/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:06:35,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:06:35,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:06:35,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:06:35,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:06:35,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:06:35,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:06:35,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:06:35,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:06:35,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:06:35,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:06:35,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:06:35,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:06:35,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:06:35,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:06:35,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:06:35,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:06:35,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:06:35,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:06:35,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:06:35,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:06:35,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:06:35,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:06:35,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:06:35,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:06:35,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:06:35,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:06:35,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:06:35,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:06:35,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:06:35,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:06:35,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:06:35,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:06:35,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:06:35,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:06:35,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:06:35,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:06:35,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:06:35,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:06:35,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:06:35,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:06:35,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:06:35,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:06:35,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:06:35,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:06:35,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:06:35,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:06:35,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:06:35,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:06:35,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:06:35,109 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:06:35,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:06:35,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:06:35,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:06:35,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:06:35,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:06:35,402 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:06:35,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2021-05-02 18:06:35,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e82d5a9/34c35cd83e494608b325cc2736202c58/FLAGae8a8a7ee [2021-05-02 18:06:35,936 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:06:35,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2021-05-02 18:06:35,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e82d5a9/34c35cd83e494608b325cc2736202c58/FLAGae8a8a7ee [2021-05-02 18:06:36,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01e82d5a9/34c35cd83e494608b325cc2736202c58 [2021-05-02 18:06:36,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:06:36,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:06:36,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:06:36,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:06:36,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:06:36,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697aad86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36, skipping insertion in model container [2021-05-02 18:06:36,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:06:36,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:06:36,560 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1126,1139] [2021-05-02 18:06:36,566 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1880,1893] [2021-05-02 18:06:36,568 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[2415,2428] [2021-05-02 18:06:36,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:06:36,575 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:06:36,618 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1126,1139] [2021-05-02 18:06:36,621 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1880,1893] [2021-05-02 18:06:36,623 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[2415,2428] [2021-05-02 18:06:36,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:06:36,637 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:06:36,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36 WrapperNode [2021-05-02 18:06:36,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:06:36,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:06:36,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:06:36,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:06:36,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (1/1) ... [2021-05-02 18:06:36,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:06:36,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:06:36,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:06:36,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:06:36,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (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 18:06:36,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:06:36,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:06:36,765 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:06:36,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:06:36,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:06:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:06:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:06:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:06:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:06:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:06:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:06:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 18:06:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:06:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:06:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:06:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:06:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:06:37,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:06:37,039 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-02 18:06:37,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:37 BoogieIcfgContainer [2021-05-02 18:06:37,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:06:37,042 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:06:37,042 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:06:37,042 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:06:37,045 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:37" (1/1) ... [2021-05-02 18:06:37,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:06:37 BasicIcfg [2021-05-02 18:06:37,063 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:06:37,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:06:37,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:06:37,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:06:37,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:06:36" (1/4) ... [2021-05-02 18:06:37,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa14251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:06:37, skipping insertion in model container [2021-05-02 18:06:37,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:36" (2/4) ... [2021-05-02 18:06:37,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa14251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:06:37, skipping insertion in model container [2021-05-02 18:06:37,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:37" (3/4) ... [2021-05-02 18:06:37,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa14251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:06:37, skipping insertion in model container [2021-05-02 18:06:37,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:06:37" (4/4) ... [2021-05-02 18:06:37,069 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.cJordan [2021-05-02 18:06:37,074 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:06:37,077 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-05-02 18:06:37,091 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-02 18:06:37,108 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:06:37,108 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:06:37,108 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:06:37,108 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:06:37,108 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:06:37,108 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:06:37,108 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:06:37,108 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:06:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:06:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:06:37,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:37,126 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:37,126 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:37,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:37,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1229069612, now seen corresponding path program 1 times [2021-05-02 