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0ed31198/7c4fa13612e24af39557d055475a74ab [2022-03-17 19:34:12,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:34:12,183 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:34:12,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:34:12,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:34:12,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:34:12,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ef641f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12, skipping insertion in model container [2022-03-17 19:34:12,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:34:12,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:34:12,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i[849,862] [2022-03-17 19:34:12,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:34:12,367 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:34:12,374 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i[849,862] [2022-03-17 19:34:12,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:34:12,389 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:34:12,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12 WrapperNode [2022-03-17 19:34:12,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:34:12,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:34:12,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:34:12,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:34:12,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:34:12,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:34:12,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:34:12,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:34:12,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:34:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:34:12,465 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) [2022-03-17 19:34:12,479 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 [2022-03-17 19:34:12,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:34:12,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:34:12,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:34:12,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:34:12,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:34:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 19:34:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:34:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:34:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:34:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:34:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:34:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:34:12,545 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:34:12,546 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:34:12,671 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:34:12,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:34:12,675 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 19:34:12,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:34:12 BoogieIcfgContainer [2022-03-17 19:34:12,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:34:12,677 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:34:12,677 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:34:12,677 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:34:12,679 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:34:12" (1/1) ... [2022-03-17 19:34:12,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:34:12 BasicIcfg [2022-03-17 19:34:12,691 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:34:12,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:34:12,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:34:12,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:34:12,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:34:12" (1/4) ... [2022-03-17 19:34:12,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4297a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:34:12, skipping insertion in model container [2022-03-17 19:34:12,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:34:12" (2/4) ... [2022-03-17 19:34:12,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4297a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:34:12, skipping insertion in model container [2022-03-17 19:34:12,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:34:12" (3/4) ... [2022-03-17 19:34:12,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4297a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:34:12, skipping insertion in model container [2022-03-17 19:34:12,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:34:12" (4/4) ... [2022-03-17 19:34:12,712 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.iqvasr [2022-03-17 19:34:12,729 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:34:12,730 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:34:12,776 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:34:12,781 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 [2022-03-17 19:34:12,781 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:34:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-03-17 19:34:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:34:12,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:34:12,796 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:34:12,797 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:34:12,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:34:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash 261736565, now seen corresponding path program 1 times [2022-03-17 19:34:12,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:34:12,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494211487] [2022-03-17 19:34:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:34:12,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:34:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:12,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:34:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:34:12,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:34:12,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494211487] [2022-03-17 19:34:12,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494211487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:34:12,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:34:12,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 19:34:12,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840759799] [2022-03-17 19:34:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:34:12,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:34:12,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:34:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:34:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:34:12,969 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-03-17 19:34:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:34:12,994 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-17 19:34:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:34:12,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2022-03-17 19:34:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:34:13,000 INFO L225 Difference]: With dead ends: 42 [2022-03-17 19:34:13,000 INFO L226 Difference]: Without dead ends: 18 [2022-03-17 19:34:13,002 INFO L911 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 [2022-03-17 19:34:13,004 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 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 [2022-03-17 19:34:13,005 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:34:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-17 19:34:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-17 19:34:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-03-17 19:34:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-17 19:34:13,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-03-17 19:34:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:34:13,027 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-17 19:34:13,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-03-17 19:34:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-17 19:34:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 19:34:13,028 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:34:13,028 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:34:13,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:34:13,028 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:34:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:34:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1236111046, now seen corresponding path program 1 times [2022-03-17 19:34:13,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:34:13,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570601066] [2022-03-17 19:34:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:34:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:34:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:34:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:34:13,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:34:13,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570601066] [2022-03-17 