/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 DAGSIZE --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 19:17:31,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:17:31,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:17:31,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:17:31,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:17:31,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:17:31,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:17:31,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:17:31,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:17:31,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:17:31,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:17:31,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:17:31,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:17:31,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:17:31,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:17:31,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:17:31,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:17:31,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:17:31,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:17:31,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:17:31,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:17:31,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:17:31,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:17:31,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:17:31,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:17:31,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:17:31,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:17:31,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:17:31,192 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 19:17:31,215 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:17:31,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:17:31,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:17:31,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:17:31,217 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:17:31,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:17:31,217 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:17:31,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:17:31,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:17:31,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:17:31,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:17:31,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:17:31,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:17:31,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:17:31,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:17:31,220 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:17:31,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:17:31,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:17:31,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:17:31,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:17:31,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:17:31,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:17:31,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:17:31,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:17:31,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:17:31,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:17:31,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:31,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:17:31,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:17:31,223 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 -> DAGSIZE 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 19:17:31,483 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:17:31,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:17:31,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:17:31,501 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:17:31,501 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:17:31,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 19:17:31,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d875dd1/601e6890949f4828adc32d89d1c800ca/FLAG50583677a [2020-07-21 19:17:32,040 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:17:32,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 19:17:32,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d875dd1/601e6890949f4828adc32d89d1c800ca/FLAG50583677a [2020-07-21 19:17:32,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d875dd1/601e6890949f4828adc32d89d1c800ca [2020-07-21 19:17:32,468 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:17:32,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:17:32,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:17:32,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:17:32,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:17:32,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a350d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32, skipping insertion in model container [2020-07-21 19:17:32,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:17:32,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:17:32,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:17:32,667 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:17:32,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:17:32,698 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:17:32,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32 WrapperNode [2020-07-21 19:17:32,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:17:32,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:17:32,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:17:32,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:17:32,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (1/1) ... [2020-07-21 19:17:32,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:17:32,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:17:32,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:17:32,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:17:32,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (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 19:17:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:17:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:17:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-21 19:17:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:17:32,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:17:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:17:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-21 19:17:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:17:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:17:32,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:17:33,048 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:17:33,049 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:17:33,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:17:33 BoogieIcfgContainer [2020-07-21 19:17:33,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:17:33,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:17:33,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:17:33,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:17:33,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:17:32" (1/3) ... [2020-07-21 19:17:33,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571f1ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:17:33, skipping insertion in model container [2020-07-21 19:17:33,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:17:32" (2/3) ... [2020-07-21 19:17:33,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571f1ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:17:33, skipping insertion in model container [2020-07-21 19:17:33,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:17:33" (3/3) ... [2020-07-21 19:17:33,061 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-21 19:17:33,071 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:17:33,078 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:17:33,095 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:17:33,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:17:33,124 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:17:33,124 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:17:33,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:17:33,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:17:33,124 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:17:33,125 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:17:33,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:17:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 19:17:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 19:17:33,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:33,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:33,158 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-07-21 19:17:33,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:33,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559647495] [2020-07-21 19:17:33,187 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 19:17:33,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:17:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:33,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:17:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:33,355 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:33,360 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:33,382 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:33,385 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:33,387 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:33,406 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 19:17:33,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:17:33,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559647495] [2020-07-21 19:17:33,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:17:33,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 19:17:33,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904464886] [2020-07-21 19:17:33,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 19:17:33,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:33,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 19:17:33,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:17:33,431 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-21 19:17:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:33,615 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 19:17:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:17:33,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 19:17:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:33,628 INFO L225 Difference]: With dead ends: 40 [2020-07-21 19:17:33,629 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 19:17:33,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:17:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 19:17:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 19:17:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:17:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 19:17:33,682 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-21 19:17:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:33,682 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 19:17:33,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 19:17:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 19:17:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 19:17:33,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:33,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:33,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:33,900 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-07-21 19:17:33,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:33,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316237335] [2020-07-21 19:17:33,902 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 19:17:33,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:33,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 19:17:33,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:33,976 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 19:17:33,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:17:33,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316237335] [2020-07-21 19:17:33,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:17:33,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 19:17:33,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428592382] [2020-07-21 19:17:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 19:17:33,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 19:17:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:17:33,981 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 19:17:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:34,053 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 19:17:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:17:34,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 19:17:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:34,055 INFO L225 Difference]: With dead ends: 30 [2020-07-21 19:17:34,056 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 19:17:34,057 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 19:17:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 19:17:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 19:17:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:17:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 19:17:34,073 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-07-21 19:17:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:34,074 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 19:17:34,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 19:17:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 19:17:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 19:17:34,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:34,076 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 19:17:34,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:34,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-07-21 19:17:34,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:34,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932497272] [2020-07-21 19:17:34,281 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 19:17:34,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:34,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:17:34,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:34,372 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,374 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,389 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,391 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,395 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,405 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 19:17:34,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:17:34,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932497272] [2020-07-21 19:17:34,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:17:34,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 19:17:34,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764266615] [2020-07-21 19:17:34,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 19:17:34,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 