/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+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:52:14,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:52:14,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:52:14,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:52:14,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:52:14,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:52:14,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:52:14,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:52:14,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:52:14,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:52:14,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:52:14,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 05:52:14,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:52:14,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:52:14,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:52:14,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:52:14,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:52:14,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:52:14,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:52:14,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:52:14,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:52:14,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:52:14,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:52:14,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:52:14,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:52:14,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:52:14,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:52:14,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:52:14,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:52:14,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:52:14,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:52:14,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:52:14,132 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:52:14,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:52:14,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:52:14,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:52:14,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:52:14,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:52:14,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:52:14,134 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:52:14,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:52:14,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:52:14,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:52:14,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:52:14,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:52:14,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:52:14,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:52:14,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:52:14,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:52:14,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:52:14,137 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:52:14,137 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:52:14,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:52:14,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:52:14,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:52:14,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:52:14,491 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:52:14,491 INFO L432 ainManager$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+lhb-reducer.c [2021-05-06 05:52:14,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918d7cd3f/b8c7d2be5b4b4b73940aa2964eeead9c/FLAG39a7ba6ad [2021-05-06 05:52:14,903 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:52:14,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+lhb-reducer.c [2021-05-06 05:52:14,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918d7cd3f/b8c7d2be5b4b4b73940aa2964eeead9c/FLAG39a7ba6ad [2021-05-06 05:52:15,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918d7cd3f/b8c7d2be5b4b4b73940aa2964eeead9c [2021-05-06 05:52:15,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:52:15,290 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:52:15,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:52:15,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:52:15,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:52:15,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a76bb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15, skipping insertion in model container [2021-05-06 05:52:15,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:52:15,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:52:15,445 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+lhb-reducer.c[1126,1139] [2021-05-06 05:52:15,453 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+lhb-reducer.c[1880,1893] [2021-05-06 05:52:15,457 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+lhb-reducer.c[2401,2414] [2021-05-06 05:52:15,462 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+lhb-reducer.c[3193,3206] [2021-05-06 05:52:15,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:52:15,479 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:52:15,508 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+lhb-reducer.c[1126,1139] [2021-05-06 05:52:15,517 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+lhb-reducer.c[1880,1893] [2021-05-06 05:52:15,519 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+lhb-reducer.c[2401,2414] [2021-05-06 05:52:15,522 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+lhb-reducer.c[3193,3206] [2021-05-06 05:52:15,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:52:15,548 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:52:15,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15 WrapperNode [2021-05-06 05:52:15,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:52:15,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:52:15,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:52:15,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:52:15,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (1/1) ... [2021-05-06 05:52:15,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:52:15,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:52:15,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:52:15,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:52:15,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:52:15,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:52:15,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:52:15,707 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:52:15,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:52:15,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:52:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:52:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:52:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:52:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-06 05:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:52:16,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:52:16,088 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-06 05:52:16,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:16 BoogieIcfgContainer [2021-05-06 05:52:16,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:52:16,090 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:52:16,090 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:52:16,091 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:52:16,093 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:16" (1/1) ... [2021-05-06 05:52:16,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:52:16 BasicIcfg [2021-05-06 05:52:16,116 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:52:16,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:52:16,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:52:16,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:52:16,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:52:15" (1/4) ... [2021-05-06 05:52:16,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfcdaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:52:16, skipping insertion in model container [2021-05-06 05:52:16,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:15" (2/4) ... [2021-05-06 05:52:16,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfcdaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:52:16, skipping insertion in model container [2021-05-06 05:52:16,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:16" (3/4) ... [2021-05-06 05:52:16,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfcdaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:52:16, skipping insertion in model container [2021-05-06 05:52:16,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:52:16" (4/4) ... [2021-05-06 05:52:16,124 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+lhb-reducer.cJordan [2021-05-06 05:52:16,130 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:52:16,135 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2021-05-06 05:52:16,149 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-06 05:52:16,174 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:52:16,174 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:52:16,175 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:52:16,175 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:52:16,175 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:52:16,175 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:52:16,175 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:52:16,175 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:52:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 37 states have internal predecessors, (54), 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) [2021-05-06 05:52:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 05:52:16,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:16,205 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:16,206 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1355152370, now seen corresponding path program 1 times [2021-05-06 05:52:16,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:16,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872448817] [2021-05-06 05:52:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:16,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:16,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:16,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872448817] [2021-05-06 05:52:16,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872448817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:16,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:16,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:52:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841130852] [2021-05-06 