19:34:13,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570601066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:34:13,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:34:13,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:34:13,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702925236] [2022-03-17 19:34:13,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:34:13,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:34:13,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:34:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:34:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:34:13,076 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-17 19:34:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:34:13,111 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-17 19:34:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:34:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-03-17 19:34:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:34:13,113 INFO L225 Difference]: With dead ends: 35 [2022-03-17 19:34:13,113 INFO L226 Difference]: Without dead ends: 25 [2022-03-17 19:34:13,114 INFO L911 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 [2022-03-17 19:34:13,115 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:34:13,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:34:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-17 19:34:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-03-17 19:34:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-03-17 19:34:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-03-17 19:34:13,120 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-03-17 19:34:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:34:13,120 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-03-17 19:34:13,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-17 19:34:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-03-17 19:34:13,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-17 19:34:13,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:34:13,121 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:34:13,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:34:13,121 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:34:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:34:13,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1563816184, now seen corresponding path program 1 times [2022-03-17 19:34:13,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:34:13,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654025194] [2022-03-17 19:34:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:34:13,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:34:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:34:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:34:13,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:34:13,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654025194] [2022-03-17 19:34:13,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654025194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:34:13,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880627140] [2022-03-17 19:34:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:34:13,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:34:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:34:13,168 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) [2022-03-17 19:34:13,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:34:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 19:34:13,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:34:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:34:13,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:34:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:34:13,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880627140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:34:13,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:34:13,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 19:34:13,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378099532] [2022-03-17 19:34:13,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:34:13,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 19:34:13,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:34:13,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 19:34:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 19:34:13,368 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-03-17 19:34:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:34:13,480 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-03-17 19:34:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 19:34:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 16 [2022-03-17 19:34:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:34:13,481 INFO L225 Difference]: With dead ends: 52 [2022-03-17 19:34:13,481 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 19:34:13,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-17 19:34:13,482 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:34:13,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:34:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 19:34:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-03-17 19:34:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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) [2022-03-17 19:34:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-03-17 19:34:13,488 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2022-03-17 19:34:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:34:13,488 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-03-17 19:34:13,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-03-17 19:34:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-03-17 19:34:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 19:34:13,489 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:34:13,489 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:34:13,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 19:34:13,705 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 [2022-03-17 19:34:13,706 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:34:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:34:13,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1985862862, now seen corresponding path program 2 times [2022-03-17 19:34:13,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:34:13,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043775551] [2022-03-17 19:34:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:34:13,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:34:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:34:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 19:34:13,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:34:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043775551] [2022-03-17 19:34:13,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043775551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:34:13,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:34:13,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 19:34:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531863979] [2022-03-17 19:34:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:34:13,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 19:34:13,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:34:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 19:34:13,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 19:34:13,821 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-17 19:34:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:34:13,886 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-03-17 19:34:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:34:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 22 [2022-03-17 19:34:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:34:13,888 INFO L225 Difference]: With dead ends: 41 [2022-03-17 19:34:13,888 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 19:34:13,888 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-17 19:34:13,889 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:34:13,889 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:34:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 19:34:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-17 19:34:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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) [2022-03-17 19:34:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-17 19:34:13,895 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-03-17 19:34:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:34:13,895 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-17 19:34:13,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-17 19:34:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-17 19:34:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 19:34:13,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:34:13,896 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:34:13,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 19:34:13,896 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:34:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:34:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1390832492, now seen corresponding path program 1 times [2022-03-17 19:34:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:34:13,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126159086] [2022-03-17 19:34:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:34:13,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:34:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:34:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 19:34:13,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:34:13,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126159086] [2022-03-17 19:34:13,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126159086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:34:13,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40999453] [2022-03-17 19:34:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:34:13,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:34:13,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:34:13,947 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) [2022-03-17 19:34:13,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:34:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:34:14,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 19:34:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:34:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:34:14,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:34:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:34:14,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40999453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:34:14,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:34:14,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-17 19:34:14,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752857565] [2022-03-17 19:34:14,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:34:14,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 19:34:14,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:34:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 19:34:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-17 19:34:14,139 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:34:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:34:14,371 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-03-17 19:34:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 19:34:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-17 19:34:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:34:14,372 INFO L225 Difference]: With dead ends: 99 [2022-03-17 19:34:14,372 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 19:34:14,373 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2022-03-17 19:34:14,373 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 140 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:34:14,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 43 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:34:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 19:34:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 19:34:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 19:34:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 19:34:14,374 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-03-17 19:34:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:34:14,375 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 19:34:14,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:34:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 19:34:14,375 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 19:34:14,377 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 19:34:14,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 19:34:14,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:34:14,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 19:34:14,706 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 19:34:14,706 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 19:34:14,706 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 19:34:14,707 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 19:34:14,707 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 19:34:14,707 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 19:34:14,707 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 19:34:14,707 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2022-03-17 19:34:14,707 INFO L885 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: true [2022-03-17 19:34:14,707 INFO L882 garLoopResultBuilder]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2022-03-17 19:34:14,707 INFO L882 garLoopResultBuilder]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2022-03-17 19:34:14,707 INFO L878 garLoopResultBuilder]: At program point L28-4(lines 28 32) the Hoare annotation is: (< main_~i~0 1024) [2022-03-17 19:34:14,707 INFO L882 garLoopResultBuilder]: For program point L28-1(lines 28 32) no Hoare annotation was computed. [2022-03-17 19:34:14,707 INFO L878 garLoopResultBuilder]: At program point L28-5(lines 28 32) the Hoare annotation is: (< main_~i~0 1024) [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point L28-3(lines 28 32) no Hoare annotation was computed. [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 34) no Hoare annotation was computed. [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 34) no Hoare annotation was computed. [2022-03-17 19:34:14,708 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2022-03-17 19:34:14,708 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-17 19:34:14,710 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2022-03-17 19:34:14,713 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-03-17 19:34:14,714 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 19:34:14,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:34:14 BasicIcfg [2022-03-17 19:34:14,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 19:34:14,723 INFO L158 Benchmark]: Toolchain (without parser) took 2539.91ms. Allocated memory was 216.0MB in the beginning and 260.0MB in the end (delta: 44.0MB). Free memory was 160.5MB in the beginning and 207.2MB in the end (delta: -46.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 19:34:14,723 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 216.0MB. Free memory is still 176.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 19:34:14,724 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.99ms. Allocated memory is still 216.0MB. Free memory was 160.3MB in the beginning and 188.0MB in the end (delta: -27.7MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-03-17 19:34:14,724 INFO L158 Benchmark]: Boogie Preprocessor took 18.67ms. Allocated memory is still 216.0MB. Free memory was 188.0MB in the beginning and 186.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:34:14,724 INFO L158 Benchmark]: RCFGBuilder took 264.49ms. Allocated memory is still 216.0MB. Free memory was 186.4MB in the beginning and 175.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 19:34:14,724 INFO L158 Benchmark]: IcfgTransformer took 14.00ms. Allocated memory is still 216.0MB. Free memory was 175.4MB in the beginning and 174.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:34:14,725 INFO L158 Benchmark]: TraceAbstraction took 2030.83ms. Allocated memory was 216.0MB in the beginning and 260.0MB in the end (delta: 44.0MB). Free memory was 173.8MB in the beginning and 207.2MB in the end (delta: -33.4MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. [2022-03-17 19:34:14,726 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 216.0MB. Free memory is still 176.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.99ms. Allocated memory is still 216.0MB. Free memory was 160.3MB in the beginning and 188.0MB in the end (delta: -27.7MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.67ms. Allocated memory is still 216.0MB. Free memory was 188.0MB in the beginning and 186.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 264.49ms. Allocated memory is still 216.0MB. Free memory was 186.4MB in the beginning and 175.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.00ms. Allocated memory is still 216.0MB. Free memory was 175.4MB in the beginning and 174.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2030.83ms. Allocated memory was 216.0MB in the beginning and 260.0MB in the end (delta: 44.0MB). Free memory was 173.8MB in the beginning and 207.2MB in the end (delta: -33.4MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 267 mSDsluCounter, 146 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 66 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 232 IncrementalHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 80 mSDtfsCounter, 232 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 21 PreInvPairs, 51 NumberOfFragments, 18 HoareAnnotationTreeSize, 21 FomulaSimplifications, 33 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 196 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 166 ConstructedInterpolants, 0 QuantifiedInterpolants, 284 SizeOfPredicates, 0 NumberOfNonLiveVariables, 189 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 36/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: i < 1024 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-03-17 19:34:14,750 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 0 Received shutdown request...