/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/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:35:37,915 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 20:35:37,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:35:37,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:35:37,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:35:37,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:35:37,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:35:37,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:35:37,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:35:37,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:35:37,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:35:37,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:35:37,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:35:37,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:35:37,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:35:37,983 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 20:35:38,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:35:38,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:35:38,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:35:38,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:35:38,008 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:35:38,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:35:38,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:35:38,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:35:38,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:35:38,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:35:38,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:35:38,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:35:38,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:35:38,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:35:38,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:35:38,011 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:35:38,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:35:38,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:35:38,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:35:38,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:35:38,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:35:38,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:35:38,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:35:38,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:35:38,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:35:38,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:35:38,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:38,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:35:38,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:35:38,013 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 20:35:38,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:35:38,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:35:38,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:35:38,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:35:38,318 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:35:38,319 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-07-21 20:35:38,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c22a800/5d154a66b9f74aea8fcbb6979442966a/FLAG7a3be8e92 [2020-07-21 20:35:38,974 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:35:38,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-07-21 20:35:38,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c22a800/5d154a66b9f74aea8fcbb6979442966a/FLAG7a3be8e92 [2020-07-21 20:35:39,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c22a800/5d154a66b9f74aea8fcbb6979442966a [2020-07-21 20:35:39,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:35:39,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:35:39,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:35:39,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:35:39,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:35:39,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5853e384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39, skipping insertion in model container [2020-07-21 20:35:39,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:35:39,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:35:39,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:35:39,595 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:35:39,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:35:39,635 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:35:39,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39 WrapperNode [2020-07-21 20:35:39,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:35:39,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:35:39,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:35:39,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:35:39,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (1/1) ... [2020-07-21 20:35:39,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:35:39,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:35:39,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:35:39,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:35:39,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (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 20:35:39,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:35:39,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:35:39,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:35:39,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:35:39,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:35:39,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:35:39,855 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:35:39,855 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:35:39,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:35:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:35:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:35:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:35:39,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:35:40,070 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:35:40,071 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:35:40,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:35:40 BoogieIcfgContainer [2020-07-21 20:35:40,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:35:40,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:35:40,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:35:40,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:35:40,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:35:39" (1/3) ... [2020-07-21 20:35:40,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3d7c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:35:40, skipping insertion in model container [2020-07-21 20:35:40,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:39" (2/3) ... [2020-07-21 20:35:40,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3d7c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:35:40, skipping insertion in model container [2020-07-21 20:35:40,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:35:40" (3/3) ... [2020-07-21 20:35:40,088 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-07-21 20:35:40,106 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:35:40,121 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:35:40,142 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:35:40,184 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:35:40,185 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:35:40,188 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:35:40,189 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:35:40,190 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:35:40,190 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:35:40,190 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:35:40,191 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:35:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 20:35:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:35:40,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:40,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:40,266 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:40,274 INFO L82 PathProgramCache]: Analyzing trace with hash 508025261, now seen corresponding path program 1 times [2020-07-21 20:35:40,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:40,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923375587] [2020-07-21 20:35:40,283 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 20:35:40,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:35:40,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:40,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:35:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:40,439 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:35:40,486 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 20:35:40,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:35:40,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923375587] [2020-07-21 20:35:40,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:35:40,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:35:40,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405361573] [2020-07-21 20:35:40,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:35:40,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:40,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:35:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:35:40,519 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-21 20:35:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:40,624 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-07-21 20:35:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:35:40,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 20:35:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:40,637 INFO L225 Difference]: With dead ends: 46 [2020-07-21 20:35:40,638 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 20:35:40,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:35:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 20:35:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-07-21 20:35:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 20:35:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 20:35:40,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2020-07-21 20:35:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:40,702 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 20:35:40,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:35:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 20:35:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 20:35:40,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:40,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:40,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:40,918 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:40,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash -133512762, now seen corresponding path program 1 times [2020-07-21 20:35:40,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:40,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638896719] [2020-07-21 20:35:40,920 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 20:35:40,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:35:40,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:35:40,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:40,982 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:35:41,023 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 20:35:41,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:35:41,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:35:41,079 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 20:35:41,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638896719] [2020-07-21 20:35:41,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:35:41,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-21 20:35:41,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335825625] [2020-07-21 20:35:41,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:35:41,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:35:41,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:35:41,086 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-07-21 20:35:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:41,167 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 20:35:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:35:41,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 20:35:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:41,172 INFO L225 Difference]: With dead ends: 30 [2020-07-21 20:35:41,172 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 20:35:41,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:35:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 20:35:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-07-21 20:35:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 