/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 0.2.2-dev-b030c9e [2022-03-20 04:27:45,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:27:45,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:27:45,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 04:27:45,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:27:45,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:27:45,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:27:45,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:27:45,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:27:45,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:27:45,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:27:45,667 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:27:45,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:27:45,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:27:45,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:27:45,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:27:45,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:27:45,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:27:45,668 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:27:45,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:27:45,668 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:27:45,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:27:45,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:27:45,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:27:45,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:27:45,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:27:45,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:27:45,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:27:45,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:27:45,670 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:27:45,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:27:45,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:27:45,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:27:45,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:27:45,897 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:27:45,897 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:27:45,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_1.c [2022-03-20 04:27:45,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8782365d/7d4f76fd55f74fa38dad41eaa0a939dd/FLAGf43d77240 [2022-03-20 04:27:46,260 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:27:46,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_1.c [2022-03-20 04:27:46,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8782365d/7d4f76fd55f74fa38dad41eaa0a939dd/FLAGf43d77240 [2022-03-20 04:27:46,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8782365d/7d4f76fd55f74fa38dad41eaa0a939dd [2022-03-20 04:27:46,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:27:46,694 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:27:46,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:27:46,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:27:46,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:27:46,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d2dd970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46, skipping insertion in model container [2022-03-20 04:27:46,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:27:46,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:27:46,864 WARN L230 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] [2022-03-20 04:27:46,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:27:46,874 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:27:46,883 WARN L230 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] [2022-03-20 04:27:46,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:27:46,892 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:27:46,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46 WrapperNode [2022-03-20 04:27:46,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:27:46,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:27:46,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:27:46,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:27:46,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:27:46,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:27:46,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:27:46,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:27:46,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (1/1) ... [2022-03-20 04:27:46,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:27:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:46,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 04:27:47,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 04:27:47,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:27:47,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:27:47,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:27:47,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:27:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:27:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:27:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:27:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:27:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:27:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:27:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:27:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:27:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:27:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:27:47,087 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:27:47,089 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:27:47,185 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:27:47,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:27:47,190 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 04:27:47,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:27:47 BoogieIcfgContainer [2022-03-20 04:27:47,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:27:47,192 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:27:47,192 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:27:47,193 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:27:47,196 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:27:47" (1/1) ... [2022-03-20 04:27:47,197 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:27:47,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:27:47 BasicIcfg [2022-03-20 04:27:47,209 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:27:47,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:27:47,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:27:47,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:27:47,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:27:46" (1/4) ... [2022-03-20 04:27:47,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6928116f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:27:47, skipping insertion in model container [2022-03-20 04:27:47,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:46" (2/4) ... [2022-03-20 04:27:47,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6928116f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:27:47, skipping insertion in model container [2022-03-20 04:27:47,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:27:47" (3/4) ... [2022-03-20 04:27:47,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6928116f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:27:47, skipping insertion in model container [2022-03-20 04:27:47,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:27:47" (4/4) ... [2022-03-20 04:27:47,218 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1.cJordan [2022-03-20 04:27:47,222 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:27:47,222 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:27:47,261 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:27:47,267 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 04:27:47,267 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:27:47,277 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) [2022-03-20 04:27:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-20 04:27:47,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:47,290 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:47,290 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash -633459621, now seen corresponding path program 1 times [2022-03-20 04:27:47,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:47,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367926601] [2022-03-20 04:27:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:47,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:47,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:27:47,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:47,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367926601] [2022-03-20 04:27:47,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367926601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:47,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:27:47,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 04:27:47,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183654627] [2022-03-20 04:27:47,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:47,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 04:27:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 04:27:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:27:47,486 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) [2022-03-20 04:27:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:47,502 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-03-20 04:27:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 04:27:47,510 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 [2022-03-20 04:27:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:47,514 INFO L225 Difference]: With dead ends: 16 [2022-03-20 04:27:47,514 INFO L226 Difference]: Without dead ends: 11 [2022-03-20 04:27:47,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:27:47,518 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:27:47,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:27:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-03-20 04:27:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-03-20 04:27:47,537 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) [2022-03-20 04:27:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-03-20 04:27:47,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2022-03-20 04:27:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:47,539 INFO L478 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-03-20 04:27:47,539 INFO L479 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) [2022-03-20 04:27:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-03-20 04:27:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-20 04:27:47,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:47,540 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:47,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:27:47,541 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -633458660, now seen corresponding path program 1 times [2022-03-20 04:27:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884680877] [2022-03-20 04:27:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:47,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:47,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:27:47,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:47,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884680877] [2022-03-20 04:27:47,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884680877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:47,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:27:47,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 04:27:47,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77563846] [2022-03-20 04:27:47,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:47,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:27:47,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:47,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:27:47,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 