/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:27:45,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:27:45,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:27:45,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:27:45,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:27:45,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:27:45,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:27:45,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:27:45,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:27:45,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:27:45,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:27:45,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:27:45,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:27:45,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:27:45,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:27:45,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:27:45,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:27:45,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:27:45,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:27:45,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:27:45,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:27:45,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:27:45,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:27:45,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:27:45,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:27:45,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:27:45,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:27:45,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:27:45,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:27:45,352 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:27:45,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:27:45,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:27:45,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:27:45,355 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:27:45,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:27:45,355 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:27:45,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:27:45,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:27:45,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:27:45,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:27:45,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:27:45,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:27:45,356 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:27:45,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:27:45,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:27:45,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:27:45,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:27:45,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:27:45,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:27:45,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:27:45,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:27:45,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:27:45,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:27:45,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:27:45,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:27:45,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:45,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:27:45,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:27:45,360 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 -> 4 [2020-07-20 22:27:45,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:27:45,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:27:45,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:27:45,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:27:45,742 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:27:45,742 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-07-20 22:27:45,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80294eecc/da8d087b73dd4f85b4421f02751d0269/FLAG918e8a496 [2020-07-20 22:27:46,355 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:27:46,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-07-20 22:27:46,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80294eecc/da8d087b73dd4f85b4421f02751d0269/FLAG918e8a496 [2020-07-20 22:27:46,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80294eecc/da8d087b73dd4f85b4421f02751d0269 [2020-07-20 22:27:46,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:27:46,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:27:46,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:27:46,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:27:46,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:27:46,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:46,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dde870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46, skipping insertion in model container [2020-07-20 22:27:46,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:46,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:27:46,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:27:46,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:27:46,951 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:27:46,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:27:46,987 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:27:46,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46 WrapperNode [2020-07-20 22:27:46,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:27:46,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:27:46,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:27:46,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:27:47,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:47,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:47,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:47,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:47,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:47,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:47,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (1/1) ... [2020-07-20 22:27:47,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:27:47,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:27:47,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:27:47,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:27:47,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:27:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:27:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:27:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:27:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:27:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:27:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:27:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:27:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:27:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:27:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:27:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:27:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:27:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:27:47,424 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:27:47,425 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:27:47,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:27:47 BoogieIcfgContainer [2020-07-20 22:27:47,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:27:47,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:27:47,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:27:47,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:27:47,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:27:46" (1/3) ... [2020-07-20 22:27:47,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47af745c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:27:47, skipping insertion in model container [2020-07-20 22:27:47,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:46" (2/3) ... [2020-07-20 22:27:47,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47af745c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:27:47, skipping insertion in model container [2020-07-20 22:27:47,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:27:47" (3/3) ... [2020-07-20 22:27:47,443 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2020-07-20 22:27:47,457 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:27:47,467 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:27:47,487 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:27:47,520 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:27:47,521 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:27:47,521 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:27:47,521 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:27:47,522 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:27:47,522 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:27:47,522 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:27:47,523 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:27:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 22:27:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:27:47,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:47,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:47,559 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash 826978896, now seen corresponding path program 1 times [2020-07-20 22:27:47,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:47,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594602462] [2020-07-20 22:27:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:47,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:47,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:47,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:27:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:47,722 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:47,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:47,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594602462] [2020-07-20 22:27:47,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:47,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:27:47,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737825506] [2020-07-20 22:27:47,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:27:47,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:27:47,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:47,797 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-07-20 22:27:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:47,900 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 22:27:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:27:47,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 22:27:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:47,911 INFO L225 Difference]: With dead ends: 44 [2020-07-20 22:27:47,911 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 22:27:47,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:27:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 22:27:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 22:27:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 22:27:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-20 22:27:47,954 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2020-07-20 22:27:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:47,954 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-20 22:27:47,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:27:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-20 22:27:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:27:47,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:47,956 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:48,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:48,158 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:48,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1747164342, now seen corresponding path program 1 times [2020-07-20 22:27:48,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:48,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175673212] [2020-07-20 22:27:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:48,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:27:48,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:48,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:27:48,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:48,239 