18:06:37,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:37,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677718032] [2021-05-02 18:06:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:37,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:37,362 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 18:06:37,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:37,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677718032] [2021-05-02 18:06:37,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677718032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:37,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:37,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:06:37,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895176058] [2021-05-02 18:06:37,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:06:37,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:37,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:06:37,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:06:37,381 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:37,538 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-05-02 18:06:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:06:37,539 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 18:06:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:37,544 INFO L225 Difference]: With dead ends: 42 [2021-05-02 18:06:37,544 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 18:06:37,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:06:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 18:06:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-05-02 18:06:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-05-02 18:06:37,567 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 13 [2021-05-02 18:06:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:37,567 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-05-02 18:06:37,567 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-05-02 18:06:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 18:06:37,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:37,568 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:37,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:06:37,569 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash -584114146, now seen corresponding path program 1 times [2021-05-02 18:06:37,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:37,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657775448] [2021-05-02 18:06:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:37,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:37,682 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 18:06:37,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:37,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657775448] [2021-05-02 18:06:37,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657775448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:37,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:37,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 18:06:37,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221379995] [2021-05-02 18:06:37,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 18:06:37,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 18:06:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:06:37,687 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:37,767 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-05-02 18:06:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:06:37,767 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 18:06:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:37,768 INFO L225 Difference]: With dead ends: 49 [2021-05-02 18:06:37,768 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 18:06:37,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:06:37,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 18:06:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-05-02 18:06:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-05-02 18:06:37,772 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 14 [2021-05-02 18:06:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:37,772 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-05-02 18:06:37,772 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-05-02 18:06:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 18:06:37,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:37,773 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:37,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:06:37,773 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -583131043, now seen corresponding path program 1 times [2021-05-02 18:06:37,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:37,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169124815] [2021-05-02 18:06:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:37,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:37,844 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 18:06:37,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:37,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169124815] [2021-05-02 18:06:37,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169124815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:37,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:37,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:06:37,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911801484] [2021-05-02 18:06:37,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:06:37,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:37,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:06:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:06:37,846 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:37,914 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-05-02 18:06:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:06:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 18:06:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:37,915 INFO L225 Difference]: With dead ends: 40 [2021-05-02 18:06:37,915 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 18:06:37,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:06:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 18:06:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-05-02 18:06:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-02 18:06:37,920 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2021-05-02 18:06:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:37,920 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-02 18:06:37,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-02 18:06:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:06:37,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:37,921 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:37,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 18:06:37,921 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:37,922 INFO L82 PathProgramCache]: Analyzing trace with hash -926867857, now seen corresponding path program 1 times [2021-05-02 18:06:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:37,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194867709] [2021-05-02 18:06:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:37,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:06:38,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:38,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194867709] [2021-05-02 18:06:38,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194867709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:38,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:38,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:06:38,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338121944] [2021-05-02 18:06:38,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:06:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:06:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:06:38,005 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:38,056 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 18:06:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:06:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 18:06:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:38,057 INFO L225 Difference]: With dead ends: 34 [2021-05-02 18:06:38,057 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 18:06:38,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:06:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 18:06:38,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-05-02 18:06:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 18:06:38,060 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2021-05-02 18:06:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:38,060 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 18:06:38,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 18:06:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:06:38,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:38,061 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:38,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 18:06:38,061 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:38,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1116217685, now seen corresponding path program 1 times [2021-05-02 18:06:38,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:38,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714152179] [2021-05-02 18:06:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:38,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:38,513 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 18:06:38,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:38,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714152179] [2021-05-02 18:06:38,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714152179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:38,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:38,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 18:06:38,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249024001] [2021-05-02 18:06:38,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 18:06:38,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 18:06:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:06:38,514 