/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:57:57,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:57:57,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:57:57,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:57:57,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:57:57,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:57:57,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:57:57,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:57:57,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:57:57,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:57:57,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:57:57,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:57:57,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:57:57,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:57:57,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:57:57,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:57:57,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:57:57,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:57:57,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:57:57,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:57:57,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:57:57,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:57:57,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:57:57,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:57:57,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:57:57,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:57:57,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:57:57,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:57:57,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:57:57,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:57:57,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:57:57,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:57:57,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:57:57,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:57:57,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:57:57,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:57:57,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:57:57,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:57:57,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:57:57,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:57:57,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:57:57,143 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 [2020-07-21 12:57:57,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:57:57,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:57:57,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:57:57,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:57:57,172 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:57:57,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:57:57,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:57:57,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:57:57,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:57:57,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:57:57,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:57:57,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:57:57,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:57:57,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:57:57,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:57:57,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:57:57,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:57:57,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:57:57,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:57:57,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:57:57,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:57:57,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:57:57,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:57:57,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:57:57,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:57:57,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:57:57,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:57,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:57:57,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:57:57,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC 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 -> 2 [2020-07-21 12:57:57,587 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:57:57,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:57:57,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:57:57,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:57:57,608 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:57:57,609 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 12:57:57,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/855de987e/795b647c5d0b4530b67c3b8ee6ab44bc/FLAG1afa4f6ea [2020-07-21 12:57:58,259 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:57:58,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 12:57:58,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/855de987e/795b647c5d0b4530b67c3b8ee6ab44bc/FLAG1afa4f6ea [2020-07-21 12:57:58,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/855de987e/795b647c5d0b4530b67c3b8ee6ab44bc [2020-07-21 12:57:58,609 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:57:58,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:57:58,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:57:58,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:57:58,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:57:58,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5957ebad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58, skipping insertion in model container [2020-07-21 12:57:58,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:57:58,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:57:58,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:57:58,864 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:57:58,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:57:58,913 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:57:58,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58 WrapperNode [2020-07-21 12:57:58,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:57:58,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:57:58,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:57:58,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:57:58,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (1/1) ... [2020-07-21 12:57:58,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:57:58,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:57:58,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:57:58,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:57:58,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (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 [2020-07-21 12:57:59,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:57:59,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:57:59,112 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-21 12:57:59,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:57:59,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:57:59,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:57:59,113 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-21 12:57:59,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:57:59,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:57:59,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:57:59,415 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:57:59,417 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:57:59,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:57:59 BoogieIcfgContainer [2020-07-21 12:57:59,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:57:59,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:57:59,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:57:59,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:57:59,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:57:58" (1/3) ... [2020-07-21 12:57:59,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18353fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:57:59, skipping insertion in model container [2020-07-21 12:57:59,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:58" (2/3) ... [2020-07-21 12:57:59,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18353fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:57:59, skipping insertion in model container [2020-07-21 12:57:59,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:57:59" (3/3) ... [2020-07-21 12:57:59,437 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-21 12:57:59,455 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:57:59,467 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:57:59,499 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:57:59,565 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:57:59,565 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:57:59,565 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:57:59,566 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:57:59,566 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:57:59,566 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:57:59,567 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:57:59,567 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:57:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 12:57:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 12:57:59,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:59,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:59,596 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-07-21 12:57:59,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:59,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51914878] [2020-07-21 12:57:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:59,694 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:57:59,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:59,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:57:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:59,826 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:57:59,832 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:57:59,869 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:57:59,871 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:57:59,877 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:57:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:57:59,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:57:59,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51914878] [2020-07-21 