/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:02:18,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:02:18,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:02:18,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:02:18,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:02:18,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:02:18,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:02:18,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:02:18,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:02:18,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:02:18,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:02:18,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:02:18,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:02:18,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:02:18,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:02:18,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:02:18,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:02:18,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:02:18,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:02:18,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:02:18,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:02:18,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:02:18,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:02:18,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:02:18,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:02:18,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:02:18,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:02:18,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:02:18,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:02:18,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-19 23:02:18,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:02:18,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:02:18,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:02:18,109 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 [2020-07-19 23:02:18,127 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:02:18,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:02:18,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:02:18,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:02:18,131 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:02:18,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:02:18,131 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:02:18,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:02:18,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:02:18,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:02:18,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:02:18,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:02:18,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:02:18,132 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:02:18,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:02:18,133 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:02:18,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:02:18,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:02:18,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:02:18,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:02:18,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:02:18,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:02:18,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:02:18,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:02:18,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:02:18,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:02:18,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:02:18,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:02:18,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:02:18,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:02:18,405 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:02:18,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:02:18,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:02:18,426 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:02:18,426 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:02:18,427 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-19 23:02:18,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31d499fc/3e598ba7a1e8407a9e0afc422815914a/FLAG67aee64c4 [2020-07-19 23:02:18,857 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:02:18,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-19 23:02:18,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31d499fc/3e598ba7a1e8407a9e0afc422815914a/FLAG67aee64c4 [2020-07-19 23:02:19,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31d499fc/3e598ba7a1e8407a9e0afc422815914a [2020-07-19 23:02:19,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:02:19,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:02:19,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:02:19,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:02:19,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:02:19,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ea4f067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19, skipping insertion in model container [2020-07-19 23:02:19,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:02:19,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:02:19,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:02:19,536 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:02:19,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:02:19,574 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:02:19,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19 WrapperNode [2020-07-19 23:02:19,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:02:19,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:02:19,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:02:19,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:02:19,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (1/1) ... [2020-07-19 23:02:19,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:02:19,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:02:19,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:02:19,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:02:19,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (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 [2020-07-19 23:02:19,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:02:19,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:02:19,793 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-19 23:02:19,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:02:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:02:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:02:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-19 23:02:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:02:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:02:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:02:19,982 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:02:19,982 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:02:19,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:02:19 BoogieIcfgContainer [2020-07-19 23:02:19,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:02:19,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:02:19,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:02:19,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:02:19,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:02:19" (1/3) ... [2020-07-19 23:02:19,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b41388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:02:19, skipping insertion in model container [2020-07-19 23:02:19,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:19" (2/3) ... [2020-07-19 23:02:19,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b41388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:02:19, skipping insertion in model container [2020-07-19 23:02:19,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:02:19" (3/3) ... [2020-07-19 23:02:19,995 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-07-19 23:02:20,006 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:02:20,013 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:02:20,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:02:20,055 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:02:20,055 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:02:20,055 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:02:20,055 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:02:20,055 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:02:20,055 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:02:20,056 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:02:20,056 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:02:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-19 23:02:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:02:20,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:20,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:20,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-19 