java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/array-crafted/xor5.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:40:57,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:40:57,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:40:57,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:40:57,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:40:57,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:40:57,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:40:57,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:40:57,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:40:57,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:40:57,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:40:57,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:40:57,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:40:57,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:40:57,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:40:57,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:40:57,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:40:57,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:40:57,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:40:57,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:40:57,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:40:57,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:40:57,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:40:57,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:40:57,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:40:57,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:40:57,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:40:57,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:40:57,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:40:57,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:40:57,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:40:57,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:40:57,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:40:57,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:40:57,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:40:57,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:40:57,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:40:57,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:40:57,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:40:57,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:40:57,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:40:57,943 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 [2019-10-14 21:40:57,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:40:57,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:40:57,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:40:57,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:40:57,985 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:40:57,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:40:57,987 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:40:57,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:40:57,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:40:57,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:40:57,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:40:57,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:40:57,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:40:57,988 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:40:57,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:40:57,989 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:40:57,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:40:57,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:40:57,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:40:57,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:40:57,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:40:57,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:40:57,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:40:57,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:40:57,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:40:57,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:40:57,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:40:57,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:40:57,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:40:58,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:40:58,302 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:40:58,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:40:58,307 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:40:58,307 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:40:58,308 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor5.i [2019-10-14 21:40:58,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661e5920b/cc2522aae36d498fa1b2d914ad961e1c/FLAG28f82d236 [2019-10-14 21:40:58,820 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:40:58,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor5.i [2019-10-14 21:40:58,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661e5920b/cc2522aae36d498fa1b2d914ad961e1c/FLAG28f82d236 [2019-10-14 21:40:59,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661e5920b/cc2522aae36d498fa1b2d914ad961e1c [2019-10-14 21:40:59,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:40:59,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:40:59,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:59,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:40:59,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:40:59,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce7b69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59, skipping insertion in model container [2019-10-14 21:40:59,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,219 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:40:59,238 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:40:59,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:59,448 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:40:59,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:59,573 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:40:59,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59 WrapperNode [2019-10-14 21:40:59,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:59,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:40:59,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:40:59,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:40:59,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (1/1) ... [2019-10-14 21:40:59,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:40:59,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:40:59,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:40:59,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:40:59,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (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 [2019-10-14 21:40:59,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:40:59,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:40:59,674 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-10-14 21:40:59,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:40:59,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:40:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:40:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-10-14 21:40:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:40:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:40:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:40:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:40:59,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:40:59,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:40:59,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:40:59,997 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:40:59,997 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:40:59,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:59 BoogieIcfgContainer [2019-10-14 21:40:59,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:00,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:00,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:00,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:00,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:59" (1/3) ... [2019-10-14 21:41:00,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fdc957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:00, skipping insertion in model container [2019-10-14 21:41:00,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:59" (2/3) ... [2019-10-14 21:41:00,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fdc957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:00, skipping insertion in model container [2019-10-14 21:41:00,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:59" (3/3) ... [2019-10-14 21:41:00,008 INFO L109 eAbstractionObserver]: Analyzing ICFG xor5.i [2019-10-14 21:41:00,017 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:00,025 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:00,039 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:00,068 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:00,068 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:00,069 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:00,069 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:00,069 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:00,069 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:00,069 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:00,069 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 21:41:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:41:00,096 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:00,098 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:00,100 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash 911672298, now seen corresponding path program 1 times [2019-10-14 21:41:00,112 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:00,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107843791] [2019-10-14 21:41:00,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:41:00,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107843791] [2019-10-14 21:41:00,341 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:00,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:00,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111756862] [2019-10-14 21:41:00,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:00,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:00,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:00,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:00,367 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-14 21:41:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:00,503 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-10-14 21:41:00,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:00,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-10-14 21:41:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:00,514 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:41:00,515 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:41:00,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:41:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:41:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:41:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:41:00,559 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2019-10-14 21:41:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:00,559 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:41:00,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:41:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:41:00,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:00,562 