05:52:16,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 05:52:16,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:16,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 05:52:16,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:52:16,575 INFO L87 Difference]: Start difference. First operand has 42 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 37 states have internal predecessors, (54), 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) [2021-05-06 05:52:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:16,725 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-05-06 05:52:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 05:52:16,727 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 [2021-05-06 05:52:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:16,731 INFO L225 Difference]: With dead ends: 42 [2021-05-06 05:52:16,732 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 05:52:16,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:52:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 05:52:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 05:52:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 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) [2021-05-06 05:52:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-06 05:52:16,760 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 13 [2021-05-06 05:52:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:16,760 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-06 05:52:16,760 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) [2021-05-06 05:52:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-06 05:52:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 05:52:16,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:16,761 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:16,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:52:16,761 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:16,762 INFO L82 PathProgramCache]: Analyzing trace with hash -970515929, now seen corresponding path program 1 times [2021-05-06 05:52:16,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:16,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907891410] [2021-05-06 05:52:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:16,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:16,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:16,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907891410] [2021-05-06 05:52:16,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907891410] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:16,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:16,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:52:16,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39075444] [2021-05-06 05:52:16,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:52:16,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:52:16,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:52:16,866 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2021-05-06 05:52:17,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:17,015 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-06 05:52:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:52:17,016 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 [2021-05-06 05:52:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:17,019 INFO L225 Difference]: With dead ends: 51 [2021-05-06 05:52:17,019 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 05:52:17,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:52:17,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 05:52:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-05-06 05:52:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 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) [2021-05-06 05:52:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-06 05:52:17,030 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2021-05-06 05:52:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:17,031 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-06 05:52:17,031 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) [2021-05-06 05:52:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-06 05:52:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 05:52:17,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:17,035 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:17,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:52:17,037 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash -969532826, now seen corresponding path program 1 times [2021-05-06 05:52:17,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:17,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860459200] [2021-05-06 05:52:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:17,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:17,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:17,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860459200] [2021-05-06 05:52:17,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860459200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:17,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:17,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:52:17,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056224733] [2021-05-06 05:52:17,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 05:52:17,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 05:52:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:52:17,185 INFO L87 Difference]: Start difference. First operand 34 states and 39 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) [2021-05-06 05:52:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:17,310 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-06 05:52:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 05:52:17,310 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 [2021-05-06 05:52:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:17,312 INFO L225 Difference]: With dead ends: 41 [2021-05-06 05:52:17,312 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 05:52:17,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:52:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 05:52:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 05:52:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 30 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) [2021-05-06 05:52:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-06 05:52:17,318 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2021-05-06 05:52:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:17,319 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-06 05:52:17,319 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) [2021-05-06 05:52:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-06 05:52:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 05:52:17,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:17,320 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:17,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:52:17,320 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash -20391467, now seen corresponding path program 1 times [2021-05-06 05:52:17,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:17,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439023768] [2021-05-06 05:52:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:17,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:17,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:17,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439023768] [2021-05-06 05:52:17,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439023768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:17,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:17,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:52:17,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133670478] [2021-05-06 05:52:17,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 05:52:17,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:17,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 05:52:17,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:52:17,445 INFO L87 Difference]: Start difference. First operand 34 states and 38 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) [2021-05-06 05:52:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:17,526 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-05-06 05:52:17,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 05:52:17,526 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 [2021-05-06 05:52:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:17,529 INFO L225 Difference]: With dead ends: 35 [2021-05-06 05:52:17,529 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 05:52:17,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:52:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 05:52:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-05-06 05:52:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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) [2021-05-06 05:52:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-05-06 05:52:17,537 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 15 [2021-05-06 05:52:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:17,538 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-05-06 05:52:17,538 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) [2021-05-06 05:52:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-05-06 05:52:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 05:52:17,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:17,538 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] [2021-05-06 05:52:17,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 05:52:17,541 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1588200378, now seen corresponding path program 1 times [2021-05-06 05:52:17,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:17,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814673210] [2021-05-06 05:52:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:18,495 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 88 [2021-05-06 05:52:18,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:18,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814673210] [2021-05-06 05:52:18,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814673210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:18,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:18,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 05:52:18,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519576195] [2021-05-06 05:52:18,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:52:18,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:52:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:52:18,672 INFO L87 Difference]: Start difference. First operand 29 states and 32 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) [2021-05-06 