/usr/bin/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/recursive-simple/id_b3_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:59:41,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:59:41,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:59:41,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:59:41,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:59:41,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:59:41,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:59:41,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:59:41,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:59:41,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:59:41,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:59:41,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:59:41,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:59:41,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:59:41,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:59:41,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:59:41,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:59:41,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:59:41,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:59:41,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:59:41,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:59:41,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:59:41,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:59:41,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:59:41,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 11:59:41,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 11:59:41,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 11:59:41,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 11:59:41,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 11:59:41,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 11:59:41,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 11:59:41,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 11:59:41,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 11:59:41,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 11:59:41,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 11:59:41,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 11:59:41,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 11:59:41,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 11:59:41,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:59:41,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:59:41,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:59:41,875 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 [2020-07-17 11:59:41,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:59:41,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:59:41,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:59:41,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:59:41,920 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:59:41,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:59:41,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:59:41,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:59:41,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:59:41,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:59:41,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:59:41,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:59:41,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:59:41,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:59:41,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:59:41,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:59:41,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:59:41,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:59:41,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:59:41,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:59:41,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:59:41,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:59:41,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:59:41,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:59:41,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:59:41,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:59:41,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:59:41,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:59:41,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:59:41,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:59:42,241 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:59:42,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:59:42,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:59:42,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:59:42,268 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:59:42,269 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c [2020-07-17 11:59:42,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a3b0e47/3c2750bc5f4a4e27ae4b0e80a9c3b9fa/FLAG248d9f1c9 [2020-07-17 11:59:42,840 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:59:42,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c [2020-07-17 11:59:42,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a3b0e47/3c2750bc5f4a4e27ae4b0e80a9c3b9fa/FLAG248d9f1c9 [2020-07-17 11:59:43,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a3b0e47/3c2750bc5f4a4e27ae4b0e80a9c3b9fa [2020-07-17 11:59:43,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:59:43,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:59:43,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:43,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:59:43,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:59:43,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233cbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43, skipping insertion in model container [2020-07-17 11:59:43,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:59:43,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:59:43,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:43,429 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:59:43,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:43,462 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:59:43,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43 WrapperNode [2020-07-17 11:59:43,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:43,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:59:43,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:59:43,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:59:43,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (1/1) ... [2020-07-17 11:59:43,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:59:43,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:59:43,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:59:43,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:59:43,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (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 [2020-07-17 11:59:43,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:59:43,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:59:43,656 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-17 11:59:43,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:59:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:59:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:59:43,656 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-17 11:59:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:59:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:59:43,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:59:43,860 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:59:43,863 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:59:43,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:43 BoogieIcfgContainer [2020-07-17 11:59:43,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:59:43,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:59:43,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:59:43,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:59:43,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:59:43" (1/3) ... [2020-07-17 11:59:43,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdaabb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:43, skipping insertion in model container [2020-07-17 11:59:43,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:43" (2/3) ... [2020-07-17 11:59:43,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdaabb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:43, skipping insertion in model container [2020-07-17 11:59:43,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:43" (3/3) ... [2020-07-17 11:59:43,902 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o5-2.c [2020-07-17 11:59:43,926 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:59:43,952 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:59:43,968 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:59:43,994 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:59:43,995 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:59:43,995 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:59:43,995 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:59:43,995 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:59:43,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:59:43,995 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:59:43,996 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:59:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-17 11:59:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 11:59:44,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:44,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:44,028 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:44,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:44,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-07-17 11:59:44,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:44,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674183358] [2020-07-17 11:59:44,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:59:44,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674183358] [2020-07-17 11:59:44,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:59:44,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:59:44,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364621737] [2020-07-17 11:59:44,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:59:44,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:59:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:44,267 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-17 11:59:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:44,331 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-17 11:59:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:59:44,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-17 11:59:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:44,343 INFO L225 Difference]: With dead ends: 33 [2020-07-17 11:59:44,344 INFO L226 Difference]: Without dead ends: 19 [2020-07-17 11:59:44,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-17 11:59:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-17 11:59:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-17 11:59:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-17 11:59:44,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-07-17 11:59:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:44,398 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-17 11:59:44,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:59:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-17 11:59:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 11:59:44,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:44,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:44,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:59:44,402 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-07-17 11:59:44,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:44,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025342269] [2020-07-17 11:59:44,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:44,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025342269] [2020-07-17 11:59:44,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:59:44,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 11:59:44,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000293012] [2020-07-17 11:59:44,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 11:59:44,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:44,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 11:59:44,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:59:44,643 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-07-17 11:59:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:44,692 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-17 11:59:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:59:44,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-17 11:59:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:44,695 INFO L225 Difference]: With dead ends: 31 [2020-07-17 11:59:44,695 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 11:59:44,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:59:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 11:59:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-17 11:59:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 11:59:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-17 11:59:44,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-07-17 11:59:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:44,705 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-17 11:59:44,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 11:59:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-17 11:59:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 11:59:44,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:44,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:44,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 