23:02:20,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:20,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144971808] [2020-07-19 23:02:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:20,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144971808] [2020-07-19 23:02:20,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:20,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:02:20,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547894541] [2020-07-19 23:02:20,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:02:20,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:02:20,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:02:20,369 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-07-19 23:02:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:20,550 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-19 23:02:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:02:20,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-19 23:02:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:20,563 INFO L225 Difference]: With dead ends: 36 [2020-07-19 23:02:20,563 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 23:02:20,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:02:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 23:02:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-19 23:02:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-19 23:02:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-19 23:02:20,621 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-19 23:02:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:20,622 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-19 23:02:20,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:02:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-19 23:02:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:02:20,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:20,625 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:20,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:02:20,626 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-19 23:02:20,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:20,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928918623] [2020-07-19 23:02:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:02:20,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928918623] [2020-07-19 23:02:20,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126513920] [2020-07-19 23:02:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68fdb258 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:20,952 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68fdb258 issued 3 check-sat command(s) [2020-07-19 23:02:20,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 23:02:20,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 23:02:21,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:02:21,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2020-07-19 23:02:21,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556316373] [2020-07-19 23:02:21,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:02:21,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:21,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:02:21,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:02:21,027 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-07-19 23:02:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:21,110 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-07-19 23:02:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:02:21,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-19 23:02:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:21,113 INFO L225 Difference]: With dead ends: 39 [2020-07-19 23:02:21,113 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 23:02:21,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:02:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 23:02:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 23:02:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 23:02:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-19 23:02:21,124 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-07-19 23:02:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:21,124 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-19 23:02:21,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:02:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-19 23:02:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:02:21,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:21,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:21,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:02:21,333 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:21,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:21,334 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-19 23:02:21,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:21,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416122548] [2020-07-19 23:02:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:02:21,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416122548] [2020-07-19 23:02:21,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541023825] [2020-07-19 23:02:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46249575 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 [2020-07-19 23:02:21,560 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46249575 issued 4 check-sat command(s) [2020-07-19 23:02:21,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:21,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 23:02:21,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:02:21,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:21,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-07-19 23:02:21,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003284418] [2020-07-19 23:02:21,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:02:21,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:21,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:02:21,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:02:21,714 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 17 states. [2020-07-19 23:02:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:22,000 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-07-19 23:02:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:02:22,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-07-19 23:02:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:22,004 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:02:22,005 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:02:22,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:02:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:02:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-19 23:02:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 23:02:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-07-19 23:02:22,030 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2020-07-19 23:02:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:22,033 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-07-19 23:02:22,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:02:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-07-19 23:02:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-19 23:02:22,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:22,036 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:22,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:22,250 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2020-07-19 23:02:22,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:22,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001266689] [2020-07-19 23:02:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-19 23:02:22,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001266689] [2020-07-19 23:02:22,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331400267] [2020-07-19 23:02:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c5fae62 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:22,417 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c5fae62 issued 4 check-sat command(s) [2020-07-19 23:02:22,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:02:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-19 23:02:22,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:22,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2020-07-19 23:02:22,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988444209] [2020-07-19 23:02:22,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:02:22,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:02:22,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:02:22,478 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 10 states. [2020-07-19 23:02:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:22,643 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2020-07-19 23:02:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:02:22,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-07-19 