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:38,645 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-05-02 18:06:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:06:38,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 18:06:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:38,646 INFO L225 Difference]: With dead ends: 29 [2021-05-02 18:06:38,646 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 18:06:38,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:06:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 18:06:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 18:06:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 18:06:38,648 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2021-05-02 18:06:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:38,648 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 18:06:38,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 18:06:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 18:06:38,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:38,649 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:38,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 18:06:38,649 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -250737614, now seen corresponding path program 1 times [2021-05-02 18:06:38,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:38,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176917354] [2021-05-02 18:06:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:38,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:38,707 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 18:06:38,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:38,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176917354] [2021-05-02 18:06:38,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176917354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:38,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:38,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:06:38,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039688227] [2021-05-02 18:06:38,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:06:38,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:38,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:06:38,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:06:38,709 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:38,793 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 18:06:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:06:38,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 18:06:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:38,794 INFO L225 Difference]: With dead ends: 40 [2021-05-02 18:06:38,794 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 18:06:38,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:06:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 18:06:38,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2021-05-02 18:06:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-05-02 18:06:38,797 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-05-02 18:06:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:38,797 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-05-02 18:06:38,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:06:38,798 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-05-02 18:06:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 18:06:38,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:38,798 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:38,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 18:06:38,798 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1056654950, now seen corresponding path program 1 times [2021-05-02 18:06:38,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:38,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941764559] [2021-05-02 18:06:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:38,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:06:38,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:38,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941764559] [2021-05-02 18:06:38,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941764559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:06:38,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675231636] [2021-05-02 18:06:38,924 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 18:06:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:39,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 18:06:39,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:06:39,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:06:39,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675231636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:06:39,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:06:39,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-05-02 18:06:39,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525080162] [2021-05-02 18:06:39,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:06:39,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:06:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:06:39,185 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 1 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 18:06:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:39,336 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 18:06:39,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:06:39,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 1 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 22 [2021-05-02 18:06:39,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:39,338 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:06:39,338 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:06:39,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:06:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:06:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:06:39,339 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 18:06:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:06:39,339 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-05-02 18:06:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:39,339 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:06:39,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 1 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 18:06:39,339 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:06:39,339 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:06:39,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 18:06:39,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:06:39 BasicIcfg [2021-05-02 18:06:39,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:06:39,544 INFO L168 Benchmark]: Toolchain (without parser) took 3102.64 ms. Allocated memory was 219.2 MB in the beginning and 307.2 MB in the end (delta: 88.1 MB). Free memory was 184.2 MB in the beginning and 245.3 MB in the end (delta: -61.2 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:39,544 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 219.2 MB. Free memory is still 201.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:06:39,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.41 ms. Allocated memory is still 219.2 MB. Free memory was 184.0 MB in the beginning and 201.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:39,544 INFO L168 Benchmark]: Boogie Preprocessor took 31.28 ms. Allocated memory is still 219.2 MB. Free memory was 201.4 MB in the beginning and 199.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:39,545 INFO L168 Benchmark]: RCFGBuilder took 371.01 ms. Allocated memory is still 219.2 MB. Free memory was 199.6 MB in the beginning and 180.4 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:39,545 INFO L168 Benchmark]: IcfgTransformer took 21.64 ms. Allocated memory is still 219.2 MB. Free memory was 180.4 MB in the beginning and 179.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:39,545 INFO L168 Benchmark]: TraceAbstraction took 2478.98 ms. Allocated memory was 219.2 MB in the beginning and 307.2 MB in the end (delta: 88.1 MB). Free memory was 178.3 MB in the beginning and 245.3 MB in the end (delta: -67.0 MB). Peak memory consumption was 21.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:39,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 219.2 MB. Free memory is still 201.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 192.41 ms. Allocated memory is still 219.2 MB. Free memory was 184.0 MB in the beginning and 201.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.28 ms. Allocated memory is still 219.2 MB. Free memory was 201.4 MB in the beginning and 199.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 371.01 ms. Allocated memory is still 219.2 MB. Free memory was 199.6 MB in the beginning and 180.4 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * IcfgTransformer took 21.64 ms. Allocated memory is still 219.2 MB. Free memory was 180.4 MB in the beginning and 179.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2478.98 ms. Allocated memory was 219.2 MB in the beginning and 307.2 MB in the end (delta: 88.1 MB). Free memory was 178.3 MB in the beginning and 245.3 MB in the end (delta: -67.0 MB). Peak memory consumption was 21.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 110]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 73]: 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 3 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2434.9ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 11.1ms, AutomataDifference: 755.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 188 SDtfs, 144 SDslu, 267 SDs, 0 SdLazy, 397 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 442.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 477.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.7ms AutomataMinimizationTime, 7 MinimizatonAttempts, 44 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 44.0ms SsaConstructionTime, 198.7ms SatisfiabilityAnalysisTime, 998.0ms InterpolantComputationTime, 141 NumberOfCodeBlocks, 141 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 1604 SizeOfPredicates, 3 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 2/4 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...