19:17:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:17:34,408 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 19:17:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:34,533 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-07-21 19:17:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:17:34,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 19:17:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:34,535 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:17:34,536 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 19:17:34,536 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 19:17:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 19:17:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 19:17:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 19:17:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-07-21 19:17:34,544 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-07-21 19:17:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:34,544 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-07-21 19:17:34,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 19:17:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-07-21 19:17:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 19:17:34,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:34,546 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 19:17:34,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:34,747 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-07-21 19:17:34,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:34,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838130564] [2020-07-21 19:17:34,748 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 19:17:34,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:34,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:17:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:34,820 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,822 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,855 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,856 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 19:17:34,861 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 19:17:34,866 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 19:17:34,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:17:34,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838130564] [2020-07-21 19:17:34,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:17:34,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 19:17:34,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835052749] [2020-07-21 19:17:34,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 19:17:34,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 19:17:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:17:34,871 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-07-21 19:17:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:35,013 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 19:17:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:17:35,016 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-21 19:17:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:35,019 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:17:35,019 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 19:17:35,020 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 19:17:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 19:17:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 19:17:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:17:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 19:17:35,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-07-21 19:17:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:35,030 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 19:17:35,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 19:17:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 19:17:35,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 19:17:35,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:35,034 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 19:17:35,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:35,241 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-07-21 19:17:35,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:35,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042262319] [2020-07-21 19:17:35,242 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 19:17:35,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:35,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:35,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:17:35,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:35,318 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 19:17:35,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:17:35,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042262319] [2020-07-21 19:17:35,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:17:35,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 19:17:35,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440744960] [2020-07-21 19:17:35,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 19:17:35,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:35,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 19:17:35,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:17:35,320 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-07-21 19:17:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:35,374 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 19:17:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:17:35,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 19:17:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:35,377 INFO L225 Difference]: With dead ends: 31 [2020-07-21 19:17:35,377 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 19:17:35,378 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 19:17:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 19:17:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-21 19:17:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 19:17:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 19:17:35,384 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-07-21 19:17:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:35,384 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 19:17:35,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 19:17:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 19:17:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 19:17:35,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:35,386 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 19:17:35,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:35,600 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-07-21 19:17:35,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:35,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123533929] [2020-07-21 19:17:35,603 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 19:17:35,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:35,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:17:35,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:35,674 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 19:17:35,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:17:35,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123533929] [2020-07-21 19:17:35,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:17:35,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 19:17:35,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399702799] [2020-07-21 19:17:35,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 19:17:35,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 19:17:35,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:17:35,676 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-07-21 19:17:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:35,725 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-21 19:17:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:17:35,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 19:17:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:35,726 INFO L225 Difference]: With dead ends: 34 [2020-07-21 19:17:35,727 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:17:35,727 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 19:17:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:17:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:17:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:17:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-21 19:17:35,734 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-21 19:17:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:35,734 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-21 19:17:35,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 19:17:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-21 19:17:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 19:17:35,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:35,736 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 19:17:35,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:35,937 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-07-21 19:17:35,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:35,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079190962] [2020-07-21 19:17:35,940 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) [2020-07-21 19:17:35,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:35,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:35,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 19:17:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:36,017 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 19:17:36,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:17:36,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079190962] [2020-07-21 19:17:36,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:17:36,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 19:17:36,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147961950] [2020-07-21 19:17:36,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 19:17:36,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 19:17:36,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:17:36,020 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-07-21 19:17:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:36,084 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 19:17:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:17:36,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-21 19:17:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:36,085 INFO L225 Difference]: With dead ends: 30 [2020-07-21 19:17:36,085 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:17:36,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:17:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:17:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:17:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:17:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:17:36,087 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-07-21 19:17:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:36,088 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:17:36,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 19:17:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:17:36,088 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:17:36,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:36,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:17:36,437 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:17:36,437 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:17:36,437 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-07-21 19:17:36,437 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-07-21 19:17:36,438 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 19:17:36,438 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 19:17:36,438 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-07-21 19:17:36,438 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 19:17:36,438 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-07-21 19:17:36,438 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 19:17:36,438 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 19:17:36,438 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 19:17:36,439 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:17:36,439 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:17:36,439 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:17:36,439 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:17:36,439 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 19:17:36,439 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-07-21 19:17:36,439 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-07-21 19:17:36,439 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-07-21 19:17:36,439 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 19:17:36,440 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-21 19:17:36,440 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (< 0 main_~m~0) [2020-07-21 19:17:36,440 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-07-21 19:17:36,440 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 19:17:36,440 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 19:17:36,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:17:36 BoogieIcfgContainer [2020-07-21 19:17:36,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:17:36,449 INFO L168 Benchmark]: Toolchain (without parser) took 3978.03 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 103.3 MB in the beginning and 94.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2020-07-21 19:17:36,449 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 19:17:36,450 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.12 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:17:36,452 INFO L168 Benchmark]: Boogie Preprocessor took 98.01 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 180.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 19:17:36,453 INFO L168 Benchmark]: RCFGBuilder took 254.79 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 167.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:17:36,454 INFO L168 Benchmark]: TraceAbstraction took 3392.15 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 166.6 MB in the beginning and 94.1 MB in the end (delta: 72.5 MB). Peak memory consumption was 105.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:17:36,458 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.12 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 98.01 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 180.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.79 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 167.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3392.15 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 166.6 MB in the beginning and 94.1 MB in the end (delta: 72.5 MB). Peak memory consumption was 105.5 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: 3.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 88 SDslu, 517 SDs, 0 SdLazy, 291 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s 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, 38 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s 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...