/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/nla-digbench-scaling/divbin2_unwindbound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:03:18,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:03:18,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:03:18,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:03:18,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:03:18,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:03:18,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:03:18,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:03:18,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:03:18,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:03:18,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:03:18,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:03:18,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:03:18,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:03:18,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:03:18,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:03:18,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:03:18,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:03:18,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:03:18,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:03:18,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:03:18,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:03:18,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:03:18,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:03:18,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:03:18,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:03:18,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:03:18,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:03:18,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:03:18,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:03:18,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:03:18,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:03:18,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:03:18,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:03:18,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:03:18,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:03:18,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:03:18,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:03:18,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:03:18,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:03:18,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:03:18,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:03:18,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:03:18,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:03:18,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:03:18,157 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:03:18,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:03:18,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:03:18,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:03:18,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:03:18,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:03:18,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:03:18,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:03:18,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:03:18,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:03:18,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:03:18,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:03:18,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:03:18,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:03:18,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:03:18,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:03:18,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:03:18,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:03:18,160 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:03:18,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:03:18,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:03:18,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:03:18,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:03:18,485 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:03:18,485 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:03:18,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound2.i [2021-05-02 20:03:18,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c0b1ebe/ac915c492fd3499d9874876c6288b39f/FLAG98f99690a [2021-05-02 20:03:19,056 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:03:19,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound2.i [2021-05-02 20:03:19,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c0b1ebe/ac915c492fd3499d9874876c6288b39f/FLAG98f99690a [2021-05-02 20:03:19,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c0b1ebe/ac915c492fd3499d9874876c6288b39f [2021-05-02 20:03:19,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:03:19,538 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:03:19,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:03:19,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:03:19,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:03:19,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3f10a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19, skipping insertion in model container [2021-05-02 20:03:19,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:03:19,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:03:19,679 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound2.i[959,972] [2021-05-02 20:03:19,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:03:19,697 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:03:19,723 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound2.i[959,972] [2021-05-02 20:03:19,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:03:19,760 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:03:19,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19 WrapperNode [2021-05-02 20:03:19,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:03:19,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:03:19,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:03:19,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:03:19,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (1/1) ... [2021-05-02 20:03:19,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:03:19,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:03:19,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:03:19,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:03:19,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (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 [2021-05-02 20:03:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:03:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:03:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:03:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:03:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:03:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:03:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:03:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:03:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:03:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:03:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:03:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:03:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:03:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:03:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:03:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:03:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:03:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:03:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:03:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:03:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:03:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:03:20,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:03:20,088 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:03:20,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:03:20 BoogieIcfgContainer [2021-05-02 20:03:20,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:03:20,090 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:03:20,091 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:03:20,091 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:03:20,100 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:03:20" (1/1) ... [2021-05-02 20:03:20,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:03:20 BasicIcfg [2021-05-02 20:03:20,129 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:03:20,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:03:20,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:03:20,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:03:20,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:03:19" (1/4) ... [2021-05-02 20:03:20,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237bf997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:03:20, skipping insertion in model container [2021-05-02 20:03:20,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:03:19" (2/4) ... [2021-05-02 20:03:20,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237bf997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:03:20, skipping insertion in model container [2021-05-02 20:03:20,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:03:20" (3/4) ... [2021-05-02 20:03:20,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237bf997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:03:20, skipping insertion in model container [2021-05-02 20:03:20,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:03:20" (4/4) ... [2021-05-02 20:03:20,136 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.iJordan [2021-05-02 20:03:20,140 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:03:20,160 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:03:20,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:03:20,190 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:03:20,190 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:03:20,190 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:03:20,190 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:03:20,190 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:03:20,191 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:03:20,191 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:03:20,191 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:03:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:03:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:03:20,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:20,209 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:20,209 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:20,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2021-05-02 20:03:20,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:20,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255002966] [2021-05-02 20:03:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:20,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:03:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:20,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255002966] [2021-05-02 20:03:20,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255002966] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:20,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:20,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:03:20,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547915124] [2021-05-02 20:03:20,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:03:20,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:03:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:03:20,464 