/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/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:24:36,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:24:36,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:24:36,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:24:36,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:24:36,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:24:36,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:24:36,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:24:36,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:24:36,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:24:36,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:24:36,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 05:24:36,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:24:36,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:24:36,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:24:36,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:24:36,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:24:36,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:24:36,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:24:36,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:24:36,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:24:36,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:24:36,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:24:36,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:24:36,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 05:24:36,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 05:24:36,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 05:24:36,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 05:24:36,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 05:24:36,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 05:24:36,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 05:24:36,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 05:24:36,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 05:24:36,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 05:24:36,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 05:24:36,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 05:24:36,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 05:24:36,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 05:24:36,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:24:36,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:24:36,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:24:36,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:24:36,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:24:36,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:24:36,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:24:36,473 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:24:36,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:24:36,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:24:36,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:24:36,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:24:36,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:24:36,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:24:36,474 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:24:36,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:24:36,474 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:24:36,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:24:36,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:24:36,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:24:36,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:24:36,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:24:36,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:24:36,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:24:36,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:24:36,476 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:24:36,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:24:36,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:24:36,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:24:36,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:24:36,784 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:24:36,784 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:24:36,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2021-05-06 05:24:36,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/819648bb5/3036474a5b7d43e893f5b8431f7c3221/FLAG2d4ec1482 [2021-05-06 05:24:37,247 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:24:37,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2021-05-06 05:24:37,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/819648bb5/3036474a5b7d43e893f5b8431f7c3221/FLAG2d4ec1482 [2021-05-06 05:24:37,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/819648bb5/3036474a5b7d43e893f5b8431f7c3221 [2021-05-06 05:24:37,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:24:37,577 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:24:37,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:24:37,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:24:37,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:24:37,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6685a3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37, skipping insertion in model container [2021-05-06 05:24:37,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:24:37,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:24:37,709 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-05-06 05:24:37,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:24:37,721 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:24:37,729 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-05-06 05:24:37,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:24:37,740 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:24:37,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37 WrapperNode [2021-05-06 05:24:37,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:24:37,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:24:37,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:24:37,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:24:37,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (1/1) ... [2021-05-06 05:24:37,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:24:37,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:24:37,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:24:37,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:24:37,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (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 05:24:37,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:24:37,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:24:37,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:24:37,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:24:37,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:24:37,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:24:37,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:24:37,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 05:24:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 05:24:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:24:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:24:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:24:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-06 05:24:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:24:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:24:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:24:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:24:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:24:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:24:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:24:38,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:24:38,095 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:24:38,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:24:38 BoogieIcfgContainer [2021-05-06 05:24:38,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:24:38,096 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:24:38,096 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:24:38,097 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:24:38,098 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:24:38" (1/1) ... [2021-05-06 05:24:38,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:24:38 BasicIcfg [2021-05-06 05:24:38,108 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:24:38,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:24:38,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:24:38,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:24:38,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:24:37" (1/4) ... [2021-05-06 05:24:38,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ecfb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:24:38, skipping insertion in model container [2021-05-06 05:24:38,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:24:37" (2/4) ... [2021-05-06 05:24:38,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ecfb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:24:38, skipping insertion in model container [2021-05-06 05:24:38,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:24:38" (3/4) ... [2021-05-06 05:24:38,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ecfb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:24:38, skipping insertion in model container [2021-05-06 05:24:38,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:24:38" (4/4) ... [2021-05-06 05:24:38,113 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.iJordan [2021-05-06 05:24:38,117 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:24:38,120 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:24:38,131 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:24:38,161 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:24:38,161 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:24:38,161 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:24:38,161 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:24:38,161 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:24:38,162 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:24:38,162 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:24:38,162 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:24:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 05:24:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 05:24:38,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:24:38,175 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:24:38,176 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:24:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:24:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -423489079, now seen corresponding path program 1 times [2021-05-06 05:24:38,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:24:38,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637965786] [2021-05-06 05:24:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:24:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:38,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:24:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:38,340 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 05:24:38,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:24:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637965786] [2021-05-06 05:24:38,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637965786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:24:38,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:24:38,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:24:38,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012478106] [2021-05-06 05:24:38,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:24:38,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:24:38,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:24:38,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:24:38,371 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 05:24:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:24:38,421 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-06 05:24:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:24:38,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-06 05:24:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:24:38,431 INFO L225 Difference]: With dead ends: 20 [2021-05-06 05:24:38,431 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 05:24:38,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:24:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 05:24:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 