/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:37:29,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:37:29,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:37:29,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:37:29,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:37:29,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:37:29,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:37:29,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:37:29,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:37:29,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:37:29,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:37:29,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 05:37:29,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:37:29,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:37:29,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:37:29,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:37:29,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:37:29,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:37:29,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:37:29,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:37:29,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:37:29,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:37:29,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:37:29,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:37:29,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 05:37:29,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 05:37:29,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 05:37:29,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 05:37:29,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 05:37:29,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 05:37:29,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 05:37:29,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 05:37:29,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 05:37:29,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 05:37:29,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 05:37:29,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 05:37:29,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 05:37:29,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 05:37:29,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:37:29,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:37:29,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:37:29,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:37:29,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:37:29,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:37:29,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:37:29,703 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:37:29,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:37:29,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:37:29,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:37:29,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:37:29,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:37:29,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:37:29,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:37:29,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:37:29,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:37:29,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:37:29,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:37:29,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:37:29,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:37:29,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:37:29,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:37:29,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:37:29,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:37:29,706 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:37:29,706 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:37:30,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:37:30,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:37:30,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:37:30,138 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:37:30,139 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:37:30,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2021-05-06 05:37:30,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5bcab49/53189123c5384a7c8cdf9814231593b0/FLAG4c79e7a65 [2021-05-06 05:37:30,558 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:37:30,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2021-05-06 05:37:30,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5bcab49/53189123c5384a7c8cdf9814231593b0/FLAG4c79e7a65 [2021-05-06 05:37:30,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5bcab49/53189123c5384a7c8cdf9814231593b0 [2021-05-06 05:37:30,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:37:30,991 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:37:30,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:37:30,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:37:30,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:37:30,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:37:30" (1/1) ... [2021-05-06 05:37:30,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c4a0c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:30, skipping insertion in model container [2021-05-06 05:37:30,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:37:30" (1/1) ... [2021-05-06 05:37:31,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:37:31,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:37:31,101 WARN L224 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] [2021-05-06 05:37:31,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:37:31,111 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:37:31,119 WARN L224 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] [2021-05-06 05:37:31,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:37:31,129 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:37:31,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31 WrapperNode [2021-05-06 05:37:31,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:37:31,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:37:31,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:37:31,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:37:31,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (1/1) ... [2021-05-06 05:37:31,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (1/1) ... [2021-05-06 05:37:31,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (1/1) ... [2021-05-06 05:37:31,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (1/1) ... [2021-05-06 05:37:31,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (1/1) ... [2021-05-06 05:37:31,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (1/1) ... [2021-05-06 05:37:31,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (1/1) ... [2021-05-06 05:37:31,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:37:31,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:37:31,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:37:31,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:37:31,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:37:31,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:37:31,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:37:31,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:37:31,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:37:31,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:37:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:37:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:37:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 05:37:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 05:37:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:37:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:37:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:37:31,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:37:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:37:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:37:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:37:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:37:31,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:37:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:37:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:37:31,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:37:31,470 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 05:37:31,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:37:31 BoogieIcfgContainer [2021-05-06 05:37:31,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:37:31,472 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:37:31,472 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:37:31,473 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:37:31,475 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:37:31" (1/1) ... [2021-05-06 05:37:31,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:37:31 BasicIcfg [2021-05-06 05:37:31,491 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:37:31,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:37:31,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:37:31,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:37:31,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:37:30" (1/4) ... [2021-05-06 05:37:31,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b214a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:37:31, skipping insertion in model container [2021-05-06 05:37:31,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:31" (2/4) ... [2021-05-06 05:37:31,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b214a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:37:31, skipping insertion in model container [2021-05-06 05:37:31,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:37:31" (3/4) ... [2021-05-06 05:37:31,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b214a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:37:31, skipping insertion in model container [2021-05-06 05:37:31,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:37:31" (4/4) ... [2021-05-06 05:37:31,497 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.iJordan [2021-05-06 05:37:31,501 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:37:31,503 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:37:31,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:37:31,529 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:37:31,529 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:37:31,529 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:37:31,529 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:37:31,529 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:37:31,530 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:37:31,530 