/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_VARIABLES --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/recHanoi02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:28,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:28,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:28,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:28,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:28,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:28,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:28,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:28,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:28,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:28,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:28,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:28,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:28,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:28,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:28,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:28,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:28,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:28,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:28,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:28,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:28,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:28,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:28,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:28,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:28,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:45:28,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:45:28,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:45:28,205 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 15:45:28,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:28,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:28,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:28,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:28,242 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:28,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:28,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:28,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:28,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:28,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:28,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:28,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:28,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:28,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:28,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:28,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:28,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:28,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:28,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:28,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:28,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:28,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:28,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:28,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:28,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:28,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:28,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:28,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:28,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:28,247 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_VARIABLES 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 15:45:28,553 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:28,572 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:28,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:28,576 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:28,577 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:28,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-21 15:45:28,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8019e14/af9f7684ff85456b8387a9d2ef3775be/FLAG7b30b9a6c [2020-07-21 15:45:29,120 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:29,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-21 15:45:29,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8019e14/af9f7684ff85456b8387a9d2ef3775be/FLAG7b30b9a6c [2020-07-21 15:45:29,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8019e14/af9f7684ff85456b8387a9d2ef3775be [2020-07-21 15:45:29,496 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:29,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:29,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:29,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:29,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:29,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a926594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29, skipping insertion in model container [2020-07-21 15:45:29,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:29,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:29,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:29,713 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:29,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:29,745 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:29,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29 WrapperNode [2020-07-21 15:45:29,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:29,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:29,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:29,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:29,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (1/1) ... [2020-07-21 15:45:29,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:29,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:29,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:29,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:29,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (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 15:45:29,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:29,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:29,990 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-21 15:45:29,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:29,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:29,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:29,991 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-21 15:45:29,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:29,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:29,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:30,189 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:30,190 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:30,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:30 BoogieIcfgContainer [2020-07-21 15:45:30,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:30,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:30,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:30,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:30,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:29" (1/3) ... [2020-07-21 15:45:30,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce33b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:30, skipping insertion in model container [2020-07-21 15:45:30,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:29" (2/3) ... [2020-07-21 15:45:30,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce33b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:30, skipping insertion in model container [2020-07-21 15:45:30,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:30" (3/3) ... [2020-07-21 15:45:30,226 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2020-07-21 15:45:30,255 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:30,269 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:30,287 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:30,311 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:30,311 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:30,312 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:30,312 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:30,312 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:30,312 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:30,312 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:30,312 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 15:45:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:45:30,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:30,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:30,343 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-07-21 15:45:30,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:30,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218470816] [2020-07-21 15:45:30,359 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 15:45:30,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:30,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:30,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:30,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:30,508 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 15:45:30,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:30,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218470816] [2020-07-21 15:45:30,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:30,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:30,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769750391] [2020-07-21 15:45:30,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:30,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:30,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:30,534 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-21 15:45:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:30,587 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-21 15:45:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:30,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:45:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:30,599 INFO L225 Difference]: With dead ends: 33 [2020-07-21 15:45:30,600 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 15:45:30,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 15:45:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 15:45:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 15:45:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-21 15:45:30,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-07-21 15:45:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:30,649 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-21 15:45:30,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-21 15:45:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 15:45:30,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:30,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:30,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:30,868 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-07-21 15:45:30,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:30,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17635204] [2020-07-21 15:45:30,871 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 15:45:30,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:30,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:30,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 15:45:31,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:31,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17635204] [2020-07-21 15:45:31,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:31,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 15:45:31,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126856763] [2020-07-21 15:45:31,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 15:45:31,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:31,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 15:45:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:45:31,033 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2020-07-21 15:45:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:31,056 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-21 15:45:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:45:31,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-21 15:45:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:31,057 INFO L225 Difference]: With dead ends: 19 [2020-07-21 15:45:31,058 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:45:31,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:45:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:45:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:45:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:45:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:45:31,060 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-07-21 15:45:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:31,061 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:45:31,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 15:45:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:45:31,061 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:45:31,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:31,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:45:31,340 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:45:31,341 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:31,341 INFO L268 CegarLoopResult]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2020-07-21 15:45:31,342 INFO L271 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-07-21 15:45:31,343 INFO L268 CegarLoopResult]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2020-07-21 15:45:31,343 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-07-21 15:45:31,343 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-21 15:45:31,344 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 15:45:31,344 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:31,344 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:45:31,346 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:45:31,346 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:45:31,346 INFO L268 CegarLoopResult]: For program point L32(lines 32 36) no Hoare annotation was computed. [2020-07-21 15:45:31,346 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-07-21 15:45:31,348 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-07-21 15:45:31,348 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-07-21 15:45:31,348 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 37) the Hoare annotation is: true [2020-07-21 15:45:31,348 INFO L268 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-07-21 15:45:31,349 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 37) no Hoare annotation was computed. [2020-07-21 15:45:31,349 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 37) no Hoare annotation was computed. [2020-07-21 15:45:31,349 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-07-21 15:45:31,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:45:31 BoogieIcfgContainer [2020-07-21 15:45:31,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:45:31,375 INFO L168 Benchmark]: Toolchain (without parser) took 1872.78 ms. Allocated memory was 148.4 MB in the beginning and 208.1 MB in the end (delta: 59.8 MB). Free memory was 105.9 MB in the beginning and 129.7 MB in the end (delta: -23.7 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:31,377 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 148.4 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 15:45:31,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.43 ms. Allocated memory is still 148.4 MB. Free memory was 105.7 MB in the beginning and 96.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:31,383 INFO L168 Benchmark]: Boogie Preprocessor took 181.31 ms. Allocated memory was 148.4 MB in the beginning and 208.1 MB in the end (delta: 59.8 MB). Free memory was 96.4 MB in the beginning and 187.2 MB in the end (delta: -90.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:31,384 INFO L168 Benchmark]: RCFGBuilder took 269.15 ms. Allocated memory is still 208.1 MB. Free memory was 187.2 MB in the beginning and 175.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:31,386 INFO L168 Benchmark]: TraceAbstraction took 1165.49 ms. Allocated memory is still 208.1 MB. Free memory was 175.0 MB in the beginning and 129.7 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:31,397 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 148.4 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.43 ms. Allocated memory is still 148.4 MB. Free memory was 105.7 MB in the beginning and 96.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 181.31 ms. Allocated memory was 148.4 MB in the beginning and 208.1 MB in the end (delta: 59.8 MB). Free memory was 96.4 MB in the beginning and 187.2 MB in the end (delta: -90.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.15 ms. Allocated memory is still 208.1 MB. Free memory was 187.2 MB in the beginning and 175.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1165.49 ms. Allocated memory is still 208.1 MB. Free memory was 175.0 MB in the beginning and 129.7 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 2 SDslu, 137 SDs, 0 SdLazy, 20 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 2 QuantifiedInterpolants, 1394 SizeOfPredicates, 2 NumberOfNonLiveVariables, 84 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 4/4 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...