05:52:18,883 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2021-05-06 05:52:19,043 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 46 [2021-05-06 05:52:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:19,085 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-05-06 05:52:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:52:19,086 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 [2021-05-06 05:52:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:19,088 INFO L225 Difference]: With dead ends: 31 [2021-05-06 05:52:19,088 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 05:52:19,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 900.9ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:52:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 05:52:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 05:52:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 26 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) [2021-05-06 05:52:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-06 05:52:19,094 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 20 [2021-05-06 05:52:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:19,094 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-06 05:52:19,095 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) [2021-05-06 05:52:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-06 05:52:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 05:52:19,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:19,101 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] [2021-05-06 05:52:19,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 05:52:19,101 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2019586852, now seen corresponding path program 1 times [2021-05-06 05:52:19,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:19,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971485722] [2021-05-06 05:52:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:19,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:19,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:19,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971485722] [2021-05-06 05:52:19,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971485722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:19,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:19,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:52:19,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831238995] [2021-05-06 05:52:19,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:52:19,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:19,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:52:19,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:52:19,204 INFO L87 Difference]: Start difference. First operand 30 states and 31 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) [2021-05-06 05:52:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:19,355 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 05:52:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:52:19,355 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 [2021-05-06 05:52:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:19,356 INFO L225 Difference]: With dead ends: 42 [2021-05-06 05:52:19,356 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 05:52:19,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:52:19,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 05:52:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-05-06 05:52:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-05-06 05:52:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-05-06 05:52:19,363 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-05-06 05:52:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:19,363 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-05-06 05:52:19,364 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) [2021-05-06 05:52:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-05-06 05:52:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 05:52:19,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:19,364 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, 1] [2021-05-06 05:52:19,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 05:52:19,365 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:19,365 INFO L82 PathProgramCache]: Analyzing trace with hash -717039962, now seen corresponding path program 1 times [2021-05-06 05:52:19,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:19,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571643958] [2021-05-06 05:52:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:19,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:19,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571643958] [2021-05-06 05:52:19,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571643958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:52:19,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874552549] [2021-05-06 05:52:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:52:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 05:52:19,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:52:19,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:19,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874552549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:52:19,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:52:19,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-05-06 05:52:19,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28671790] [2021-05-06 05:52:19,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:52:19,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:52:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:52:19,881 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 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) [2021-05-06 05:52:20,148 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-06 05:52:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:20,401 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-06 05:52:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:52:20,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 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 23 [2021-05-06 05:52:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:20,402 INFO L225 Difference]: With dead ends: 27 [2021-05-06 05:52:20,402 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:52:20,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:52:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:52:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:52:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:52:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:52:20,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-05-06 05:52:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:20,403 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:52:20,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 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) [2021-05-06 05:52:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:52:20,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:52:20,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 05:52:20,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:52:20 BasicIcfg [2021-05-06 05:52:20,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:52:20,611 INFO L168 Benchmark]: Toolchain (without parser) took 5320.98 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 141.7 MB in the beginning and 115.8 MB in the end (delta: 25.9 MB). Peak memory consumption was 62.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:20,611 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 176.2 MB. Free memory was 158.3 MB in the beginning and 158.2 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:52:20,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.93 ms. Allocated memory is still 176.2 MB. Free memory was 141.6 MB in the beginning and 130.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:20,612 INFO L168 Benchmark]: Boogie Preprocessor took 94.85 ms. Allocated memory is still 176.2 MB. Free memory was 130.1 MB in the beginning and 159.1 MB in the end (delta: -29.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:20,612 INFO L168 Benchmark]: RCFGBuilder took 443.56 ms. Allocated memory is still 176.2 MB. Free memory was 159.1 MB in the beginning and 137.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:20,612 INFO L168 Benchmark]: IcfgTransformer took 26.03 ms. Allocated memory is still 176.2 MB. Free memory was 137.1 MB in the beginning and 135.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:20,612 INFO L168 Benchmark]: TraceAbstraction took 4493.28 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 135.0 MB in the beginning and 115.8 MB in the end (delta: 19.2 MB). Peak memory consumption was 55.9 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:20,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 176.2 MB. Free memory was 158.3 MB in the beginning and 158.2 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.93 ms. Allocated memory is still 176.2 MB. Free memory was 141.6 MB in the beginning and 130.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 94.85 ms. Allocated memory is still 176.2 MB. Free memory was 130.1 MB in the beginning and 159.1 MB in the end (delta: -29.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 443.56 ms. Allocated memory is still 176.2 MB. Free memory was 159.1 MB in the beginning and 137.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * IcfgTransformer took 26.03 ms. Allocated memory is still 176.2 MB. Free memory was 137.1 MB in the beginning and 135.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4493.28 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 135.0 MB in the beginning and 115.8 MB in the end (delta: 19.2 MB). Peak memory consumption was 55.9 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: 109]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 167]: 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, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4434.7ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 28.5ms, AutomataDifference: 1627.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 196 SDtfs, 188 SDslu, 266 SDs, 0 SdLazy, 396 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 813.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1607.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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: 49.4ms AutomataMinimizationTime, 7 MinimizatonAttempts, 47 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 52.0ms SsaConstructionTime, 296.3ms SatisfiabilityAnalysisTime, 1956.2ms InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 3385 SizeOfPredicates, 2 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 10 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...