/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-simple/nested_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:05:53,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:05:53,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:05:53,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:05:53,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:05:53,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:05:53,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:05:53,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:05:54,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:05:54,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:05:54,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:05:54,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:05:54,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:05:54,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:05:54,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:05:54,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:05:54,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:05:54,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:05:54,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:05:54,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:05:54,023 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:05:54,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:05:54,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:05:54,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:05:54,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:05:54,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:05:54,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:05:54,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:05:54,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:05:54,025 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:05:54,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:05:54,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:05:54,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:05:54,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:05:54,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:05:54,269 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:05:54,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_1.c [2021-05-02 19:05:54,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69d9db9a7/32c0f2b03e154e9d90d9d836379c3673/FLAG788a4dbdf [2021-05-02 19:05:54,698 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:05:54,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_1.c [2021-05-02 19:05:54,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69d9db9a7/32c0f2b03e154e9d90d9d836379c3673/FLAG788a4dbdf [2021-05-02 19:05:55,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69d9db9a7/32c0f2b03e154e9d90d9d836379c3673 [2021-05-02 19:05:55,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:05:55,113 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:05:55,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:05:55,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:05:55,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:05:55,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcbced3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55, skipping insertion in model container [2021-05-02 19:05:55,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:05:55,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:05:55,255 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-simple/nested_1.c[676,689] [2021-05-02 19:05:55,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:05:55,266 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:05:55,306 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-simple/nested_1.c[676,689] [2021-05-02 19:05:55,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:05:55,316 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:05:55,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55 WrapperNode [2021-05-02 19:05:55,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:05:55,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:05:55,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:05:55,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:05:55,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:05:55,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:05:55,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:05:55,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:05:55,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (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 19:05:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:05:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:05:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:05:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:05:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:05:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:05:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:05:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:05:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:05:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:05:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:05:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:05:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:05:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:05:55,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:05:55,629 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:05:55,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:05:55 BoogieIcfgContainer [2021-05-02 19:05:55,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:05:55,630 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:05:55,631 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:05:55,631 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:05:55,633 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:05:55" (1/1) ... [2021-05-02 19:05:55,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:05:55 BasicIcfg [2021-05-02 19:05:55,660 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:05:55,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:05:55,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:05:55,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:05:55,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:05:55" (1/4) ... [2021-05-02 19:05:55,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e156de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:05:55, skipping insertion in model container [2021-05-02 19:05:55,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:55" (2/4) ... [2021-05-02 19:05:55,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e156de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:05:55, skipping insertion in model container [2021-05-02 19:05:55,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:05:55" (3/4) ... [2021-05-02 19:05:55,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e156de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:05:55, skipping insertion in model container [2021-05-02 19:05:55,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:05:55" (4/4) ... [2021-05-02 19:05:55,665 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1.cJordan [2021-05-02 19:05:55,668 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:05:55,671 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:05:55,687 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:05:55,714 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:05:55,714 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:05:55,714 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:05:55,714 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:05:55,714 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:05:55,714 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:05:55,715 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:05:55,715 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:05:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 19:05:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 19:05:55,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:05:55,732 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:05:55,732 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:05:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:05:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash -633459621, now seen corresponding path program 1 times [2021-05-02 19:05:55,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:05:55,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141211302] [2021-05-02 19:05:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:05:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:55,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:05:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:55,927 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 19:05:55,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:05:55,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141211302] [2021-05-02 19:05:55,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141211302] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:05:55,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:05:55,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:05:55,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865796790] [2021-05-02 19:05:55,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:05:55,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:05:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:05:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:05:55,941 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 19:05:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:05:55,963 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-02 19:05:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:05:55,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 9 [2021-05-02 19:05:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:05:55,969 INFO L225 Difference]: With dead ends: 16 [2021-05-02 19:05:55,969 INFO L226 Difference]: Without dead ends: 11 [2021-05-02 19:05:55,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:05:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-05-02 19:05:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-05-02 19:05:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 19:05:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-05-02 19:05:55,988 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-05-02 19:05:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:05:55,989 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-05-02 19:05:55,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 19:05:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-05-02 19:05:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 19:05:55,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:05:55,989 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:05:55,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:05:55,990 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:05:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:05:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash -633458660, now seen corresponding path program 1 times [2021-05-02 19:05:55,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:05:55,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200789956] [2021-05-02 