/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/id2_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:12:14,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:12:14,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:12:15,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:12:15,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:12:15,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:12:15,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:12:15,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:12:15,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:12:15,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:12:15,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:12:15,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:12:15,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:12:15,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:12:15,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:12:15,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:12:15,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:12:15,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:12:15,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:12:15,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:12:15,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:12:15,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:12:15,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:12:15,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:12:15,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:12:15,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:12:15,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:12:15,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:12:15,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:12:15,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:12:15,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:12:15,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:12:15,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:12:15,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:12:15,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:12:15,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:12:15,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:12:15,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:12:15,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:12:15,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:12:15,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:12:15,083 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 [2020-07-07 11:12:15,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:12:15,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:12:15,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:12:15,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:12:15,101 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:12:15,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:12:15,101 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:12:15,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:12:15,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:12:15,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:12:15,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:12:15,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:12:15,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:12:15,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:12:15,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:12:15,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:12:15,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:12:15,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:12:15,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:12:15,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:12:15,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:12:15,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:12:15,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:12:15,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:12:15,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:12:15,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:12:15,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:12:15,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:12:15,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:12:15,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:12:15,377 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:12:15,387 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:12:15,394 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:12:15,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:12:15,395 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:12:15,396 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-07-07 11:12:15,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c108651db/2330b00ba3404c009d91b41c3d46599f/FLAGbb4199d6e [2020-07-07 11:12:15,853 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:12:15,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-07-07 11:12:15,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c108651db/2330b00ba3404c009d91b41c3d46599f/FLAGbb4199d6e [2020-07-07 11:12:16,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c108651db/2330b00ba3404c009d91b41c3d46599f [2020-07-07 11:12:16,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:12:16,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:12:16,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:16,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:12:16,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:12:16,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af7a474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16, skipping insertion in model container [2020-07-07 11:12:16,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:12:16,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:12:16,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:16,505 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:12:16,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:16,541 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:12:16,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16 WrapperNode [2020-07-07 11:12:16,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:16,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:12:16,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:12:16,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:12:16,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (1/1) ... [2020-07-07 11:12:16,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:12:16,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:12:16,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:12:16,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:12:16,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (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 [2020-07-07 11:12:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:12:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:12:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 11:12:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-07-07 11:12:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:12:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:12:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:12:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 11:12:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-07-07 11:12:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:12:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:12:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:12:16,910 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:12:16,911 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:12:16,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:16 BoogieIcfgContainer [2020-07-07 11:12:16,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:12:16,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:12:16,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:12:16,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:12:16,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:12:16" (1/3) ... [2020-07-07 11:12:16,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210f8046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:16, skipping insertion in model container [2020-07-07 11:12:16,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:16" (2/3) ... [2020-07-07 11:12:16,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210f8046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:16, skipping insertion in model container [2020-07-07 11:12:16,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:16" (3/3) ... [2020-07-07 11:12:16,924 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-07-07 11:12:16,935 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:12:16,942 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:12:16,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:12:17,023 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:12:17,023 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:12:17,024 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:12:17,024 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:12:17,024 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:12:17,024 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:12:17,025 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:12:17,025 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:12:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-07 11:12:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:12:17,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:17,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:17,088 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:17,093 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2020-07-07 11:12:17,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:17,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77130980] [2020-07-07 11:12:17,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:12:17,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77130980] [2020-07-07 11:12:17,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:17,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:12:17,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721894829] [2020-07-07 11:12:17,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:12:17,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:12:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:17,310 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-07-07 11:12:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:17,380 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-07 11:12:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:17,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:12:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:17,393 INFO L225 Difference]: With dead ends: 36 [2020-07-07 11:12:17,393 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:12:17,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:12:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:12:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 11:12:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:12:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-07-07 11:12:17,441 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-07-07 11:12:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:17,442 