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-05-02 20:03:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:20,563 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-05-02 20:03:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:03:20,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 20:03:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:20,574 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:03:20,574 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 20:03:20,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:03:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 20:03:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 20:03:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-02 20:03:20,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-02 20:03:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:20,608 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-02 20:03:20,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-05-02 20:03:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-02 20:03:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 20:03:20,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:20,609 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:20,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:03:20,610 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:20,612 INFO L82 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2021-05-02 20:03:20,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:20,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481016215] [2021-05-02 20:03:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:20,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:03:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:20,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:20,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481016215] [2021-05-02 20:03:20,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481016215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:20,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:20,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:03:20,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884438932] [2021-05-02 20:03:20,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:03:20,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:20,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:03:20,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:03:20,806 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-05-02 20:03:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:20,914 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-05-02 20:03:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:20,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) Word has length 14 [2021-05-02 20:03:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:20,916 INFO L225 Difference]: With dead ends: 23 [2021-05-02 20:03:20,916 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 20:03:20,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 20:03:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 20:03:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-02 20:03:20,925 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-02 20:03:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:20,925 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-02 20:03:20,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-05-02 20:03:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-02 20:03:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 20:03:20,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:20,927 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:20,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:03:20,929 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:20,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2021-05-02 20:03:20,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:20,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964860526] [2021-05-02 20:03:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:20,963 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:20,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810656651] [2021-05-02 20:03:20,964 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 [2021-05-02 20:03:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:03:21,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:21,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:21,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:21,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964860526] [2021-05-02 20:03:21,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:21,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810656651] [2021-05-02 20:03:21,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810656651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:21,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:21,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:03:21,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813747981] [2021-05-02 20:03:21,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:03:21,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:03:21,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:03:21,206 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2021-05-02 20:03:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:21,231 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-02 20:03:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:03:21,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) Word has length 15 [2021-05-02 20:03:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:21,234 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:03:21,234 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:03:21,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:03:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:03:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 20:03:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-02 20:03:21,241 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-02 20:03:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:21,241 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-02 20:03:21,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2021-05-02 20:03:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-02 20:03:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 20:03:21,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:21,244 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:21,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:03:21,468 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2021-05-02 20:03:21,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:21,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075709241] [2021-05-02 20:03:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:21,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:21,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123692025] [2021-05-02 20:03:21,479 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 [2021-05-02 20:03:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:03:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:21,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:21,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075709241] [2021-05-02 20:03:21,680 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:21,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123692025] [2021-05-02 20:03:21,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123692025] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:21,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:21,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:03:21,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383948403] [2021-05-02 20:03:21,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:03:21,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:03:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:21,682 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:21,731 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-02 20:03:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:21,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 20:03:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:21,734 INFO L225 Difference]: With dead ends: 33 [2021-05-02 20:03:21,734 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:03:21,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:03:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:03:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:03:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-02 20:03:21,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-02 20:03:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:21,739 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-02 20:03:21,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-02 20:03:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 20:03:21,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:21,740 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:21,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:21,957 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2021-05-02 20:03:21,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:21,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926228470] [2021-05-02 20:03:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:21,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:21,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947710865] [2021-05-02 20:03:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 20:03:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:03:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:22,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:22,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:22,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926228470] [2021-05-02 20:03:22,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:22,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947710865] [2021-05-02 20:03:22,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947710865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:22,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:22,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:03:22,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436002414] [2021-05-02 20:03:22,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:03:22,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:22,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:03:22,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:03:22,117 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-05-02 20:03:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:22,141 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:03:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) Word has length 17 [2021-05-02 20:03:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:22,143 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:03:22,143 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:03:22,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:03:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:03:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 20:03:22,157 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-02 20:03:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:22,158 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 20:03:22,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-05-02 20:03:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 20:03:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:03:22,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:22,160 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:22,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:22,373 