19:05:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:05:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:56,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:05:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:56,058 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 19:05:56,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:05:56,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200789956] [2021-05-02 19:05:56,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200789956] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:05:56,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:05:56,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:05:56,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736356676] [2021-05-02 19:05:56,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:05:56,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:05:56,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:05:56,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:05:56,060 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 19:05:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:05:56,094 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-05-02 19:05:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:05:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 9 [2021-05-02 19:05:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:05:56,095 INFO L225 Difference]: With dead ends: 13 [2021-05-02 19:05:56,095 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 19:05:56,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:05:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 19:05:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-05-02 19:05:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 19:05:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 19:05:56,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-05-02 19:05:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:05:56,098 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 19:05:56,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 19:05:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 19:05:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:05:56,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:05:56,099 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:05:56,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:05:56,099 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:05:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:05:56,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1132563481, now seen corresponding path program 1 times [2021-05-02 19:05:56,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:05:56,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340124393] [2021-05-02 19:05:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:05:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:56,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:05:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:05:56,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:05:56,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340124393] [2021-05-02 19:05:56,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340124393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:05:56,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499314267] [2021-05-02 19:05:56,146 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 19:05:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 19:05:56,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:05:56,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:05:56,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:05:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:05:56,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499314267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:05:56,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:05:56,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 19:05:56,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621632011] [2021-05-02 19:05:56,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:05:56,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:05:56,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:05:56,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:05:56,239 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 19:05:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:05:56,292 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-05-02 19:05:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:05:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 11 [2021-05-02 19:05:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:05:56,293 INFO L225 Difference]: With dead ends: 15 [2021-05-02 19:05:56,293 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 19:05:56,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:05:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 19:05:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-02 19:05:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 19:05:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 19:05:56,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-02 19:05:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:05:56,296 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 19:05:56,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 19:05:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 19:05:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 19:05:56,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:05:56,296 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:05:56,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 19:05:56,513 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:05:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:05:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1767759062, now seen corresponding path program 2 times [2021-05-02 19:05:56,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:05:56,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505705517] [2021-05-02 19:05:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:05:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:56,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:05:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:05:56,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:05:56,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505705517] [2021-05-02 19:05:56,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505705517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:05:56,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:05:56,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:05:56,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865344741] [2021-05-02 19:05:56,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:05:56,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:05:56,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:05:56,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:05:56,625 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 19:05:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:05:56,690 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-05-02 19:05:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:05:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 19:05:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:05:56,690 INFO L225 Difference]: With dead ends: 12 [2021-05-02 19:05:56,690 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:05:56,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:05:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:05:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:05:56,691 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 19:05:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:05:56,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-05-02 19:05:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:05:56,691 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:05:56,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 19:05:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:05:56,691 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:05:56,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 19:05:56,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:05:56 BasicIcfg [2021-05-02 19:05:56,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:05:56,696 INFO L168 Benchmark]: Toolchain (without parser) took 1582.73 ms. Allocated memory was 188.7 MB in the beginning and 229.6 MB in the end (delta: 40.9 MB). Free memory was 152.9 MB in the beginning and 138.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 54.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:56,696 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 188.7 MB. Free memory was 169.5 MB in the beginning and 169.4 MB in the end (delta: 79.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:05:56,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.18 ms. Allocated memory is still 188.7 MB. Free memory was 152.7 MB in the beginning and 171.4 MB in the end (delta: -18.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:56,696 INFO L168 Benchmark]: Boogie Preprocessor took 21.45 ms. Allocated memory is still 188.7 MB. Free memory was 171.4 MB in the beginning and 169.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:56,697 INFO L168 Benchmark]: RCFGBuilder took 291.04 ms. Allocated memory is still 188.7 MB. Free memory was 169.9 MB in the beginning and 158.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:56,697 INFO L168 Benchmark]: IcfgTransformer took 29.39 ms. Allocated memory is still 188.7 MB. Free memory was 158.1 MB in the beginning and 156.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:56,697 INFO L168 Benchmark]: TraceAbstraction took 1034.17 ms. Allocated memory was 188.7 MB in the beginning and 229.6 MB in the end (delta: 40.9 MB). Free memory was 156.4 MB in the beginning and 138.2 MB in the end (delta: 18.2 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:56,699 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 188.7 MB. Free memory was 169.5 MB in the beginning and 169.4 MB in the end (delta: 79.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 187.18 ms. Allocated memory is still 188.7 MB. Free memory was 152.7 MB in the beginning and 171.4 MB in the end (delta: -18.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.45 ms. Allocated memory is still 188.7 MB. Free memory was 171.4 MB in the beginning and 169.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.04 ms. Allocated memory is still 188.7 MB. Free memory was 169.9 MB in the beginning and 158.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.39 ms. Allocated memory is still 188.7 MB. Free memory was 158.1 MB in the beginning and 156.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1034.17 ms. Allocated memory was 188.7 MB in the beginning and 229.6 MB in the end (delta: 40.9 MB). Free memory was 156.4 MB in the beginning and 138.2 MB in the end (delta: 18.2 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: 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, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 979.7ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 12.2ms, AutomataDifference: 195.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 36 SDtfs, 34 SDslu, 29 SDs, 0 SdLazy, 41 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 217.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.8ms SsaConstructionTime, 59.7ms SatisfiabilityAnalysisTime, 346.0ms InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...