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:00,563 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:00,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1776857700, now seen corresponding path program 1 times [2019-10-14 21:41:00,563 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:00,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240275104] [2019-10-14 21:41:00,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:41:00,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240275104] [2019-10-14 21:41:00,755 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:00,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:00,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289104820] [2019-10-14 21:41:00,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:00,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:00,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:00,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:00,759 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-10-14 21:41:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:00,849 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2019-10-14 21:41:00,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:00,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-10-14 21:41:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:00,851 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:41:00,851 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:41:00,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:41:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:41:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:41:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:41:00,861 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 33 [2019-10-14 21:41:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:00,861 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:41:00,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:41:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:41:00,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:00,863 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:00,864 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash -725304090, now seen corresponding path program 1 times [2019-10-14 21:41:00,865 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:00,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523930474] [2019-10-14 21:41:00,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:01,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523930474] [2019-10-14 21:41:01,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86257399] [2019-10-14 21:41:01,036 INFO L94 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 [2019-10-14 21:41:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:01,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:41:01,188 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:01,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:41:01,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474703802] [2019-10-14 21:41:01,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:01,189 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:01,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:01,190 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2019-10-14 21:41:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:01,417 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2019-10-14 21:41:01,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:41:01,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-10-14 21:41:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:01,419 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:41:01,419 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:41:01,420 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:41:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:41:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-10-14 21:41:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:41:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-14 21:41:01,432 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 35 [2019-10-14 21:41:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:01,433 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-14 21:41:01,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-14 21:41:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:41:01,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:01,438 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:01,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:01,642 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:01,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1245458630, now seen corresponding path program 1 times [2019-10-14 21:41:01,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:01,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252302854] [2019-10-14 21:41:01,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:41:01,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252302854] [2019-10-14 21:41:01,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086846890] [2019-10-14 21:41:01,768 INFO L94 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 [2019-10-14 21:41:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:41:01,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:41:01,870 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:41:01,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2019-10-14 21:41:01,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855167283] [2019-10-14 21:41:01,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:01,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:01,872 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2019-10-14 21:41:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:01,915 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-14 21:41:01,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:01,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-14 21:41:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:01,917 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:41:01,917 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:41:01,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:41:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 21:41:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:41:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-14 21:41:01,925 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 43 [2019-10-14 21:41:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:01,927 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-14 21:41:01,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-14 21:41:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:41:01,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:01,928 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:02,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:02,133 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1209882084, now seen corresponding path program 1 times [2019-10-14 21:41:02,134 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:02,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940887230] [2019-10-14 21:41:02,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 21:41:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 21:41:02,360 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-14 21:41:02,361 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-14 21:41:02,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 09:41:02 BoogieIcfgContainer [2019-10-14 21:41:02,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 21:41:02,423 INFO L168 Benchmark]: Toolchain (without parser) took 3221.12 ms. Allocated memory was 137.4 MB in the beginning and 231.7 MB in the end (delta: 94.4 MB). Free memory was 102.3 MB in the beginning and 121.5 MB in the end (delta: -19.2 MB). Peak memory consumption was 75.2 MB. Max. memory is 7.1 GB. [2019-10-14 21:41:02,424 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-14 21:41:02,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.67 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 102.1 MB in the beginning and 180.1 MB in the end (delta: -78.0 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2019-10-14 21:41:02,426 INFO L168 Benchmark]: Boogie Preprocessor took 45.99 ms. Allocated memory is still 200.8 MB. Free memory was 180.1 MB in the beginning and 177.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-10-14 21:41:02,427 INFO L168 Benchmark]: RCFGBuilder took 378.65 ms. Allocated memory is still 200.8 MB. Free memory was 177.6 MB in the beginning and 160.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2019-10-14 21:41:02,428 INFO L168 Benchmark]: TraceAbstraction took 2420.14 ms. Allocated memory was 200.8 MB in the beginning and 231.7 MB in the end (delta: 30.9 MB). Free memory was 160.5 MB in the beginning and 121.5 MB in the end (delta: 39.0 MB). Peak memory consumption was 69.9 MB. Max. memory is 7.1 GB. [2019-10-14 21:41:02,433 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 371.67 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 102.1 MB in the beginning and 180.1 MB in the end (delta: -78.0 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.99 ms. Allocated memory is still 200.8 MB. Free memory was 180.1 MB in the beginning and 177.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 378.65 ms. Allocated memory is still 200.8 MB. Free memory was 177.6 MB in the beginning and 160.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2420.14 ms. Allocated memory was 200.8 MB in the beginning and 231.7 MB in the end (delta: 30.9 MB). Free memory was 160.5 MB in the beginning and 121.5 MB in the end (delta: 39.0 MB). Peak memory consumption was 69.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 46]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseXor at line 14. Possible FailurePath: [L6] int N; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND TRUE N > 1 [L23] int x[N]; [L24] int temp; [L25] int ret; [L26] int ret2; [L27] int ret5; [L29] int i = 0; VAL [\old(N)=0, i=0, N=2, x={1:0}] [L29] COND TRUE i < N [L31] x[i] = __VERIFIER_nondet_int() [L29] i++ VAL [\old(N)=0, i=1, N=2, x={1:0}] [L29] COND TRUE i < N [L31] x[i] = __VERIFIER_nondet_int() [L29] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={1:0}] [L34] CALL, EXPR xor(x) VAL [\old(N)=0, N=2, x={1:0}] [L10] int i; [L11] long long res; [L12] EXPR x[0] [L12] res = x[0] [L13] i = 1 VAL [\old(N)=0, i=1, N=2, res=0, x={1:0}, x={1:0}] [L13] COND TRUE i < N [L14] EXPR x[i] [L14] res = res ^ x[i] [L13] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L13] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L16] return res; VAL [\old(N)=0, \result=-2, i=2, N=2, res=4294967294, x={1:0}, x={1:0}] [L34] RET, EXPR xor(x) VAL [\old(N)=0, i=2, N=2, x={1:0}, xor(x)=-2] [L34] ret = xor(x) [L36] EXPR x[0] [L36] temp=x[0] [L36] EXPR x[1] [L36] x[0] = x[1] [L36] x[1] = temp VAL [\old(N)=0, i=2, N=2, ret=-2, temp=0, x={1:0}] [L37] CALL, EXPR xor(x) VAL [\old(N)=0, N=2, x={1:0}] [L10] int i; [L11] long long res; [L12] EXPR x[0] [L12] res = x[0] [L13] i = 1 VAL [\old(N)=0, i=1, N=2, res=0, x={1:0}, x={1:0}] [L13] COND TRUE i < N [L14] EXPR x[i] [L14] res = res ^ x[i] [L13] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L13] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L16] return res; VAL [\old(N)=0, \result=-3, i=2, N=2, res=4294967293, x={1:0}, x={1:0}] [L37] RET, EXPR xor(x) VAL [\old(N)=0, i=2, N=2, ret=-2, temp=0, x={1:0}, xor(x)=-3] [L37] ret2 = xor(x) [L38] EXPR x[0] [L38] temp=x[0] [L39] int i =0 ; VAL [\old(N)=0, i=2, i=0, N=2, ret=-2, ret2=-3, temp=0, x={1:0}] [L39] COND TRUE i