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:37:31,530 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:37:31,539 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) [2021-05-06 05:37:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 05:37:31,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:37:31,543 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:37:31,544 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:37:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:37:31,547 INFO L82 PathProgramCache]: Analyzing trace with hash 261736565, now seen corresponding path program 1 times [2021-05-06 05:37:31,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:37:31,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359893357] [2021-05-06 05:37:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:37:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:31,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:37:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:37:31,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:37:31,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359893357] [2021-05-06 05:37:31,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359893357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:37:31,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:37:31,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:37:31,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87171464] [2021-05-06 05:37:31,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:37:31,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:37:31,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:37:31,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:37:31,686 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) [2021-05-06 05:37:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:37:31,732 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-05-06 05:37:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:37:31,733 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 [2021-05-06 05:37:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:37:31,737 INFO L225 Difference]: With dead ends: 25 [2021-05-06 05:37:31,737 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 05:37:31,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:37:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 05:37:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-06 05:37:31,754 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) [2021-05-06 05:37:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-06 05:37:31,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-05-06 05:37:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:37:31,756 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-06 05:37:31,756 INFO L481 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) [2021-05-06 05:37:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-06 05:37:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 05:37:31,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:37:31,756 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:37:31,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:37:31,757 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:37:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:37:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1236111046, now seen corresponding path program 1 times [2021-05-06 05:37:31,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:37:31,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878216910] [2021-05-06 05:37:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:37:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:31,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:37:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:37:31,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:37:31,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878216910] [2021-05-06 05:37:31,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878216910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:37:31,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:37:31,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:37:31,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217436062] [2021-05-06 05:37:31,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 05:37:31,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:37:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 05:37:31,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:37:31,820 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) [2021-05-06 05:37:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:37:31,874 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-05-06 05:37:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 05:37:31,875 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 [2021-05-06 05:37:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:37:31,876 INFO L225 Difference]: With dead ends: 25 [2021-05-06 05:37:31,876 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 05:37:31,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:37:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 05:37:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-06 05:37:31,879 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) [2021-05-06 05:37:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-05-06 05:37:31,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2021-05-06 05:37:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:37:31,880 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-05-06 05:37:31,880 INFO L481 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) [2021-05-06 05:37:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-05-06 05:37:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 05:37:31,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:37:31,880 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:37:31,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:37:31,881 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:37:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:37:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1563816184, now seen corresponding path program 1 times [2021-05-06 05:37:31,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:37:31,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861187661] [2021-05-06 05:37:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:37:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:31,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:37:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:37:31,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:37:31,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861187661] [2021-05-06 05:37:31,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861187661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:37:31,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586427791] [2021-05-06 05:37:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:37:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 05:37:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:37:32,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:37:32,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:37:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:37:32,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586427791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:37:32,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:37:32,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-06 05:37:32,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110502844] [2021-05-06 05:37:32,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:37:32,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:37:32,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:37:32,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:37:32,115 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-05-06 05:37:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:37:32,198 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 05:37:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:37:32,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 [2021-05-06 05:37:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:37:32,202 INFO L225 Difference]: With dead ends: 32 [2021-05-06 05:37:32,202 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 05:37:32,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:37:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 05:37:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-05-06 05:37:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-05-06 05:37:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-05-06 05:37:32,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-05-06 05:37:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:37:32,210 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-05-06 05:37:32,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-05-06 05:37:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-05-06 05:37:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 05:37:32,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:37:32,211 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:37:32,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 05:37:32,428 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:37:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:37:32,429 INFO L82 PathProgramCache]: Analyzing trace with hash 650610378, now seen corresponding path program 2 times [2021-05-06 05:37:32,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:37:32,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241321634] [2021-05-06 05:37:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:37:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:32,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:37:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:37:32,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:37:32,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241321634] [2021-05-06 05:37:32,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241321634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:37:32,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:37:32,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:37:32,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319204008] [2021-05-06 05:37:32,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:37:32,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:37:32,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:37:32,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:37:32,535 INFO L87 Difference]: Start difference. First operand 28 states and 32 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) [2021-05-06 05:37:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:37:32,603 