/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:19:34,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:19:34,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:19:34,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:19:34,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:19:34,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:19:34,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:19:34,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:19:34,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:19:34,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:19:34,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:19:34,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:19:34,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:19:34,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:19:34,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:19:34,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:19:34,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:19:34,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:19:34,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:19:34,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:19:34,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:19:34,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:19:34,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:19:34,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:19:34,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:19:34,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:19:34,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:19:34,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:19:34,214 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 [2020-07-20 14:19:34,230 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:19:34,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:19:34,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:19:34,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:19:34,232 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:19:34,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:19:34,232 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:19:34,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:19:34,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:19:34,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:19:34,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:19:34,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:19:34,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:19:34,234 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:19:34,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:19:34,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:19:34,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:19:34,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:19:34,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:19:34,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:19:34,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:19:34,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:19:34,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:19:34,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:19:34,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:19:34,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:19:34,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:34,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:19:34,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:19:34,237 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 -> 4 [2020-07-20 14:19:34,536 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:19:34,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:19:34,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:19:34,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:19:34,556 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:19:34,557 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-2.i [2020-07-20 14:19:34,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400e1c898/3f48232a0e5b467e8cfaf1c430928f99/FLAG14a01fe8f [2020-07-20 14:19:35,151 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:19:35,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-2.i [2020-07-20 14:19:35,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400e1c898/3f48232a0e5b467e8cfaf1c430928f99/FLAG14a01fe8f [2020-07-20 14:19:35,517 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400e1c898/3f48232a0e5b467e8cfaf1c430928f99 [2020-07-20 14:19:35,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:19:35,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:19:35,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:35,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:19:35,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:19:35,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57469803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35, skipping insertion in model container [2020-07-20 14:19:35,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:19:35,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:19:35,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:35,759 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:19:35,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:35,793 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:19:35,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35 WrapperNode [2020-07-20 14:19:35,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:35,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:19:35,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:19:35,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:19:35,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (1/1) ... [2020-07-20 14:19:35,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:19:35,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:19:35,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:19:35,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:19:35,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (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 [2020-07-20 14:19:35,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:19:35,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:19:35,992 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:19:35,992 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:19:35,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:19:35,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:19:35,992 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:19:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:19:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:19:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:19:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 14:19:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:19:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:19:35,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:19:36,177 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:19:36,178 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:19:36,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:36 BoogieIcfgContainer [2020-07-20 14:19:36,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:19:36,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:19:36,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:19:36,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:19:36,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:19:35" (1/3) ... [2020-07-20 14:19:36,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc89da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:36, skipping insertion in model container [2020-07-20 14:19:36,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:35" (2/3) ... [2020-07-20 14:19:36,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc89da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:36, skipping insertion in model container [2020-07-20 14:19:36,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:36" (3/3) ... [2020-07-20 14:19:36,200 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-2.i [2020-07-20 14:19:36,235 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:19:36,257 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:19:36,298 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:19:36,336 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:19:36,336 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:19:36,337 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:19:36,337 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:19:36,337 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:19:36,337 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:19:36,337 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:19:36,337 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:19:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 14:19:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:19:36,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:36,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:36,366 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:36,372 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-20 14:19:36,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:36,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99623] [2020-07-20 14:19:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:19:36,449 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:19:36,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:19:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:36,517 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:19:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:36,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:19:36,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99623] [2020-07-20 14:19:36,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:19:36,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:19:36,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51150537] [2020-07-20 14:19:36,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:19:36,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:36,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:19:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:19:36,587 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 14:19:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:36,677 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 14:19:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:19:36,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-20 14:19:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:36,690 INFO L225 Difference]: With dead ends: 40 [2020-07-20 14:19:36,690 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 14:19:36,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:19:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 14:19:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 14:19:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 14:19:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 14:19:36,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 14:19:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:36,737 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 14:19:36,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:19:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 14:19:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:19:36,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:36,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:36,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:36,949 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:36,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:36,950 INFO L82 PathProgramCache]: Analyzing trace with hash -161295409, now seen corresponding path program 1 times [2020-07-20 14:19:36,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:36,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044374419] [2020-07-20 14:19:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:19:36,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:19:36,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:19:36,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:37,016 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:19:37,018 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:19:37,020 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:19:37,022 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:19:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:37,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:19:37,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044374419] [2020-07-20 14:19:37,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:19:37,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:19:37,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339745652] [2020-07-20 14:19:37,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:19:37,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:19:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:19:37,049 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-07-20 14:19:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:37,077 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-07-20 14:19:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:19:37,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-07-20 14:19:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:37,079 INFO L225 Difference]: With dead ends: 13 [2020-07-20 14:19:37,079 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 14:19:37,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:19:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 14:19:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 14:19:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 14:19:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 14:19:37,082 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-07-20 14:19:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:37,082 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 14:19:37,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:19:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 14:19:37,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 14:19:37,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:37,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 14:19:37,381 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 14:19:37,381 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:19:37,382 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:19:37,382 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 14:19:37,382 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 14:19:37,382 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:19:37,383 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:19:37,383 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 14:19:37,383 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:19:37,383 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:19:37,383 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 25) the Hoare annotation is: true [2020-07-20 14:19:37,383 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 25) no Hoare annotation was computed. [2020-07-20 14:19:37,384 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-07-20 14:19:37,384 INFO L268 CegarLoopResult]: For program point L18(lines 18 22) no Hoare annotation was computed. [2020-07-20 14:19:37,384 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 14:19:37,384 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 21) the Hoare annotation is: (< 0 main_~y~0) [2020-07-20 14:19:37,385 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 22) the Hoare annotation is: (or (<= 100 main_~x~0) (<= main_~y~0 0)) [2020-07-20 14:19:37,385 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 25) no Hoare annotation was computed. [2020-07-20 14:19:37,385 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 14:19:37,385 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 14:19:37,385 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 14:19:37,385 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 14:19:37,386 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 14:19:37,386 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 14:19:37,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:19:37 BoogieIcfgContainer [2020-07-20 14:19:37,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:19:37,410 INFO L168 Benchmark]: Toolchain (without parser) took 1880.51 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 102.9 MB in the beginning and 120.2 MB in the end (delta: -17.4 MB). Peak memory consumption was 39.8 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:37,412 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 14:19:37,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.14 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:37,414 INFO L168 Benchmark]: Boogie Preprocessor took 120.61 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:37,415 INFO L168 Benchmark]: RCFGBuilder took 266.90 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 168.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:37,416 INFO L168 Benchmark]: TraceAbstraction took 1223.66 ms. Allocated memory is still 201.9 MB. Free memory was 167.6 MB in the beginning and 120.2 MB in the end (delta: 47.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:37,420 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.14 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.61 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 266.90 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 168.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1223.66 ms. Allocated memory is still 201.9 MB. Free memory was 167.6 MB in the beginning and 120.2 MB in the end (delta: 47.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 < y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 10 SDslu, 80 SDs, 0 SdLazy, 26 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 413 SizeOfPredicates, 4 NumberOfNonLiveVariables, 59 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...