04:27:47,607 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) [2022-03-20 04:27:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:47,625 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2022-03-20 04:27:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:27:47,626 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 [2022-03-20 04:27:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:47,626 INFO L225 Difference]: With dead ends: 13 [2022-03-20 04:27:47,626 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 04:27:47,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:27:47,628 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:27:47,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:27:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 04:27:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-03-20 04:27:47,630 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) [2022-03-20 04:27:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-03-20 04:27:47,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2022-03-20 04:27:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:47,631 INFO L478 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-03-20 04:27:47,631 INFO L479 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) [2022-03-20 04:27:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-03-20 04:27:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 04:27:47,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:47,632 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:47,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 04:27:47,632 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1132563481, now seen corresponding path program 1 times [2022-03-20 04:27:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:47,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175050909] [2022-03-20 04:27:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:47,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:27:47,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:47,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175050909] [2022-03-20 04:27:47,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175050909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:27:47,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883231062] [2022-03-20 04:27:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:47,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:47,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:27:47,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:27:47,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 04:27:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 04:27:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:27:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:27:47,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:27:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:27:47,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883231062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:27:47,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:27:47,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 04:27:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141436580] [2022-03-20 04:27:47,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:27:47,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:27:47,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:47,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:27:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:27:47,826 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-03-20 04:27:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:47,885 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-03-20 04:27:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:27:47,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 [2022-03-20 04:27:47,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:47,885 INFO L225 Difference]: With dead ends: 18 [2022-03-20 04:27:47,885 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 04:27:47,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:27:47,887 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:27:47,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:27:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 04:27:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 04:27:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-03-20 04:27:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-20 04:27:47,891 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-03-20 04:27:47,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:47,891 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-20 04:27:47,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-03-20 04:27:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-20 04:27:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 04:27:47,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:27:47,892 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:27:47,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 04:27:48,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:27:48,110 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:27:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:27:48,111 INFO L85 PathProgramCache]: Analyzing trace with hash -754672496, now seen corresponding path program 2 times [2022-03-20 04:27:48,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:27:48,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036044171] [2022-03-20 04:27:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:27:48,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:27:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:48,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:27:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:27:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 04:27:48,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:27:48,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036044171] [2022-03-20 04:27:48,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036044171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:27:48,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:27:48,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 04:27:48,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799717094] [2022-03-20 04:27:48,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:27:48,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 04:27:48,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:27:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 04:27:48,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:27:48,185 INFO L87 Difference]: Start difference. First operand 18 states and 18 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) [2022-03-20 04:27:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:27:48,222 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-03-20 04:27:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 04:27:48,222 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 17 [2022-03-20 04:27:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:27:48,224 INFO L225 Difference]: With dead ends: 16 [2022-03-20 04:27:48,224 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 04:27:48,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 04:27:48,231 INFO L913 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:27:48,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:27:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 04:27:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 04:27:48,232 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) [2022-03-20 04:27:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 04:27:48,233 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-03-20 04:27:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:27:48,233 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 04:27:48,233 INFO L479 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) [2022-03-20 04:27:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 04:27:48,233 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 04:27:48,235 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 04:27:48,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 04:27:48,237 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-03-20 04:27:48,251 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 04:27:48,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:27:48 BasicIcfg [2022-03-20 04:27:48,254 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 04:27:48,254 INFO L158 Benchmark]: Toolchain (without parser) took 1560.46ms. Allocated memory was 165.7MB in the beginning and 290.5MB in the end (delta: 124.8MB). Free memory was 111.5MB in the beginning and 199.9MB in the end (delta: -88.4MB). Peak memory consumption was 37.1MB. Max. memory is 8.0GB. [2022-03-20 04:27:48,254 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 165.7MB. Free memory is still 127.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 04:27:48,255 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.31ms. Allocated memory was 165.7MB in the beginning and 290.5MB in the end (delta: 124.8MB). Free memory was 111.4MB in the beginning and 262.8MB in the end (delta: -151.4MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-03-20 04:27:48,255 INFO L158 Benchmark]: Boogie Preprocessor took 26.00ms. Allocated memory is still 290.5MB. Free memory was 262.8MB in the beginning and 261.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 04:27:48,255 INFO L158 Benchmark]: RCFGBuilder took 270.64ms. Allocated memory is still 290.5MB. Free memory was 261.2MB in the beginning and 251.3MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 04:27:48,255 INFO L158 Benchmark]: IcfgTransformer took 17.59ms. Allocated memory is still 290.5MB. Free memory was 251.3MB in the beginning and 250.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 04:27:48,256 INFO L158 Benchmark]: TraceAbstraction took 1042.64ms. Allocated memory is still 290.5MB. Free memory was 249.7MB in the beginning and 199.9MB in the end (delta: 49.8MB). Peak memory consumption was 49.3MB. Max. memory is 8.0GB. [2022-03-20 04:27:48,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 165.7MB. Free memory is still 127.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.31ms. Allocated memory was 165.7MB in the beginning and 290.5MB in the end (delta: 124.8MB). Free memory was 111.4MB in the beginning and 262.8MB in the end (delta: -151.4MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.00ms. Allocated memory is still 290.5MB. Free memory was 262.8MB in the beginning and 261.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 270.64ms. Allocated memory is still 290.5MB. Free memory was 261.2MB in the beginning and 251.3MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 17.59ms. Allocated memory is still 290.5MB. Free memory was 251.3MB in the beginning and 250.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1042.64ms. Allocated memory is still 290.5MB. Free memory was 249.7MB in the beginning and 199.9MB in the end (delta: 49.8MB). Peak memory consumption was 49.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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. OverallTime: 1.0s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 79 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 39 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38 IncrementalHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 40 mSDtfsCounter, 38 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=3, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 62 ConstructedInterpolants, 0 QuantifiedInterpolants, 116 SizeOfPredicates, 0 NumberOfNonLiveVariables, 47 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 16/19 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! [2022-03-20 04:27:48,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...