23:02:22,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:22,647 INFO L225 Difference]: With dead ends: 56 [2020-07-19 23:02:22,647 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 23:02:22,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:02:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 23:02:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-07-19 23:02:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 23:02:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-07-19 23:02:22,658 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 41 [2020-07-19 23:02:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:22,658 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-07-19 23:02:22,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:02:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-07-19 23:02:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 23:02:22,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:22,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:22,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:22,876 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2020-07-19 23:02:22,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:22,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610753299] [2020-07-19 23:02:22,879 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 23:02:23,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610753299] [2020-07-19 23:02:23,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619831785] [2020-07-19 23:02:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@692e29f1 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 [2020-07-19 23:02:23,131 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@692e29f1 issued 4 check-sat command(s) [2020-07-19 23:02:23,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:23,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 23:02:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-19 23:02:23,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:23,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2020-07-19 23:02:23,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507916527] [2020-07-19 23:02:23,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:02:23,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:23,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:02:23,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:02:23,386 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 22 states. [2020-07-19 23:02:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:24,046 INFO L93 Difference]: Finished difference Result 66 states and 119 transitions. [2020-07-19 23:02:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 23:02:24,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-07-19 23:02:24,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:24,053 INFO L225 Difference]: With dead ends: 66 [2020-07-19 23:02:24,053 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:02:24,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 23:02:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:02:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-07-19 23:02:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 23:02:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 63 transitions. [2020-07-19 23:02:24,074 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 63 transitions. Word has length 42 [2020-07-19 23:02:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:24,074 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 63 transitions. [2020-07-19 23:02:24,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:02:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 63 transitions. [2020-07-19 23:02:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-19 23:02:24,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:24,078 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:24,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:24,292 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1434057987, now seen corresponding path program 4 times [2020-07-19 23:02:24,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:24,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991534087] [2020-07-19 23:02:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 57 proven. 89 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-19 23:02:24,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991534087] [2020-07-19 23:02:24,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163786311] [2020-07-19 23:02:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f7bc189 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:24,507 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f7bc189 issued 3 check-sat command(s) [2020-07-19 23:02:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:02:24,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 104 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-07-19 23:02:24,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:24,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-19 23:02:24,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758999606] [2020-07-19 23:02:24,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:02:24,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:24,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:02:24,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:02:24,579 INFO L87 Difference]: Start difference. First operand 41 states and 63 transitions. Second operand 11 states. [2020-07-19 23:02:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:24,828 INFO L93 Difference]: Finished difference Result 88 states and 151 transitions. [2020-07-19 23:02:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:02:24,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-07-19 23:02:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:24,836 INFO L225 Difference]: With dead ends: 88 [2020-07-19 23:02:24,836 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 23:02:24,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:02:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 23:02:24,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-07-19 23:02:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 23:02:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2020-07-19 23:02:24,869 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 83 [2020-07-19 23:02:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:24,870 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2020-07-19 23:02:24,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:02:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2020-07-19 23:02:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-19 23:02:24,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:24,877 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:25,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:02:25,078 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:25,079 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 5 times [2020-07-19 23:02:25,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:25,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299238670] [2020-07-19 23:02:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 151 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-07-19 23:02:25,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299238670] [2020-07-19 23:02:25,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342465963] [2020-07-19 23:02:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@180d35b8 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 [2020-07-19 23:02:25,340 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@180d35b8 issued 3 check-sat command(s) [2020-07-19 23:02:25,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:25,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 23:02:25,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 93 proven. 