20:35:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 20:35:41,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 20:35:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:41,182 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 20:35:41,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:35:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 20:35:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:35:41,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:41,184 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:41,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:41,399 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1022031800, now seen corresponding path program 1 times [2020-07-21 20:35:41,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:41,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543586710] [2020-07-21 20:35:41,401 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 20:35:41,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:35:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:41,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:35:41,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:41,477 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:35:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:35:41,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:35:41,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543586710] [2020-07-21 20:35:41,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:35:41,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:35:41,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290230155] [2020-07-21 20:35:41,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:35:41,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:41,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:35:41,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:35:41,510 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-07-21 20:35:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:41,617 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-21 20:35:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:35:41,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 20:35:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:41,622 INFO L225 Difference]: With dead ends: 31 [2020-07-21 20:35:41,622 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 20:35:41,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:35:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 20:35:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-07-21 20:35:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 20:35:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-21 20:35:41,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-07-21 20:35:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:41,642 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-21 20:35:41,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:35:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-21 20:35:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:35:41,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:41,643 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:41,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:41,861 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:41,862 INFO L82 PathProgramCache]: Analyzing trace with hash 996292415, now seen corresponding path program 1 times [2020-07-21 20:35:41,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:41,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608998790] [2020-07-21 20:35:41,864 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 20:35:41,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:35:41,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:41,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:35:41,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:41,942 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:35:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:35:41,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:35:41,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608998790] [2020-07-21 20:35:41,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:35:41,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:35:41,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473872047] [2020-07-21 20:35:41,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:35:41,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:41,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:35:41,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:35:41,971 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-07-21 20:35:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:42,060 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-07-21 20:35:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:35:42,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-21 20:35:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:42,062 INFO L225 Difference]: With dead ends: 28 [2020-07-21 20:35:42,062 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 20:35:42,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:35:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 20:35:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 20:35:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 20:35:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-21 20:35:42,069 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 18 [2020-07-21 20:35:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:42,069 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-21 20:35:42,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:35:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-21 20:35:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:35:42,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:42,071 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:42,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:42,285 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1254457853, now seen corresponding path program 1 times [2020-07-21 20:35:42,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:42,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317445545] [2020-07-21 20:35:42,286 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 20:35:42,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:35:42,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:35:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:42,355 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:35:42,358 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:35:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:35:42,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:35:42,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:35:42,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:35:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:35:42,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317445545] [2020-07-21 20:35:42,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:35:42,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 20:35:42,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436430216] [2020-07-21 20:35:42,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:35:42,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:42,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:35:42,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:35:42,462 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-07-21 20:35:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:42,533 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-21 20:35:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:35:42,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-21 20:35:42,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:42,534 INFO L225 Difference]: With dead ends: 19 [2020-07-21 20:35:42,534 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:35:42,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 20:35:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:35:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:35:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:35:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:35:42,536 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-07-21 20:35:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:42,537 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:35:42,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:35:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:35:42,537 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:35:42,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:42,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:35:43,021 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 20:35:43,021 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:35:43,021 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:35:43,022 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:35:43,022 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:35:43,022 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:35:43,022 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:35:43,022 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 20:35:43,022 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:35:43,023 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:35:43,023 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-07-21 20:35:43,023 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-07-21 20:35:43,023 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-21 20:35:43,023 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) (<= main_~n~0 0) .cse0 .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-21 20:35:43,024 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 20:35:43,024 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2020-07-21 20:35:43,024 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) .cse0 (<= main_~m~0 0) .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-21 20:35:43,024 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) (<= main_~n~0 0) .cse0 .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-21 20:35:43,025 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-07-21 20:35:43,025 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 20:35:43,025 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 20:35:43,025 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 20:35:43,025 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 20:35:43,025 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 20:35:43,026 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 20:35:43,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:35:43 BoogieIcfgContainer [2020-07-21 20:35:43,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:35:43,051 INFO L168 Benchmark]: Toolchain (without parser) took 3697.99 ms. Allocated memory was 144.7 MB in the beginning and 235.4 MB in the end (delta: 90.7 MB). Free memory was 101.6 MB in the beginning and 154.6 MB in the end (delta: -53.1 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,053 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.08 ms. Allocated memory is still 144.7 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,055 INFO L168 Benchmark]: Boogie Preprocessor took 38.95 ms. Allocated memory is still 144.7 MB. Free memory was 91.8 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,056 INFO L168 Benchmark]: RCFGBuilder took 401.18 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 90.2 MB in the beginning and 170.0 MB in the end (delta: -79.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,057 INFO L168 Benchmark]: TraceAbstraction took 2968.75 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 169.4 MB in the beginning and 154.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,061 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.08 ms. Allocated memory is still 144.7 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.95 ms. Allocated memory is still 144.7 MB. Free memory was 91.8 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 401.18 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 90.2 MB in the beginning and 170.0 MB in the end (delta: -79.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2968.75 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 169.4 MB in the beginning and 154.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((x <= 0 && 0 <= x) && m <= 0) && 0 <= m) || ((m + 1 <= n && 0 <= x) && 0 <= m) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 37 SDslu, 244 SDs, 0 SdLazy, 129 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, 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, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 83 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 74 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 3748 SizeOfPredicates, 16 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/13 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...