05:24:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 05:24:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-06 05:24:38,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-06 05:24:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:24:38,455 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-06 05:24:38,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 05:24:38,455 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-06 05:24:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 05:24:38,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:24:38,456 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:24:38,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:24:38,457 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:24:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:24:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -422565558, now seen corresponding path program 1 times [2021-05-06 05:24:38,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:24:38,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19670910] [2021-05-06 05:24:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:24:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:38,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:24:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:38,631 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 05:24:38,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:24:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19670910] [2021-05-06 05:24:38,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19670910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:24:38,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:24:38,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:24:38,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496845196] [2021-05-06 05:24:38,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:24:38,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:24:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:24:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:24:38,634 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 05:24:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:24:38,733 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-05-06 05:24:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:24:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-05-06 05:24:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:24:38,734 INFO L225 Difference]: With dead ends: 18 [2021-05-06 05:24:38,734 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 05:24:38,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:24:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 05:24:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 05:24:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 05:24:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-06 05:24:38,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-06 05:24:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:24:38,737 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-06 05:24:38,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 05:24:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-06 05:24:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 05:24:38,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:24:38,738 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:24:38,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:24:38,738 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:24:38,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:24:38,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1744981802, now seen corresponding path program 1 times [2021-05-06 05:24:38,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:24:38,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446485868] [2021-05-06 05:24:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:24:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:38,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:24:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:24:38,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:24:38,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446485868] [2021-05-06 05:24:38,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446485868] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:24:38,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:24:38,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:24:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222401648] [2021-05-06 05:24:38,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 05:24:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:24:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 05:24:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:24:38,788 INFO L87 Difference]: Start difference. First operand 15 states and 16 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 05:24:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:24:38,835 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-05-06 05:24:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 05:24:38,836 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 05:24:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:24:38,836 INFO L225 Difference]: With dead ends: 17 [2021-05-06 05:24:38,836 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 05:24:38,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:24:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 05:24:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-05-06 05:24:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 05:24:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-06 05:24:38,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2021-05-06 05:24:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:24:38,839 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-06 05:24:38,839 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 05:24:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-06 05:24:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 05:24:38,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:24:38,840 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:24:38,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:24:38,840 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:24:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:24:38,841 INFO L82 PathProgramCache]: Analyzing trace with hash -857478121, now seen corresponding path program 1 times [2021-05-06 05:24:38,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:24:38,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209665577] [2021-05-06 05:24:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:24:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:39,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:24:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:39,059 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 05:24:39,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:24:39,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209665577] [2021-05-06 05:24:39,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209665577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:24:39,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636436757] [2021-05-06 05:24:39,060 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 05:24:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:24:39,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:24:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:39,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:39,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:39,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:39,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:39,279 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 05:24:39,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636436757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:24:39,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:24:39,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-06 05:24:39,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173372611] [2021-05-06 05:24:39,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 05:24:39,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:24:39,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 05:24:39,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-06 05:24:39,281 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 05:24:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:24:39,471 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-06 05:24:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:24:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 14 [2021-05-06 05:24:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:24:39,474 INFO L225 Difference]: With dead ends: 21 [2021-05-06 05:24:39,474 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 05:24:39,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-06 05:24:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 05:24:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-06 05:24:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 05:24:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-06 05:24:39,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-05-06 05:24:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:24:39,481 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-06 05:24:39,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 05:24:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-06 05:24:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:24:39,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:24:39,482 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:24:39,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:24:39,697 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:24:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:24:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash -308814103, now seen corresponding path program 1 times [2021-05-06 05:24:39,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:24:39,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477004661] [2021-05-06 05:24:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:24:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:39,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:24:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:24:39,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:24:39,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477004661] [2021-05-06 05:24:39,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477004661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:24:39,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888282129] [2021-05-06 05:24:39,763 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 05:24:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:39,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 05:24:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:24:39,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:39,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:24:39,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888282129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:24:39,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:24:39,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-06 05:24:39,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070474846] [2021-05-06 05:24:39,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:24:39,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:24:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:24:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:24:39,863 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 05:24:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:24:39,920 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-06 05:24:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:24:39,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 17 [2021-05-06 05:24:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:24:39,921 INFO L225 Difference]: With dead ends: 20 [2021-05-06 05:24:39,921 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 05:24:39,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:24:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 05:24:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-06 05:24:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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 05:24:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-06 05:24:39,924 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2021-05-06 05:24:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:24:39,924 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-06 