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:22,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2021-05-02 20:03:22,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:22,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734996672] [2021-05-02 20:03:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:22,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:22,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352848510] [2021-05-02 20:03:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 20:03:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:22,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:03:22,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:22,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:22,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:22,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734996672] [2021-05-02 20:03:22,590 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:22,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352848510] [2021-05-02 20:03:22,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352848510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:03:22,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:03:22,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:03:22,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338754178] [2021-05-02 20:03:22,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:03:22,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:03:22,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:22,592 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:22,670 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 20:03:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:22,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 20:03:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:22,672 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:03:22,672 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:03:22,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:03:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:03:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 20:03:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:03:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-05-02 20:03:22,684 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 18 [2021-05-02 20:03:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:22,685 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-05-02 20:03:22,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:03:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-05-02 20:03:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 20:03:22,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:22,686 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:22,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:22,911 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:22,911 INFO L82 PathProgramCache]: Analyzing trace with hash 461534109, now seen corresponding path program 1 times [2021-05-02 20:03:22,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:22,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004458354] [2021-05-02 20:03:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:22,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:22,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342925508] [2021-05-02 20:03:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:22,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:03:22,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:03:23,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004458354] [2021-05-02 20:03:23,037 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:23,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342925508] [2021-05-02 20:03:23,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342925508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:23,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:23,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:03:23,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038181890] [2021-05-02 20:03:23,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:03:23,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:23,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:03:23,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:03:23,038 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:23,052 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-02 20:03:23,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:03:23,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-02 20:03:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:23,053 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:03:23,053 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:03:23,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:03:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:03:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:03:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:03:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-02 20:03:23,056 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-02 20:03:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:23,057 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-02 20:03:23,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-02 20:03:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 20:03:23,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:03:23,058 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:03:23,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 20:03:23,285 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:03:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:03:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash -269721504, now seen corresponding path program 1 times [2021-05-02 20:03:23,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:03:23,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622651845] [2021-05-02 20:03:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:03:23,294 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:03:23,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058319580] [2021-05-02 20:03:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:03:23,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:03:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:03:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:03:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:03:23,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:03:23,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622651845] [2021-05-02 20:03:23,446 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:03:23,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058319580] [2021-05-02 20:03:23,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058319580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:03:23,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:03:23,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:03:23,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758257743] [2021-05-02 20:03:23,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:03:23,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:03:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:03:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:03:23,448 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:03:23,474 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-05-02 20:03:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:03:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-02 20:03:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:03:23,475 INFO L225 Difference]: With dead ends: 16 [2021-05-02 20:03:23,475 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:03:23,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:03:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:03:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:03:23,476 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) [2021-05-02 20:03:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:03:23,476 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-05-02 20:03:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:03:23,476 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:03:23,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:03:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:03:23,476 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:03:23,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:03:23,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:03:23 BasicIcfg [2021-05-02 20:03:23,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:03:23,705 INFO L168 Benchmark]: Toolchain (without parser) took 4166.94 ms. Allocated memory was 192.9 MB in the beginning and 269.5 MB in the end (delta: 76.5 MB). Free memory was 157.6 MB in the beginning and 146.2 MB in the end (delta: 11.5 MB). Peak memory consumption was 89.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:23,705 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 192.9 MB. Free memory is still 174.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:03:23,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.39 ms. Allocated memory is still 192.9 MB. Free memory was 157.4 MB in the beginning and 176.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:23,705 INFO L168 Benchmark]: Boogie Preprocessor took 23.19 ms. Allocated memory is still 192.9 MB. Free memory was 176.1 MB in the beginning and 174.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:23,705 INFO L168 Benchmark]: RCFGBuilder took 305.11 ms. Allocated memory is still 192.9 MB. Free memory was 174.7 MB in the beginning and 159.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:23,705 INFO L168 Benchmark]: IcfgTransformer took 39.12 ms. Allocated memory is still 192.9 MB. Free memory was 159.3 MB in the beginning and 157.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:23,706 INFO L168 Benchmark]: TraceAbstraction took 3573.52 ms. Allocated memory was 192.9 MB in the beginning and 269.5 MB in the end (delta: 76.5 MB). Free memory was 157.5 MB in the beginning and 146.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. [2021-05-02 20:03:23,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 192.9 MB. Free memory is still 174.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 218.39 ms. Allocated memory is still 192.9 MB. Free memory was 157.4 MB in the beginning and 176.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.19 ms. Allocated memory is still 192.9 MB. Free memory was 176.1 MB in the beginning and 174.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 305.11 ms. Allocated memory is still 192.9 MB. Free memory was 174.7 MB in the beginning and 159.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 39.12 ms. Allocated memory is still 192.9 MB. Free memory was 159.3 MB in the beginning and 157.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3573.52 ms. Allocated memory was 192.9 MB in the beginning and 269.5 MB in the end (delta: 76.5 MB). Free memory was 157.5 MB in the beginning and 146.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3513.4ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 16.1ms, AutomataDifference: 472.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 182 SDtfs, 47 SDslu, 332 SDs, 0 SdLazy, 196 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 244.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 243.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 63.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 61.4ms SsaConstructionTime, 247.4ms SatisfiabilityAnalysisTime, 909.8ms InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 478 SizeOfPredicates, 11 NumberOfNonLiveVariables, 641 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 11/16 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...