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-07-07 11:12:17,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:12:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-07 11:12:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:12:17,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:17,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:17,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:12:17,446 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2020-07-07 11:12:17,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:17,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646126208] [2020-07-07 11:12:17,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:12:17,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646126208] [2020-07-07 11:12:17,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:17,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 11:12:17,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675153670] [2020-07-07 11:12:17,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:12:17,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:12:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:12:17,575 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-07-07 11:12:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:17,668 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-07 11:12:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:12:17,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-07 11:12:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:17,670 INFO L225 Difference]: With dead ends: 33 [2020-07-07 11:12:17,671 INFO L226 Difference]: Without dead ends: 29 [2020-07-07 11:12:17,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:12:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-07 11:12:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-07 11:12:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:12:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-07 11:12:17,680 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-07-07 11:12:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:17,681 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-07 11:12:17,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:12:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-07 11:12:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:12:17,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:17,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:17,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:12:17,688 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2020-07-07 11:12:17,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:17,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137647625] [2020-07-07 11:12:17,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:17,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137647625] [2020-07-07 11:12:17,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646455931] [2020-07-07 11:12:17,836 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 [2020-07-07 11:12:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:17,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:12:17,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:17,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:17,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-07 11:12:17,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351652757] [2020-07-07 11:12:17,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:12:17,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:12:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:12:17,993 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-07-07 11:12:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:18,096 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-07 11:12:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:12:18,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-07 11:12:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:18,099 INFO L225 Difference]: With dead ends: 39 [2020-07-07 11:12:18,099 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 11:12:18,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:12:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 11:12:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-07-07 11:12:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:12:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-07-07 11:12:18,124 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-07-07 11:12:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:18,124 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-07-07 11:12:18,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:12:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-07-07 11:12:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:12:18,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:18,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:18,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:12:18,342 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:18,343 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2020-07-07 11:12:18,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:18,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886618205] [2020-07-07 11:12:18,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:12:18,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886618205] [2020-07-07 11:12:18,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110065014] [2020-07-07 11:12:18,582 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) [2020-07-07 11:12:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:18,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:12:18,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:18,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-07 11:12:18,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404780655] [2020-07-07 11:12:18,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:12:18,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:18,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:12:18,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:12:18,666 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-07-07 11:12:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:18,763 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-07-07 11:12:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:12:18,764 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-07-07 11:12:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:18,765 INFO L225 Difference]: With dead ends: 45 [2020-07-07 11:12:18,765 INFO L226 Difference]: Without dead ends: 41 [2020-07-07 11:12:18,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:12:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-07 11:12:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-07 11:12:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:12:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-07-07 11:12:18,774 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-07-07 11:12:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:18,774 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-07-07 11:12:18,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:12:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-07-07 11:12:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:12:18,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:18,776 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:18,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:18,992 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2020-07-07 11:12:18,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:18,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115601401] [2020-07-07 11:12:18,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-07 11:12:19,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115601401] [2020-07-07 11:12:19,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99850808] [2020-07-07 11:12:19,202 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 [2020-07-07 11:12:19,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:19,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:19,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:12:19,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-07 11:12:19,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:19,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-07-07 11:12:19,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980088489] [2020-07-07 11:12:19,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:12:19,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:19,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:12:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:12:19,297 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 13 states. [2020-07-07 11:12:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:19,426 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-07-07 11:12:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:12:19,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-07-07 11:12:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:19,429 INFO L225 Difference]: With dead ends: 51 [2020-07-07 11:12:19,429 INFO L226 Difference]: Without dead ends: 47 [2020-07-07 11:12:19,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:12:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-07 11:12:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-07-07 11:12:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:12:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-07 11:12:19,438 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2020-07-07 11:12:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:19,438 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-07 11:12:19,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:12:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-07 11:12:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 11:12:19,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:19,441 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:19,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:19,655 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2020-07-07 11:12:19,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:19,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361836416] [2020-07-07 11:12:19,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-07 11:12:20,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361836416] [2020-07-07 11:12:20,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228406103] [2020-07-07 11:12:20,010 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:20,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:20,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:20,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-07 11:12:20,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-07 11:12:20,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:20,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-07-07 11:12:20,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210519120] [2020-07-07 11:12:20,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:12:20,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:20,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:12:20,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:12:20,150 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2020-07-07 11:12:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:20,259 