/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:00:41,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:00:41,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:00:41,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:00:41,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:00:41,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:00:41,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:00:41,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:00:41,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:00:41,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:00:41,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:00:41,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:00:41,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:00:41,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:00:41,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:00:41,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:00:41,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:00:41,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:00:41,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:00:41,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:00:41,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:00:41,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:00:41,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:00:41,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:00:41,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:00:41,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:00:41,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:00:41,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:00:41,638 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 20:00:41,658 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:00:41,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:00:41,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:00:41,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:00:41,660 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:00:41,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:00:41,660 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:00:41,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:00:41,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:00:41,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:00:41,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:00:41,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:00:41,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:00:41,661 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:00:41,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:00:41,662 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:00:41,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:00:41,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:00:41,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:00:41,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:00:41,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:00:41,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:00:41,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:00:41,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:00:41,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:00:41,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:00:41,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:00:41,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:00:41,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:00:41,664 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 20:00:41,943 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:00:41,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:00:41,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:00:41,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:00:41,961 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:00:41,962 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-21 20:00:42,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61b51d9b/91459c54e4fe4975a9ab990327b14046/FLAGe8341b07a [2020-07-21 20:00:42,540 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:00:42,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-21 20:00:42,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61b51d9b/91459c54e4fe4975a9ab990327b14046/FLAGe8341b07a [2020-07-21 20:00:42,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61b51d9b/91459c54e4fe4975a9ab990327b14046 [2020-07-21 20:00:42,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:00:42,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:00:42,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:00:42,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:00:42,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:00:42,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:00:42" (1/1) ... [2020-07-21 20:00:42,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e8df94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:42, skipping insertion in model container [2020-07-21 20:00:42,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:00:42" (1/1) ... [2020-07-21 20:00:42,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:00:42,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:00:43,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:00:43,158 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:00:43,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:00:43,289 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:00:43,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43 WrapperNode [2020-07-21 20:00:43,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:00:43,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:00:43,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:00:43,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:00:43,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (1/1) ... [2020-07-21 20:00:43,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (1/1) ... [2020-07-21 20:00:43,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (1/1) ... [2020-07-21 20:00:43,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (1/1) ... [2020-07-21 20:00:43,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (1/1) ... [2020-07-21 20:00:43,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (1/1) ... [2020-07-21 20:00:43,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (1/1) ... [2020-07-21 20:00:43,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:00:43,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:00:43,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:00:43,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:00:43,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (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 20:00:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:00:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:00:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-21 20:00:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:00:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:00:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:00:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 20:00:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:00:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:00:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:00:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:00:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:00:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:00:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:00:43,699 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:00:43,699 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 20:00:43,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:00:43 BoogieIcfgContainer [2020-07-21 20:00:43,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:00:43,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:00:43,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:00:43,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:00:43,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:00:42" (1/3) ... [2020-07-21 20:00:43,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f30681f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:00:43, skipping insertion in model container [2020-07-21 20:00:43,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:00:43" (2/3) ... [2020-07-21 20:00:43,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f30681f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:00:43, skipping insertion in model container [2020-07-21 20:00:43,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:00:43" (3/3) ... [2020-07-21 20:00:43,711 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-21 20:00:43,720 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:00:43,726 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:00:43,739 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:00:43,758 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:00:43,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:00:43,758 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:00:43,759 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:00:43,759 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:00:43,759 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:00:43,759 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:00:43,759 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:00:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-21 20:00:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 20:00:43,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:00:43,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:00:43,786 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:00:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:00:43,792 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-07-21 20:00:43,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:00:43,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372900560] [2020-07-21 20:00:43,802 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 20:00:43,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:00:43,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:00:43,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 20:00:43,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:00:43,933 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 20:00:43,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:00:43,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372900560] [2020-07-21 20:00:43,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:00:43,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 20:00:43,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752195499] [2020-07-21 20:00:43,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 20:00:43,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:00:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 20:00:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:00:43,954 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-07-21 20:00:43,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:00:43,977 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-21 20:00:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 20:00:43,978 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-21 20:00:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:00:43,988 INFO L225 Difference]: With dead ends: 42 [2020-07-21 20:00:43,989 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 20:00:43,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:00:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 20:00:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 20:00:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 20:00:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 20:00:44,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-21 20:00:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:00:44,032 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 20:00:44,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 20:00:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 20:00:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:00:44,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:00:44,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:00:44,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:00:44,246 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:00:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:00:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-07-21 20:00:44,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:00:44,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111387997] [2020-07-21 20:00:44,249 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 20:00:44,359 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:00:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:00:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 20:00:44,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:00:44,404 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 20:00:44,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:00:44,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111387997] [2020-07-21 20:00:44,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:00:44,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:00:44,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062458458] [2020-07-21 20:00:44,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:00:44,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:00:44,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:00:44,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:00:44,408 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-07-21 20:00:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:00:44,430 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-21 20:00:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:00:44,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 20:00:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:00:44,432 INFO L225 Difference]: With dead ends: 34 [2020-07-21 20:00:44,432 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 20:00:44,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:00:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 20:00:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-21 