05:24:39,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 05:24:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-06 05:24:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:24:39,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:24:39,924 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:24:40,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:24:40,143 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:24:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:24:40,144 INFO L82 PathProgramCache]: Analyzing trace with hash 578689578, now seen corresponding path program 2 times [2021-05-06 05:24:40,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:24:40,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649294756] [2021-05-06 05:24:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:24:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:40,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:24:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:24:40,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:24:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649294756] [2021-05-06 05:24:40,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649294756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:24:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629111498] [2021-05-06 05:24:40,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:24:40,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:24:40,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:24:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 05:24:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:24:40,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:40,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:40,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:40,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:40,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:40,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:40,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:24:40,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629111498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:24:40,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:24:40,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-05-06 05:24:40,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727794172] [2021-05-06 05:24:40,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 05:24:40,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:24:40,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 05:24:40,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-06 05:24:40,506 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 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 05:24:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:24:40,921 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 05:24:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 05:24:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 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 17 [2021-05-06 05:24:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:24:40,922 INFO L225 Difference]: With dead ends: 28 [2021-05-06 05:24:40,922 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 05:24:40,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-05-06 05:24:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 05:24:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 05:24:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 05:24:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 05:24:40,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2021-05-06 05:24:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:24:40,925 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 05:24:40,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 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 05:24:40,925 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 05:24:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 05:24:40,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:24:40,926 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:24:41,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:24:41,126 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:24:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:24:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1901095946, now seen corresponding path program 2 times [2021-05-06 05:24:41,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:24:41,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583417402] [2021-05-06 05:24:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:24:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:41,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:24:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:24:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:24:41,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:24:41,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583417402] [2021-05-06 05:24:41,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583417402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:24:41,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648565464] [2021-05-06 05:24:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:24:41,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:24:41,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:24:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 05:24:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:24:41,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:41,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:41,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:41,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:24:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:24:41,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648565464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:24:41,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:24:41,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-06 05:24:41,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329421202] [2021-05-06 05:24:41,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:24:41,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:24:41,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:24:41,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:24:41,275 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 05:24:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:24:41,354 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-05-06 05:24:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:24:41,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 20 [2021-05-06 05:24:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:24:41,355 INFO L225 Difference]: With dead ends: 24 [2021-05-06 05:24:41,355 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 05:24:41,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:24:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 05:24:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 05:24:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 05:24:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-05-06 05:24:41,368 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-05-06 05:24:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:24:41,369 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-05-06 05:24:41,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 05:24:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-05-06 05:24:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 05:24:41,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:24:41,370 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:24:41,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:24:41,587 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:24:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:24:41,588 INFO L82 PathProgramCache]: Analyzing trace with hash 344303561, now seen corresponding path program 3 times [2021-05-06 05:24:41,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:24:41,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976176088] [2021-05-06 05:24:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:24:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 05:24:41,605 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 05:24:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 05:24:41,612 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 05:24:41,624 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 05:24:41,624 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 05:24:41,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-06 05:24:41,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:24:41 BasicIcfg [2021-05-06 05:24:41,641 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:24:41,642 INFO L168 Benchmark]: Toolchain (without parser) took 4064.90 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 146.8 MB in the beginning and 85.6 MB in the end (delta: 61.2 MB). Peak memory consumption was 98.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:24:41,642 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 163.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:24:41,642 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.02 ms. Allocated memory is still 180.4 MB. Free memory was 146.6 MB in the beginning and 137.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 05:24:41,642 INFO L168 Benchmark]: Boogie Preprocessor took 19.18 ms. Allocated memory is still 180.4 MB. Free memory was 137.2 MB in the beginning and 135.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:24:41,642 INFO L168 Benchmark]: RCFGBuilder took 334.38 ms. Allocated memory is still 180.4 MB. Free memory was 135.7 MB in the beginning and 151.5 MB in the end (delta: -15.7 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:24:41,642 INFO L168 Benchmark]: IcfgTransformer took 11.81 ms. Allocated memory is still 180.4 MB. Free memory was 151.5 MB in the beginning and 150.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:24:41,642 INFO L168 Benchmark]: TraceAbstraction took 3532.37 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 149.9 MB in the beginning and 85.6 MB in the end (delta: 64.3 MB). Peak memory consumption was 102.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:24:41,643 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 163.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 162.02 ms. Allocated memory is still 180.4 MB. Free memory was 146.6 MB in the beginning and 137.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.18 ms. Allocated memory is still 180.4 MB. Free memory was 137.2 MB in the beginning and 135.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.38 ms. Allocated memory is still 180.4 MB. Free memory was 135.7 MB in the beginning and 151.5 MB in the end (delta: -15.7 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.81 ms. Allocated memory is still 180.4 MB. Free memory was 151.5 MB in the beginning and 150.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3532.37 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 149.9 MB in the beginning and 85.6 MB in the end (delta: 64.3 MB). Peak memory consumption was 102.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=0, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=1, n=4, n=2] [L26] COND FALSE !(i==4) VAL [i=1, n=2, n=4] [L24] i++ VAL [i=2, n=2, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=2, n=4, n=4] [L26] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L24] i++ VAL [i=3, n=4, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=3, n=6, n=4] [L26] COND FALSE !(i==4) VAL [i=3, n=4, n=6] [L24] i++ VAL [i=4, n=6, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=4, n=4, n=8] [L26] COND TRUE i==4 [L26] sn=-10 VAL [i=4, n=-10, n=4] [L24] i++ VAL [i=5, n=-10, n=4] [L24] COND FALSE !(i<=n) VAL [i=5, n=-10, n=4] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3465.3ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 10.8ms, AutomataDifference: 988.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 80 SDtfs, 108 SDslu, 131 SDs, 0 SdLazy, 339 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 259.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1022.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=6, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 38.1ms AutomataMinimizationTime, 7 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.8ms SsaConstructionTime, 188.5ms SatisfiabilityAnalysisTime, 1117.4ms InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 744 SizeOfPredicates, 4 NumberOfNonLiveVariables, 354 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 17/47 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...