162 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-19 23:02:25,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:25,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2020-07-19 23:02:25,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539570710] [2020-07-19 23:02:25,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:02:25,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:02:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:02:25,434 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 13 states. [2020-07-19 23:02:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:25,793 INFO L93 Difference]: Finished difference Result 106 states and 166 transitions. [2020-07-19 23:02:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:02:25,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-07-19 23:02:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:25,796 INFO L225 Difference]: With dead ends: 106 [2020-07-19 23:02:25,796 INFO L226 Difference]: Without dead ends: 69 [2020-07-19 23:02:25,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:02:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-19 23:02:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-07-19 23:02:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 23:02:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2020-07-19 23:02:25,810 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 97 [2020-07-19 23:02:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:25,810 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2020-07-19 23:02:25,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:02:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2020-07-19 23:02:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-19 23:02:25,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:25,813 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:26,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:26,027 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash -680629368, now seen corresponding path program 6 times [2020-07-19 23:02:26,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:26,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086424345] [2020-07-19 23:02:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 183 proven. 243 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-07-19 23:02:26,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086424345] [2020-07-19 23:02:26,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248063023] [2020-07-19 23:02:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@790b8078 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:26,431 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@790b8078 issued 4 check-sat command(s) [2020-07-19 23:02:26,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:02:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 276 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-07-19 23:02:26,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:26,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2020-07-19 23:02:26,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665378700] [2020-07-19 23:02:26,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:02:26,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:26,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:02:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:02:26,513 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand 15 states. [2020-07-19 23:02:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:26,984 INFO L93 Difference]: Finished difference Result 130 states and 224 transitions. [2020-07-19 23:02:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:02:26,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 124 [2020-07-19 23:02:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:26,987 INFO L225 Difference]: With dead ends: 130 [2020-07-19 23:02:26,987 INFO L226 Difference]: Without dead ends: 79 [2020-07-19 23:02:26,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=607, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:02:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-19 23:02:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-07-19 23:02:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-19 23:02:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2020-07-19 23:02:27,019 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 124 [2020-07-19 23:02:27,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:27,020 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2020-07-19 23:02:27,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:02:27,020 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2020-07-19 23:02:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-19 23:02:27,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:27,026 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:27,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:27,240 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash 375112636, now seen corresponding path program 7 times [2020-07-19 23:02:27,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:27,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522365902] [2020-07-19 23:02:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 194 proven. 649 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2020-07-19 23:02:27,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522365902] [2020-07-19 23:02:27,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571360324] [2020-07-19 23:02:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@96e52ae No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:27,978 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@96e52ae issued 4 check-sat command(s) [2020-07-19 23:02:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-19 23:02:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 258 proven. 604 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-07-19 23:02:28,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:28,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 44 [2020-07-19 23:02:28,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453881305] [2020-07-19 23:02:28,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-19 23:02:28,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-19 23:02:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 23:02:28,770 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand 44 states. [2020-07-19 23:02:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:30,307 INFO L93 Difference]: Finished difference Result 112 states and 178 transitions. [2020-07-19 23:02:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-19 23:02:30,307 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 178 [2020-07-19 23:02:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:30,310 INFO L225 Difference]: With dead ends: 112 [2020-07-19 23:02:30,310 INFO L226 Difference]: Without dead ends: 106 [2020-07-19 23:02:30,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=696, Invalid=5004, Unknown=0, NotChecked=0, Total=5700 [2020-07-19 23:02:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-19 23:02:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-07-19 23:02:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-19 23:02:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2020-07-19 23:02:30,329 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 178 [2020-07-19 23:02:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:30,330 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2020-07-19 23:02:30,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-19 23:02:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2020-07-19 23:02:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-19 23:02:30,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:30,334 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 28, 17, 17, 17, 17, 17, 17, 17, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:30,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:02:30,549 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:30,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1066961481, now seen corresponding path program 8 times [2020-07-19 23:02:30,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:30,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705134878] [2020-07-19 23:02:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 569 proven. 903 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2020-07-19 23:02:31,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705134878] [2020-07-19 23:02:31,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134502373] [2020-07-19 23:02:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15b31b1e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:31,325 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15b31b1e issued 4 check-sat command(s) [2020-07-19 23:02:31,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:02:31,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1079 proven. 839 refuted. 0 times theorem prover too weak. 1384 trivial. 