/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:15:52,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:15:52,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:15:52,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:15:52,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:15:52,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:15:52,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:15:52,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:15:52,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:15:52,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:15:52,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:15:52,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:15:52,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:15:52,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:15:52,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:15:52,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:15:52,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:15:52,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:15:52,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:15:52,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:15:52,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:15:52,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:15:52,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:15:52,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:15:52,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:15:52,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:15:52,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:15:52,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:15:52,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:15:52,210 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:15:52,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:15:52,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:15:52,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:15:52,216 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:15:52,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:15:52,216 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:15:52,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:15:52,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:15:52,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:15:52,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:15:52,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:15:52,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:15:52,219 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:15:52,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:15:52,219 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:15:52,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:15:52,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:15:52,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:15:52,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:15:52,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:15:52,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:15:52,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:15:52,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:15:52,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:15:52,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:15:52,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:15:52,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:15:52,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:15:52,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:15:52,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:15:52,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:15:52,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:15:52,735 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:15:52,735 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:15:52,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-23 18:15:52,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e812d3d3/06e392851c92446aaf5b48bba10523b6/FLAG29b3b26c7 [2020-10-23 18:15:53,563 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:15:53,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-23 18:15:53,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e812d3d3/06e392851c92446aaf5b48bba10523b6/FLAG29b3b26c7 [2020-10-23 18:15:53,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e812d3d3/06e392851c92446aaf5b48bba10523b6 [2020-10-23 18:15:53,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:15:53,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:15:53,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:15:53,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:15:53,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:15:53,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:15:53" (1/1) ... [2020-10-23 18:15:53,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161b900c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:53, skipping insertion in model container [2020-10-23 18:15:53,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:15:53" (1/1) ... [2020-10-23 18:15:53,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:15:53,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:15:54,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:15:54,152 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:15:54,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:15:54,189 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:15:54,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54 WrapperNode [2020-10-23 18:15:54,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:15:54,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:15:54,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:15:54,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:15:54,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (1/1) ... [2020-10-23 18:15:54,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (1/1) ... [2020-10-23 18:15:54,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (1/1) ... [2020-10-23 18:15:54,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (1/1) ... [2020-10-23 18:15:54,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (1/1) ... [2020-10-23 18:15:54,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (1/1) ... [2020-10-23 18:15:54,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (1/1) ... [2020-10-23 18:15:54,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:15:54,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:15:54,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:15:54,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:15:54,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (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 [2020-10-23 18:15:54,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:15:54,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:15:54,326 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:15:54,327 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:15:54,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:15:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 18:15:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:15:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:15:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:15:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:15:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:15:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:15:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:15:54,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:15:54,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:15:54,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:15:54,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:15:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:15:54,808 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:15:54,808 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:15:54,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:15:54 BoogieIcfgContainer [2020-10-23 18:15:54,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:15:54,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:15:54,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:15:54,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:15:54,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:15:53" (1/3) ... [2020-10-23 18:15:54,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2590bda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:15:54, skipping insertion in model container [2020-10-23 18:15:54,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:54" (2/3) ... [2020-10-23 18:15:54,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2590bda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:15:54, skipping insertion in model container [2020-10-23 18:15:54,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:15:54" (3/3) ... [2020-10-23 18:15:54,838 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-10-23 18:15:54,873 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:15:54,888 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:15:54,930 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:15:55,039 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:15:55,040 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:15:55,040 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:15:55,040 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:15:55,040 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:15:55,040 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:15:55,040 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:15:55,041 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:15:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-23 18:15:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:15:55,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:55,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:55,088 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1397195593, now seen corresponding path program 1 times [2020-10-23 18:15:55,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:55,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861425636] [2020-10-23 18:15:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:55,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:55,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:15:55,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861425636] [2020-10-23 18:15:55,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:55,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:15:55,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179817620] [2020-10-23 18:15:55,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:15:55,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:15:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:15:55,721 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-23 18:15:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:56,016 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-23 18:15:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:15:56,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:15:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:56,029 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:15:56,029 INFO L226 Difference]: Without dead ends: 21 [2020-10-23 18:15:56,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-23 18:15:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-23 18:15:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 18:15:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-23 18:15:56,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-23 18:15:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:56,089 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-23 18:15:56,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:15:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-23 18:15:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:15:56,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:56,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:56,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:15:56,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:56,094 INFO L82 PathProgramCache]: Analyzing trace with hash -630540429, now seen corresponding path program 1 times [2020-10-23 18:15:56,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:56,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399224364] [2020-10-23 18:15:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:56,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399224364] [2020-10-23 18:15:56,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:56,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:15:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758379201] [2020-10-23 18:15:56,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:15:56,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:56,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:15:56,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:15:56,335 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-23 18:15:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:56,607 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-23 18:15:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:15:56,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-23 18:15:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:56,609 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:15:56,610 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:15:56,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:15:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-23 18:15:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:15:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-23 18:15:56,621 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2020-10-23 18:15:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:56,622 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-23 18:15:56,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:15:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-23 18:15:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:15:56,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:56,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:56,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:15:56,624 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash 256963252, now seen corresponding path program 1 times [2020-10-23 18:15:56,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:56,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801913551] [2020-10-23 