12:57:59,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:57:59,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 12:57:59,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992374367] [2020-07-21 12:57:59,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:57:59,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:57:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:57:59,919 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-21 12:58:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:00,090 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 12:58:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:58:00,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 12:58:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:00,106 INFO L225 Difference]: With dead ends: 40 [2020-07-21 12:58:00,107 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 12:58:00,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:58:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 12:58:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 12:58:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 12:58:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 12:58:00,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-21 12:58:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:00,171 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 12:58:00,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:58:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 12:58:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 12:58:00,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:00,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:00,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:00,389 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-07-21 12:58:00,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:00,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793991887] [2020-07-21 12:58:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:00,435 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:58:00,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:58:00,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:58:00,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793991887] [2020-07-21 12:58:00,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:58:00,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 12:58:00,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354753506] [2020-07-21 12:58:00,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:58:00,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:00,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:58:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:58:00,487 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 12:58:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:00,550 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 12:58:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:58:00,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 12:58:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:00,553 INFO L225 Difference]: With dead ends: 30 [2020-07-21 12:58:00,553 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 12:58:00,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:58:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 12:58:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 12:58:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 12:58:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 12:58:00,565 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-07-21 12:58:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:00,565 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 12:58:00,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:58:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 12:58:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 12:58:00,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:00,568 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:00,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:00,783 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:00,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-07-21 12:58:00,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:00,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466706831] [2020-07-21 12:58:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:00,821 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:00,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:00,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:58:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:00,871 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:00,873 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:00,893 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:00,896 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:00,901 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:58:00,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:58:00,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466706831] [2020-07-21 12:58:00,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:58:00,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 12:58:00,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776638092] [2020-07-21 12:58:00,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:58:00,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:58:00,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:58:00,911 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 12:58:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:01,060 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-07-21 12:58:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:58:01,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 12:58:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:01,063 INFO L225 Difference]: With dead ends: 36 [2020-07-21 12:58:01,063 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:58:01,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:58:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:58:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 12:58:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 12:58:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-07-21 12:58:01,087 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-07-21 12:58:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:01,088 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-07-21 12:58:01,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:58:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-07-21 12:58:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 12:58:01,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:01,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:01,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:01,304 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:01,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-07-21 12:58:01,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:01,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420908691] [2020-07-21 12:58:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:01,346 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:01,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:58:01,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:01,405 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:01,407 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:01,424 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:01,426 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:58:01,430 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 12:58:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:58:01,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:58:01,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420908691] [2020-07-21 12:58:01,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:58:01,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:58:01,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823149926] [2020-07-21 12:58:01,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:58:01,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:01,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:58:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:58:01,440 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-07-21 12:58:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:01,574 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 12:58:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:58:01,575 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-21 12:58:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:01,576 INFO L225 Difference]: With dead ends: 36 [2020-07-21 12:58:01,576 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 12:58:01,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:58:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 12:58:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 12:58:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 12:58:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 12:58:01,585 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-07-21 12:58:01,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:01,585 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 12:58:01,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:58:01,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 12:58:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 12:58:01,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:01,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:01,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:01,801 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:01,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-07-21 12:58:01,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:01,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046867810] [2020-07-21 12:58:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:01,859 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:01,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:01,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:58:01,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:58:01,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:58:01,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046867810] [2020-07-21 12:58:01,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:58:01,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:58:01,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285069076] [2020-07-21 12:58:01,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:58:01,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:01,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:58:01,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:58:01,933 