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-06 05:37:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:37:32,604 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 18 [2021-05-06 05:37:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:37:32,604 INFO L225 Difference]: With dead ends: 31 [2021-05-06 05:37:32,604 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 05:37:32,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:37:32,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 05:37:32,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 05:37:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-05-06 05:37:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 05:37:32,607 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2021-05-06 05:37:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:37:32,607 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 05:37:32,607 INFO L481 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) [2021-05-06 05:37:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 05:37:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:37:32,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:37:32,608 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:37:32,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 05:37:32,608 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:37:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:37:32,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1550180496, now seen corresponding path program 1 times [2021-05-06 05:37:32,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:37:32,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623902042] [2021-05-06 05:37:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:37:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:32,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:37:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:37:32,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:37:32,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623902042] [2021-05-06 05:37:32,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623902042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:37:32,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727747003] [2021-05-06 05:37:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:37:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 05:37:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:37:32,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:37:32,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:37:32,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:37:32,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:37:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 05:37:32,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727747003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:37:32,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:37:32,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-05-06 05:37:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467054840] [2021-05-06 05:37:32,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:37:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:37:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:37:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:37:32,787 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-05-06 05:37:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:37:32,883 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-05-06 05:37:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:37:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 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 22 [2021-05-06 05:37:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:37:32,885 INFO L225 Difference]: With dead ends: 40 [2021-05-06 05:37:32,885 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 05:37:32,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:37:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 05:37:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-06 05:37:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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) [2021-05-06 05:37:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-06 05:37:32,888 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2021-05-06 05:37:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:37:32,888 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-06 05:37:32,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-05-06 05:37:32,888 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-06 05:37:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 05:37:32,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:37:32,889 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:37:33,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:37:33,108 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:37:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:37:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash 253810526, now seen corresponding path program 2 times [2021-05-06 05:37:33,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:37:33,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727469246] [2021-05-06 05:37:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:37:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:33,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:37:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 05:37:33,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:37:33,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727469246] [2021-05-06 05:37:33,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727469246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:37:33,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:37:33,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:37:33,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707081650] [2021-05-06 05:37:33,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:37:33,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:37:33,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:37:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:37:33,169 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-05-06 05:37:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:37:33,236 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-05-06 05:37:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:37:33,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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 32 [2021-05-06 05:37:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:37:33,237 INFO L225 Difference]: With dead ends: 32 [2021-05-06 05:37:33,237 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:37:33,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:37:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:37:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:37:33,238 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) [2021-05-06 05:37:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:37:33,238 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-06 05:37:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:37:33,238 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:37:33,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-05-06 05:37:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:37:33,238 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:37:33,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 05:37:33,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:37:33 BasicIcfg [2021-05-06 05:37:33,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:37:33,242 INFO L168 Benchmark]: Toolchain (without parser) took 2250.78 ms. Allocated memory was 187.7 MB in the beginning and 245.4 MB in the end (delta: 57.7 MB). Free memory was 154.1 MB in the beginning and 161.4 MB in the end (delta: -7.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:33,242 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:37:33,243 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.56 ms. Allocated memory is still 187.7 MB. Free memory was 154.0 MB in the beginning and 144.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:33,243 INFO L168 Benchmark]: Boogie Preprocessor took 17.63 ms. Allocated memory is still 187.7 MB. Free memory was 144.6 MB in the beginning and 143.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:33,243 INFO L168 Benchmark]: RCFGBuilder took 322.80 ms. Allocated memory is still 187.7 MB. Free memory was 142.9 MB in the beginning and 158.0 MB in the end (delta: -15.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:33,243 INFO L168 Benchmark]: IcfgTransformer took 18.71 ms. Allocated memory is still 187.7 MB. Free memory was 158.0 MB in the beginning and 157.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:33,243 INFO L168 Benchmark]: TraceAbstraction took 1749.75 ms. Allocated memory was 187.7 MB in the beginning and 245.4 MB in the end (delta: 57.7 MB). Free memory was 156.4 MB in the beginning and 161.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 53.2 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:33,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 136.56 ms. Allocated memory is still 187.7 MB. Free memory was 154.0 MB in the beginning and 144.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.63 ms. Allocated memory is still 187.7 MB. Free memory was 144.6 MB in the beginning and 143.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.80 ms. Allocated memory is still 187.7 MB. Free memory was 142.9 MB in the beginning and 158.0 MB in the end (delta: -15.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.71 ms. Allocated memory is still 187.7 MB. Free memory was 158.0 MB in the beginning and 157.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1749.75 ms. Allocated memory was 187.7 MB in the beginning and 245.4 MB in the end (delta: 57.7 MB). Free memory was 156.4 MB in the beginning and 161.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 53.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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. VerificationResult: SAFE, OverallTime: 1711.7ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 9.6ms, AutomataDifference: 445.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 84 SDtfs, 66 SDslu, 134 SDs, 0 SdLazy, 271 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 217.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 297.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 34.5ms SsaConstructionTime, 95.7ms SatisfiabilityAnalysisTime, 490.4ms InterpolantComputationTime, 153 NumberOfCodeBlocks, 153 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 359 SizeOfPredicates, 0 NumberOfNonLiveVariables, 202 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 37/45 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...