18:15:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:56,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801913551] [2020-10-23 18:15:56,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237317709] [2020-10-23 18:15:56,865 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 [2020-10-23 18:15:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 18:15:56,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:57,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:57,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-23 18:15:57,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841865709] [2020-10-23 18:15:57,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:15:57,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:57,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:15:57,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:15:57,061 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-10-23 18:15:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:57,490 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-23 18:15:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:15:57,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-23 18:15:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:57,493 INFO L225 Difference]: With dead ends: 30 [2020-10-23 18:15:57,493 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:15:57,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:15:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:15:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-23 18:15:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:15:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-23 18:15:57,503 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-23 18:15:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:57,504 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-23 18:15:57,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:15:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-23 18:15:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:15:57,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:57,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:57,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:15:57,721 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2059612612, now seen corresponding path program 1 times [2020-10-23 18:15:57,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:57,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269481755] [2020-10-23 18:15:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:15:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269481755] [2020-10-23 18:15:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319420146] [2020-10-23 18:15:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:58,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:15:58,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 18:15:58,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:15:58,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2020-10-23 18:15:58,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572835609] [2020-10-23 18:15:58,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:15:58,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:15:58,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:15:58,090 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-10-23 18:15:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:58,105 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-23 18:15:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:15:58,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-23 18:15:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:58,108 INFO L225 Difference]: With dead ends: 32 [2020-10-23 18:15:58,108 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:15:58,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:15:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:15:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-23 18:15:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:15:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-23 18:15:58,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 29 [2020-10-23 18:15:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:58,117 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-23 18:15:58,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:15:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-23 18:15:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:15:58,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:58,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:58,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:58,333 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:58,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1347851003, now seen corresponding path program 2 times [2020-10-23 18:15:58,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:58,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927965224] [2020-10-23 18:15:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:58,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:58,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:58,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:58,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:15:58,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927965224] [2020-10-23 18:15:58,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47770166] [2020-10-23 18:15:58,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:58,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:15:58,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 18:15:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:15:58,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:58,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:15:58,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854239969] [2020-10-23 18:15:58,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:15:58,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:58,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:15:58,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:15:58,740 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2020-10-23 18:15:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:59,449 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-23 18:15:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:15:59,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-23 18:15:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:59,453 INFO L225 Difference]: With dead ends: 44 [2020-10-23 18:15:59,453 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 18:15:59,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:15:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 18:15:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-23 18:15:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:15:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-23 18:15:59,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2020-10-23 18:15:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:59,474 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-23 18:15:59,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:15:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-23 18:15:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 18:15:59,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:59,476 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:59,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:59,690 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1202225072, now seen corresponding path program 3 times [2020-10-23 18:15:59,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:59,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410168430] [2020-10-23 18:15:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:59,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:59,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:59,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:59,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:00,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410168430] [2020-10-23 18:16:00,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219224128] [2020-10-23 18:16:00,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:00,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 18:16:00,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:00,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 18:16:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-23 18:16:00,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:16:00,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2020-10-23 18:16:00,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104376752] [2020-10-23 18:16:00,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:16:00,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:00,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:16:00,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:00,196 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-10-23 18:16:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:00,207 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-23 18:16:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:16:00,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-23 18:16:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:00,208 INFO L225 Difference]: With dead ends: 29 [2020-10-23 18:16:00,209 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:16:00,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:16:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:16:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:16:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:16:00,210 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-10-23 18:16:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:00,211 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:16:00,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:16:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:16:00,211 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:16:00,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:00,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:16:00,539 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:16:00,540 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:16:00,540 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:16:00,540 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:16:00,540 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:16:00,540 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:16:00,541 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:16:00,541 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:16:00,541 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:16:00,541 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:16:00,541 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:16:00,541 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-10-23 18:16:00,541 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 19) no Hoare annotation was computed. [2020-10-23 18:16:00,541 INFO L270 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-10-23 18:16:00,542 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-10-23 18:16:00,542 INFO L274 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-10-23 18:16:00,542 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-10-23 18:16:00,542 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-23 18:16:00,542 INFO L274 CegarLoopResult]: For program point L16-2(lines 13 19) no Hoare annotation was computed. [2020-10-23 18:16:00,542 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2020-10-23 18:16:00,542 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-23 18:16:00,542 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-23 18:16:00,542 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-10-23 18:16:00,543 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-10-23 18:16:00,543 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-23 18:16:00,543 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-23 18:16:00,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:16:00 BoogieIcfgContainer [2020-10-23 18:16:00,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:16:00,553 INFO L168 Benchmark]: Toolchain (without parser) took 6621.90 ms. Allocated memory was 152.0 MB in the beginning and 186.6 MB in the end (delta: 34.6 MB). Free memory was 127.8 MB in the beginning and 128.7 MB in the end (delta: -906.4 kB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:00,553 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:16:00,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.09 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 118.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:00,555 INFO L168 Benchmark]: Boogie Preprocessor took 37.35 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 116.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:00,556 INFO L168 Benchmark]: RCFGBuilder took 584.69 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 104.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:00,557 INFO L168 Benchmark]: TraceAbstraction took 5732.95 ms. Allocated memory was 152.0 MB in the beginning and 186.6 MB in the end (delta: 34.6 MB). Free memory was 104.1 MB in the beginning and 128.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:00,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.09 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 118.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.35 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 116.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 584.69 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 104.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5732.95 ms. Allocated memory was 152.0 MB in the beginning and 186.6 MB in the end (delta: 34.6 MB). Free memory was 104.1 MB in the beginning and 128.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 71 SDslu, 269 SDs, 0 SdLazy, 391 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 227 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=5, 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, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 16 PreInvPairs, 16 NumberOfFragments, 39 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 120 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 269 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 259 ConstructedInterpolants, 0 QuantifiedInterpolants, 23401 SizeOfPredicates, 8 NumberOfNonLiveVariables, 474 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 102/138 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...