0 not checked. [2020-07-19 23:02:31,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:31,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2020-07-19 23:02:31,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773745215] [2020-07-19 23:02:31,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:02:31,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:31,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:02:31,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:02:31,472 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand 17 states. [2020-07-19 23:02:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:32,039 INFO L93 Difference]: Finished difference Result 163 states and 286 transitions. [2020-07-19 23:02:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 23:02:32,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 246 [2020-07-19 23:02:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:32,042 INFO L225 Difference]: With dead ends: 163 [2020-07-19 23:02:32,042 INFO L226 Difference]: Without dead ends: 94 [2020-07-19 23:02:32,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:02:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-19 23:02:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-07-19 23:02:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-19 23:02:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2020-07-19 23:02:32,054 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 246 [2020-07-19 23:02:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:32,058 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2020-07-19 23:02:32,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:02:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2020-07-19 23:02:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-19 23:02:32,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:32,063 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:32,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:32,277 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash 350025903, now seen corresponding path program 9 times [2020-07-19 23:02:32,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:32,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853864164] [2020-07-19 23:02:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b0741e5 [2020-07-19 23:02:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 551 proven. 558 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2020-07-19 23:02:32,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853864164] [2020-07-19 23:02:32,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887586540] [2020-07-19 23:02:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1919153d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:32,991 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1919153d issued 4 check-sat command(s) [2020-07-19 23:02:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:02:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 541 proven. 665 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2020-07-19 23:02:33,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:33,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 16 [2020-07-19 23:02:33,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870687795] [2020-07-19 23:02:33,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:02:33,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:33,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:02:33,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:02:33,110 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand 16 states. [2020-07-19 23:02:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:33,546 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-07-19 23:02:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:02:33,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 219 [2020-07-19 23:02:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:33,548 INFO L225 Difference]: With dead ends: 164 [2020-07-19 23:02:33,548 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:02:33,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:02:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:02:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:02:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:02:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:02:33,551 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2020-07-19 23:02:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:33,551 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:02:33,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:02:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:02:33,551 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:02:33,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:33,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:02:34,504 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 23 [2020-07-19 23:02:34,508 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-19 23:02:34,508 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-19 23:02:34,508 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= 2 |fibonacci_#in~n|) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-19 23:02:34,508 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-19 23:02:34,508 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (<= 1 |fibonacci_#t~ret0|) (or (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 1)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) (<= |fibonacci_#in~n| 4)) (and (<= |fibonacci_#in~n| 5) (<= 3 |fibonacci_#t~ret0|))) (<= 2 |fibonacci_#in~n|) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-19 23:02:34,509 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-19 23:02:34,509 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-19 23:02:34,509 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-19 23:02:34,509 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-19 23:02:34,509 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 23:02:34,509 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:02:34,509 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:02:34,509 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:02:34,510 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:02:34,510 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:02:34,510 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-19 23:02:34,510 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-19 23:02:34,510 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-19 23:02:34,510 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-19 23:02:34,510 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-19 23:02:34,510 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-19 23:02:34,511 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-19 23:02:34,511 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-19 23:02:34,511 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-19 23:02:34,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:02:34 BoogieIcfgContainer [2020-07-19 23:02:34,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:02:34,520 INFO L168 Benchmark]: Toolchain (without parser) took 15266.35 ms. Allocated memory was 138.9 MB in the beginning and 401.6 MB in the end (delta: 262.7 MB). Free memory was 104.1 MB in the beginning and 184.1 MB in the end (delta: -80.1 MB). Peak memory consumption was 182.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:34,520 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-19 23:02:34,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.69 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 94.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:34,522 INFO L168 Benchmark]: Boogie Preprocessor took 39.56 ms. Allocated memory is still 138.9 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:34,523 INFO L168 Benchmark]: RCFGBuilder took 370.12 ms. Allocated memory was 138.9 MB in the beginning and 204.5 MB in the end (delta: 65.5 MB). Free memory was 92.8 MB in the beginning and 171.9 MB in the end (delta: -79.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:34,524 INFO L168 Benchmark]: TraceAbstraction took 14530.16 ms. Allocated memory was 204.5 MB in the beginning and 401.6 MB in the end (delta: 197.1 MB). Free memory was 171.2 MB in the beginning and 184.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 184.2 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:34,527 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.69 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 94.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.56 ms. Allocated memory is still 138.9 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 370.12 ms. Allocated memory was 138.9 MB in the beginning and 204.5 MB in the end (delta: 65.5 MB). Free memory was 92.8 MB in the beginning and 171.9 MB in the end (delta: -79.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14530.16 ms. Allocated memory was 204.5 MB in the beginning and 401.6 MB in the end (delta: 197.1 MB). Free memory was 171.2 MB in the beginning and 184.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 184.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.7s, OverallIterations: 11, TraceHistogramMax: 35, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 254 SDtfs, 403 SDslu, 1169 SDs, 0 SdLazy, 2596 SolverSat, 614 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1670 GetRequests, 1388 SyntacticMatches, 3 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 85 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 188 PreInvPairs, 236 NumberOfFragments, 45 HoareAnnotationTreeSize, 188 FomulaSimplifications, 933 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3004 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 2184 NumberOfCodeBlocks, 2136 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 2163 ConstructedInterpolants, 0 QuantifiedInterpolants, 659159 SizeOfPredicates, 64 NumberOfNonLiveVariables, 2362 ConjunctsInSsa, 193 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 12926/18256 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...