20:00:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 20:00:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 20:00:44,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-21 20:00:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:00:44,440 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 20:00:44,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:00:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 20:00:44,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 20:00:44,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:00:44,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:00:44,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:00:44,656 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:00:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:00:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-07-21 20:00:44,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:00:44,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147919673] [2020-07-21 20:00:44,660 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 20:00:44,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:00:44,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:00:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:00:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:00:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:00:44,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:00:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:00:44,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147919673] [2020-07-21 20:00:44,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:00:44,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 20:00:44,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119224362] [2020-07-21 20:00:44,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:00:44,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:00:44,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:00:44,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:00:44,804 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-21 20:00:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:00:44,851 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-07-21 20:00:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:00:44,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-21 20:00:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:00:44,855 INFO L225 Difference]: With dead ends: 39 [2020-07-21 20:00:44,855 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 20:00:44,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:00:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 20:00:44,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 20:00:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 20:00:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 20:00:44,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-07-21 20:00:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:00:44,870 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 20:00:44,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:00:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 20:00:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 20:00:44,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:00:44,875 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:00:45,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:00:45,089 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:00:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:00:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 2 times [2020-07-21 20:00:45,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:00:45,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362993411] [2020-07-21 20:00:45,091 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 20:00:45,202 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:00:45,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:00:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:00:45,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:00:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:00:45,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:00:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:00:45,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362993411] [2020-07-21 20:00:45,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:00:45,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 20:00:45,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862141296] [2020-07-21 20:00:45,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 20:00:45,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:00:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 20:00:45,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:00:45,357 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-07-21 20:00:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:00:45,417 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-07-21 20:00:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 20:00:45,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-07-21 20:00:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:00:45,418 INFO L225 Difference]: With dead ends: 51 [2020-07-21 20:00:45,419 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:00:45,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:00:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:00:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 20:00:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 20:00:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 20:00:45,427 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 26 [2020-07-21 20:00:45,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:00:45,427 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 20:00:45,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 20:00:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 20:00:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 20:00:45,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:00:45,429 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:00:45,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:00:45,636 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:00:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:00:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 3 times [2020-07-21 20:00:45,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:00:45,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668662433] [2020-07-21 20:00:45,639 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 20:00:48,607 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:00:48,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:00:48,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 20:00:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:00:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:00:48,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:00:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:00:49,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668662433] [2020-07-21 20:00:49,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:00:49,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 20:00:49,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840689655] [2020-07-21 20:00:49,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 20:00:49,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:00:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 20:00:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-07-21 20:00:49,028 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2020-07-21 20:00:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:00:49,138 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-07-21 20:00:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 20:00:49,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-07-21 20:00:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:00:49,140 INFO L225 Difference]: With dead ends: 71 [2020-07-21 20:00:49,140 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 20:00:49,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-07-21 20:00:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 20:00:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 20:00:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 20:00:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-07-21 20:00:49,151 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 38 [2020-07-21 20:00:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:00:49,151 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-07-21 20:00:49,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 20:00:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-07-21 20:00:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 20:00:49,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:00:49,154 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:00:49,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:00:49,368 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:00:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:00:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 4 times [2020-07-21 20:00:49,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:00:49,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070020252] [2020-07-21 20:00:49,371 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 20:06:13,727 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:06:13,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:06:13,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:06:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:06:32,941 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:06:33,285 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:06:33,286 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:06:33,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:06:33,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:06:33 BoogieIcfgContainer [2020-07-21 20:06:33,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:06:33,552 INFO L168 Benchmark]: Toolchain (without parser) took 350626.01 ms. Allocated memory was 138.4 MB in the beginning and 247.5 MB in the end (delta: 109.1 MB). Free memory was 103.3 MB in the beginning and 212.7 MB in the end (delta: -109.4 MB). Peak memory consumption was 118.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:33,553 INFO L168 Benchmark]: CDTParser took 0.24 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: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 20:06:33,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.89 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 182.1 MB in the end (delta: -79.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:33,558 INFO L168 Benchmark]: Boogie Preprocessor took 37.53 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 179.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:33,559 INFO L168 Benchmark]: RCFGBuilder took 374.81 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 163.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:33,562 INFO L168 Benchmark]: TraceAbstraction took 349841.81 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 163.8 MB in the beginning and 212.7 MB in the end (delta: -48.9 MB). Peak memory consumption was 114.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:06:33,567 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 360.89 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 182.1 MB in the end (delta: -79.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.53 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 179.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.81 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 163.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 349841.81 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 163.8 MB in the beginning and 212.7 MB in the end (delta: -48.9 MB). Peak memory consumption was 114.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={83:0}, j=0] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=1] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=2] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=3] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=4] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=5] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=6] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=7] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=8] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=9] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=10] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=11] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=12] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=13] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=14] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=15] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=16] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=17] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=18] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=19] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={83:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={83:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) VAL [\read(*pa)=9, ad1={83:0}, ad2={83:0}, i=19, j=20, pa={83:72}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=19, ad1={83:0}] [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) VAL [ad1={83:0}, ad2={83:0}, check(ad1, i)=0, i=19, j=20, pa={83:72}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={83:0}, ad2={83:0}, i=19, j=20, pa={83:72}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 349.7s, OverallIterations: 6, TraceHistogramMax: 20, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 35 SDslu, 153 SDs, 0 SdLazy, 84 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=5, 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, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 327.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 177 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 195 ConstructedInterpolants, 0 QuantifiedInterpolants, 9525 SizeOfPredicates, 4 NumberOfNonLiveVariables, 506 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/234 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 incorrect! Received shutdown request...