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-07-07 11:12:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:12:20,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-07-07 11:12:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:20,264 INFO L225 Difference]: With dead ends: 57 [2020-07-07 11:12:20,264 INFO L226 Difference]: Without dead ends: 53 [2020-07-07 11:12:20,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:12:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-07 11:12:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-07-07 11:12:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:12:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-07 11:12:20,278 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-07-07 11:12:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:20,278 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-07 11:12:20,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:12:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-07 11:12:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:12:20,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:20,281 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:20,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:20,484 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:20,484 INFO L82 PathProgramCache]: Analyzing trace with hash 706413819, now seen corresponding path program 3 times [2020-07-07 11:12:20,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:20,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090234625] [2020-07-07 11:12:20,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-07 11:12:20,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090234625] [2020-07-07 11:12:20,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176874692] [2020-07-07 11:12:20,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:20,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:12:20,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:20,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:12:20,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-07 11:12:20,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:12:20,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 16 [2020-07-07 11:12:20,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301796762] [2020-07-07 11:12:20,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:12:20,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:20,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:12:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:12:20,920 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-07-07 11:12:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:21,120 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-07-07 11:12:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:12:21,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-07 11:12:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:21,122 INFO L225 Difference]: With dead ends: 63 [2020-07-07 11:12:21,122 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:12:21,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:12:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:12:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-07 11:12:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:12:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:12:21,129 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 49 [2020-07-07 11:12:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:21,130 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:12:21,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:12:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:12:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:12:21,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:21,132 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:21,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:12:21,346 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:21,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1492956279, now seen corresponding path program 3 times [2020-07-07 11:12:21,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:21,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493742666] [2020-07-07 11:12:21,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-07 11:12:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493742666] [2020-07-07 11:12:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322712812] [2020-07-07 11:12:21,561 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:21,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:12:21,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:21,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:12:21,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-07 11:12:21,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:12:21,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 17 [2020-07-07 11:12:21,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951763115] [2020-07-07 11:12:21,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:12:21,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:21,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:12:21,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:12:21,680 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-07-07 11:12:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:21,871 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-07-07 11:12:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:12:21,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-07 11:12:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:21,873 INFO L225 Difference]: With dead ends: 39 [2020-07-07 11:12:21,873 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:12:21,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:12:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:12:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:12:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:12:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:12:21,875 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2020-07-07 11:12:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:21,875 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:12:21,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:12:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:12:21,875 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:12:22,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:22,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:12:22,114 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:12:22,114 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:12:22,114 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2020-07-07 11:12:22,114 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-07 11:12:22,114 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-07 11:12:22,114 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 12 15) no Hoare annotation was computed. [2020-07-07 11:12:22,115 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 12 15) the Hoare annotation is: true [2020-07-07 11:12:22,115 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 12 15) no Hoare annotation was computed. [2020-07-07 11:12:22,115 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:12:22,115 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:12:22,115 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:12:22,115 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:12:22,115 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-07-07 11:12:22,116 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 23) the Hoare annotation is: true [2020-07-07 11:12:22,116 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 23) no Hoare annotation was computed. [2020-07-07 11:12:22,116 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-07-07 11:12:22,116 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-07-07 11:12:22,116 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2020-07-07 11:12:22,116 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-07 11:12:22,116 INFO L268 CegarLoopResult]: For program point L20-2(lines 17 23) no Hoare annotation was computed. [2020-07-07 11:12:22,117 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 10) no Hoare annotation was computed. [2020-07-07 11:12:22,117 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 10) no Hoare annotation was computed. [2020-07-07 11:12:22,117 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-07 11:12:22,117 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-07 11:12:22,117 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-07 11:12:22,117 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 10) the Hoare annotation is: true [2020-07-07 11:12:22,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:12:22 BoogieIcfgContainer [2020-07-07 11:12:22,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:12:22,125 INFO L168 Benchmark]: Toolchain (without parser) took 5881.77 ms. Allocated memory was 138.4 MB in the beginning and 248.0 MB in the end (delta: 109.6 MB). Free memory was 102.5 MB in the beginning and 98.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:22,126 INFO L168 Benchmark]: CDTParser took 1.40 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 11:12:22,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.37 ms. Allocated memory is still 138.4 MB. Free memory was 102.3 MB in the beginning and 92.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:22,127 INFO L168 Benchmark]: Boogie Preprocessor took 31.55 ms. Allocated memory is still 138.4 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:22,128 INFO L168 Benchmark]: RCFGBuilder took 340.62 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 170.6 MB in the end (delta: -79.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:22,129 INFO L168 Benchmark]: TraceAbstraction took 5206.09 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 169.9 MB in the beginning and 98.4 MB in the end (delta: 71.5 MB). Peak memory consumption was 116.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:22,133 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.40 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.37 ms. Allocated memory is still 138.4 MB. Free memory was 102.3 MB in the beginning and 92.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.55 ms. Allocated memory is still 138.4 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 340.62 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 170.6 MB in the end (delta: -79.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5206.09 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 169.9 MB in the beginning and 98.4 MB in the end (delta: 71.5 MB). Peak memory consumption was 116.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 179 SDtfs, 111 SDslu, 1182 SDs, 0 SdLazy, 557 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 418 GetRequests, 304 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=6, 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, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 19 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 512 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 498 ConstructedInterpolants, 0 QuantifiedInterpolants, 52080 SizeOfPredicates, 33 NumberOfNonLiveVariables, 564 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 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...