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-07-21 12:58:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:01,999 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 12:58:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:58:02,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 12:58:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:02,003 INFO L225 Difference]: With dead ends: 31 [2020-07-21 12:58:02,003 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 12:58:02,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:58:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 12:58:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-21 12:58:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 12:58:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 12:58:02,011 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-07-21 12:58:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:02,012 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 12:58:02,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:58:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 12:58:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 12:58:02,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:02,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:02,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:02,228 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:02,229 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-07-21 12:58:02,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:02,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019769413] [2020-07-21 12:58:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:02,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:02,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:02,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:58:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:58:02,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:58:02,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019769413] [2020-07-21 12:58:02,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:58:02,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:58:02,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404057044] [2020-07-21 12:58:02,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:58:02,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:58:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:58:02,314 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-07-21 12:58:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:02,388 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-21 12:58:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:58:02,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 12:58:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:02,391 INFO L225 Difference]: With dead ends: 34 [2020-07-21 12:58:02,392 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 12:58:02,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:58:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 12:58:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 12:58:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 12:58:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-21 12:58:02,402 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-21 12:58:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:02,402 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-21 12:58:02,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:58:02,402 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-21 12:58:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 12:58:02,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:02,404 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:02,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:02,618 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:02,619 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-07-21 12:58:02,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:02,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634776366] [2020-07-21 12:58:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:02,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:02,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 12:58:02,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 12:58:02,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:58:02,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634776366] [2020-07-21 12:58:02,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:58:02,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:58:02,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414021926] [2020-07-21 12:58:02,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:58:02,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:02,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:58:02,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:58:02,755 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-07-21 12:58:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:02,847 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 12:58:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:58:02,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-21 12:58:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:02,848 INFO L225 Difference]: With dead ends: 30 [2020-07-21 12:58:02,849 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:58:02,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:58:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:58:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:58:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:58:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:58:02,851 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-07-21 12:58:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:02,852 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:58:02,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:58:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:58:02,852 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:58:03,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:03,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:58:03,233 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:58:03,234 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:58:03,234 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-07-21 12:58:03,234 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-07-21 12:58:03,235 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= |gcd_#in~y2| gcd_~y2) (not (= gcd_~y1 gcd_~y2)) (< 0 gcd_~y1) (<= gcd_~y1 gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2020-07-21 12:58:03,235 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 12:58:03,235 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-07-21 12:58:03,236 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= |gcd_#in~y2| gcd_~y2) (< gcd_~y2 gcd_~y1) (< 0 gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2020-07-21 12:58:03,236 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-07-21 12:58:03,236 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 12:58:03,236 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 12:58:03,236 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 12:58:03,237 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:58:03,237 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:58:03,237 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:58:03,237 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:58:03,238 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 12:58:03,238 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-07-21 12:58:03,238 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-07-21 12:58:03,238 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-07-21 12:58:03,239 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 12:58:03,239 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-21 12:58:03,242 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (< 0 main_~n~0) (< 0 main_~m~0)) [2020-07-21 12:58:03,243 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-07-21 12:58:03,243 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 12:58:03,243 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 12:58:03,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:58:03 BoogieIcfgContainer [2020-07-21 12:58:03,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:58:03,265 INFO L168 Benchmark]: Toolchain (without parser) took 4650.66 ms. Allocated memory was 137.9 MB in the beginning and 233.3 MB in the end (delta: 95.4 MB). Free memory was 101.8 MB in the beginning and 97.7 MB in the end (delta: 4.1 MB). Peak memory consumption was 99.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:58:03,268 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 137.9 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 12:58:03,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.77 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 91.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:58:03,277 INFO L168 Benchmark]: Boogie Preprocessor took 30.02 ms. Allocated memory is still 137.9 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:58:03,278 INFO L168 Benchmark]: RCFGBuilder took 478.01 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 90.1 MB in the beginning and 168.1 MB in the end (delta: -78.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 12:58:03,280 INFO L168 Benchmark]: TraceAbstraction took 3833.06 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 167.5 MB in the beginning and 97.7 MB in the end (delta: 69.7 MB). Peak memory consumption was 101.7 MB. Max. memory is 7.1 GB. [2020-07-21 12:58:03,298 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 137.9 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.77 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 91.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.02 ms. Allocated memory is still 137.9 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 478.01 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 90.1 MB in the beginning and 168.1 MB in the end (delta: -78.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3833.06 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 167.5 MB in the beginning and 97.7 MB in the end (delta: 69.7 MB). Peak memory consumption was 101.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 93 SDslu, 486 SDs, 0 SdLazy, 270 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 42 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 157 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 6770 SizeOfPredicates, 20 NumberOfNonLiveVariables, 448 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...