11:59:44,708 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-07-17 11:59:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:44,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831803552] [2020-07-17 11:59:44,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:44,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831803552] [2020-07-17 11:59:44,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534293688] [2020-07-17 11:59:44,847 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 [2020-07-17 11:59:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:44,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 11:59:44,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 11:59:44,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:44,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-17 11:59:44,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822952833] [2020-07-17 11:59:44,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 11:59:44,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:44,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 11:59:44,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:59:44,976 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-07-17 11:59:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:45,033 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-17 11:59:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 11:59:45,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-07-17 11:59:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:45,035 INFO L225 Difference]: With dead ends: 27 [2020-07-17 11:59:45,035 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 11:59:45,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:59:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 11:59:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-17 11:59:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 11:59:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-17 11:59:45,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-07-17 11:59:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:45,044 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-17 11:59:45,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 11:59:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-17 11:59:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 11:59:45,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:45,046 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:45,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 11:59:45,260 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:45,261 INFO L82 PathProgramCache]: Analyzing trace with hash 376843494, now seen corresponding path program 1 times [2020-07-17 11:59:45,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:45,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991879294] [2020-07-17 11:59:45,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:45,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991879294] [2020-07-17 11:59:45,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057857824] [2020-07-17 11:59:45,517 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 [2020-07-17 11:59:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 11:59:45,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:45,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:45,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-17 11:59:45,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278040867] [2020-07-17 11:59:45,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 11:59:45,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:45,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 11:59:45,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:59:45,614 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-07-17 11:59:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:45,659 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-17 11:59:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 11:59:45,660 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-17 11:59:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:45,661 INFO L225 Difference]: With dead ends: 35 [2020-07-17 11:59:45,662 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 11:59:45,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:59:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 11:59:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-17 11:59:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 11:59:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-17 11:59:45,669 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 27 [2020-07-17 11:59:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:45,669 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-17 11:59:45,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 11:59:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-17 11:59:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 11:59:45,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:45,671 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:45,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:45,886 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:45,886 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2020-07-17 11:59:45,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:45,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813476101] [2020-07-17 11:59:45,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:46,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813476101] [2020-07-17 11:59:46,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653135092] [2020-07-17 11:59:46,061 INFO L92 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 [2020-07-17 11:59:46,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:46,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:46,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 11:59:46,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:59:46,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:46,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-17 11:59:46,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012833883] [2020-07-17 11:59:46,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 11:59:46,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:46,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 11:59:46,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-17 11:59:46,155 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2020-07-17 11:59:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:46,225 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-17 11:59:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 11:59:46,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-07-17 11:59:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:46,227 INFO L225 Difference]: With dead ends: 31 [2020-07-17 11:59:46,227 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 11:59:46,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:59:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 11:59:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-17 11:59:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 11:59:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-17 11:59:46,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2020-07-17 11:59:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:46,234 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-17 11:59:46,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 11:59:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-17 11:59:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 11:59:46,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:46,236 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:46,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:46,450 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:46,451 INFO L82 PathProgramCache]: Analyzing trace with hash -645661089, now seen corresponding path program 2 times [2020-07-17 11:59:46,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:46,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127400619] [2020-07-17 11:59:46,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-17 11:59:46,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127400619] [2020-07-17 11:59:46,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:59:46,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:59:46,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210571395] [2020-07-17 11:59:46,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:59:46,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:59:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:46,528 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-07-17 11:59:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:46,537 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-17 11:59:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:59:46,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-17 11:59:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:46,539 INFO L225 Difference]: With dead ends: 27 [2020-07-17 11:59:46,539 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 11:59:46,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 11:59:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 11:59:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 11:59:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 11:59:46,541 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-17 11:59:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:46,542 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 11:59:46,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:59:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 11:59:46,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 11:59:46,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 11:59:46,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 11:59:46,567 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 11:59:46,568 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:59:46,568 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:59:46,568 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 11:59:46,568 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 11:59:46,568 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 11:59:46,568 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-07-17 11:59:46,569 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-17 11:59:46,569 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-17 11:59:46,569 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-17 11:59:46,569 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-07-17 11:59:46,569 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-07-17 11:59:46,569 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-17 11:59:46,570 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-07-17 11:59:46,570 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-07-17 11:59:46,570 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-17 11:59:46,570 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-07-17 11:59:46,570 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-17 11:59:46,570 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-07-17 11:59:46,571 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-17 11:59:46,571 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-17 11:59:46,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:59:46 BoogieIcfgContainer [2020-07-17 11:59:46,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:59:46,581 INFO L168 Benchmark]: Toolchain (without parser) took 3371.87 ms. Allocated memory was 137.4 MB in the beginning and 232.3 MB in the end (delta: 94.9 MB). Free memory was 102.4 MB in the beginning and 128.6 MB in the end (delta: -26.2 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:46,582 INFO L168 Benchmark]: CDTParser took 1.66 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-17 11:59:46,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.28 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 92.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:46,584 INFO L168 Benchmark]: Boogie Preprocessor took 107.95 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 180.6 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:46,585 INFO L168 Benchmark]: RCFGBuilder took 303.22 ms. Allocated memory is still 201.3 MB. Free memory was 180.6 MB in the beginning and 168.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:46,586 INFO L168 Benchmark]: TraceAbstraction took 2701.18 ms. Allocated memory was 201.3 MB in the beginning and 232.3 MB in the end (delta: 30.9 MB). Free memory was 167.8 MB in the beginning and 128.6 MB in the end (delta: 39.2 MB). Peak memory consumption was 70.2 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:46,590 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.66 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.28 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 92.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.95 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 180.6 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 303.22 ms. Allocated memory is still 201.3 MB. Free memory was 180.6 MB in the beginning and 168.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2701.18 ms. Allocated memory was 201.3 MB in the beginning and 232.3 MB in the end (delta: 30.9 MB). Free memory was 167.8 MB in the beginning and 128.6 MB in the end (delta: 39.2 MB). Peak memory consumption was 70.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 111 SDtfs, 18 SDslu, 474 SDs, 0 SdLazy, 107 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 206 ConstructedInterpolants, 0 QuantifiedInterpolants, 9016 SizeOfPredicates, 7 NumberOfNonLiveVariables, 187 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 77/105 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...