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:48,242 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:48,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:48,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175673212] [2020-07-20 22:27:48,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:48,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:27:48,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61036917] [2020-07-20 22:27:48,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:27:48,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:48,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:27:48,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:27:48,273 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2020-07-20 22:27:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:48,336 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 22:27:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:27:48,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 22:27:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:48,340 INFO L225 Difference]: With dead ends: 31 [2020-07-20 22:27:48,340 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 22:27:48,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:27:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 22:27:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-07-20 22:27:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:27:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-20 22:27:48,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2020-07-20 22:27:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:48,355 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-20 22:27:48,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:27:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-20 22:27:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 22:27:48,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:48,357 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:48,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:48,573 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash -94267114, now seen corresponding path program 1 times [2020-07-20 22:27:48,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:48,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506693253] [2020-07-20 22:27:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 22:27:48,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:48,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:27:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:48,688 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:48,692 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 22:27:48,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:27:48,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:27:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 22:27:48,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506693253] [2020-07-20 22:27:48,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:27:48,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 22:27:48,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825133082] [2020-07-20 22:27:48,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:27:48,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:27:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:27:48,833 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-07-20 22:27:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:48,960 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-20 22:27:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:27:48,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 22:27:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:48,962 INFO L225 Difference]: With dead ends: 39 [2020-07-20 22:27:48,962 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 22:27:48,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:27:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 22:27:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-07-20 22:27:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 22:27:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-20 22:27:48,972 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2020-07-20 22:27:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:48,973 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-20 22:27:48,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:27:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-20 22:27:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 22:27:48,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:48,977 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:49,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:49,178 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:49,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2069363338, now seen corresponding path program 2 times [2020-07-20 22:27:49,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:49,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172922221] [2020-07-20 22:27:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 22:27:49,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:49,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:49,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:27:49,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:49,247 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-20 22:27:49,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:27:49,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:27:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-20 22:27:49,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172922221] [2020-07-20 22:27:49,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:27:49,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-20 22:27:49,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58573634] [2020-07-20 22:27:49,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:27:49,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:27:49,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:27:49,382 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2020-07-20 22:27:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:49,457 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-07-20 22:27:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:27:49,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-07-20 22:27:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:49,462 INFO L225 Difference]: With dead ends: 36 [2020-07-20 22:27:49,462 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:27:49,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:27:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:27:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:27:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:27:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:27:49,466 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-07-20 22:27:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:49,469 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:27:49,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:27:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:27:49,470 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:27:49,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:49,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:27:49,830 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:27:49,830 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:27:49,830 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:27:49,830 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:27:49,831 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:27:49,831 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:27:49,831 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:27:49,831 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 22:27:49,831 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:27:49,831 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:27:49,832 INFO L271 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2020-07-20 22:27:49,832 INFO L268 CegarLoopResult]: For program point L31(lines 27 32) no Hoare annotation was computed. [2020-07-20 22:27:49,833 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0) (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (< 0 main_~MAXPATHLEN~0)) [2020-07-20 22:27:49,833 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 34) the Hoare annotation is: true [2020-07-20 22:27:49,834 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0) (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (< 0 main_~MAXPATHLEN~0)) [2020-07-20 22:27:49,834 INFO L264 CegarLoopResult]: At program point L27-2(lines 27 32) the Hoare annotation is: (and (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0) (< 0 main_~MAXPATHLEN~0)) [2020-07-20 22:27:49,834 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 34) no Hoare annotation was computed. [2020-07-20 22:27:49,834 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-20 22:27:49,834 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-20 22:27:49,835 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 34) no Hoare annotation was computed. [2020-07-20 22:27:49,835 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 22:27:49,835 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:27:49,835 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 22:27:49,835 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 22:27:49,835 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:27:49,836 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 22:27:49,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:27:49 BoogieIcfgContainer [2020-07-20 22:27:49,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:27:49,864 INFO L168 Benchmark]: Toolchain (without parser) took 3116.45 ms. Allocated memory was 137.9 MB in the beginning and 234.9 MB in the end (delta: 97.0 MB). Free memory was 102.2 MB in the beginning and 162.5 MB in the end (delta: -60.3 MB). Peak memory consumption was 36.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:27:49,866 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 22:27:49,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.27 ms. Allocated memory is still 137.9 MB. Free memory was 101.8 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:27:49,878 INFO L168 Benchmark]: Boogie Preprocessor took 121.79 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 181.8 MB in the end (delta: -89.4 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:27:49,880 INFO L168 Benchmark]: RCFGBuilder took 321.11 ms. Allocated memory is still 202.4 MB. Free memory was 181.8 MB in the beginning and 168.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:27:49,883 INFO L168 Benchmark]: TraceAbstraction took 2424.49 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 167.8 MB in the beginning and 162.5 MB in the end (delta: 5.3 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:27:49,895 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.27 ms. Allocated memory is still 137.9 MB. Free memory was 101.8 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.79 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 181.8 MB in the end (delta: -89.4 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.11 ms. Allocated memory is still 202.4 MB. Free memory was 181.8 MB in the beginning and 168.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2424.49 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 167.8 MB in the beginning and 162.5 MB in the end (delta: 5.3 MB). Peak memory consumption was 37.8 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (glob2_pathlim_off <= MAXPATHLEN && 0 <= glob2_p_off) && 0 < MAXPATHLEN - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 31 SDslu, 235 SDs, 0 SdLazy, 140 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 16 PreInvPairs, 27 NumberOfFragments, 42 HoareAnnotationTreeSize, 16 FomulaSimplifications, 93 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 99 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 163 ConstructedInterpolants, 0 QuantifiedInterpolants, 9769 SizeOfPredicates, 19 NumberOfNonLiveVariables, 205 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 150/164 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...