/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:56:19,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:56:19,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:56:19,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 17:56:19,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:56:19,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:56:19,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:56:19,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:56:19,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:56:19,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:56:19,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:56:19,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:56:19,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:56:19,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:56:19,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:56:19,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:56:19,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:56:19,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:56:19,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:56:19,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:56:19,998 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 17:56:20,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:56:20,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:56:20,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:56:20,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:56:20,025 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:56:20,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:56:20,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:56:20,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:56:20,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:56:20,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:56:20,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:56:20,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:56:20,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:56:20,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:56:20,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:56:20,027 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:56:20,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:56:20,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:56:20,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:56:20,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:56:20,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:56:20,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:56:20,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:56:20,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:56:20,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:56:20,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:56:20,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:20,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:56:20,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:56:20,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:56:20,377 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:56:20,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:56:20,402 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:56:20,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:56:20,410 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:56:20,411 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-07-20 17:56:20,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3038eaba5/f80c7cc66eb64cdd808253f79267f390/FLAG5f387b6d6 [2020-07-20 17:56:21,078 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:56:21,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-07-20 17:56:21,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3038eaba5/f80c7cc66eb64cdd808253f79267f390/FLAG5f387b6d6 [2020-07-20 17:56:21,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3038eaba5/f80c7cc66eb64cdd808253f79267f390 [2020-07-20 17:56:21,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:56:21,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:56:21,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:56:21,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:56:21,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:56:21,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@328fb091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21, skipping insertion in model container [2020-07-20 17:56:21,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:56:21,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:56:21,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:56:21,637 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:56:21,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:56:21,676 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:56:21,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21 WrapperNode [2020-07-20 17:56:21,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:56:21,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:56:21,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:56:21,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:56:21,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (1/1) ... [2020-07-20 17:56:21,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:56:21,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:56:21,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:56:21,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:56:21,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (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 17:56:21,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:56:21,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:56:21,901 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:56:21,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:56:21,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:56:21,901 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:56:21,901 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:56:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:56:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:56:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:56:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:56:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:56:22,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:56:22,131 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:56:22,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:22 BoogieIcfgContainer [2020-07-20 17:56:22,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:56:22,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:56:22,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:56:22,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:56:22,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:56:21" (1/3) ... [2020-07-20 17:56:22,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2704d89f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:22, skipping insertion in model container [2020-07-20 17:56:22,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:21" (2/3) ... [2020-07-20 17:56:22,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2704d89f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:22, skipping insertion in model container [2020-07-20 17:56:22,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:22" (3/3) ... [2020-07-20 17:56:22,148 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2020-07-20 17:56:22,164 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:56:22,175 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:56:22,203 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:56:22,248 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:56:22,249 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:56:22,249 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:56:22,249 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:56:22,250 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:56:22,250 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:56:22,250 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:56:22,250 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:56:22,279 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-07-20 17:56:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 17:56:22,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:56:22,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:56:22,292 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:56:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:56:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1330899215, now seen corresponding path program 1 times [2020-07-20 17:56:22,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:56:22,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844709075] [2020-07-20 17:56:22,312 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 17:56:22,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:56:22,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:56:22,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:56:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:56:22,516 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 17:56:22,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:56:22,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844709075] [2020-07-20 17:56:22,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:56:22,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:56:22,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843665634] [2020-07-20 17:56:22,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:56:22,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:56:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:56:22,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:56:22,544 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-07-20 17:56:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:56:22,593 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-20 17:56:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:56:22,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-20 17:56:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:56:22,609 INFO L225 Difference]: With dead ends: 26 [2020-07-20 17:56:22,610 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 17:56:22,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:56:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 17:56:22,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 17:56:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 17:56:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 17:56:22,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 17:56:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:56:22,666 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 17:56:22,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:56:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 17:56:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 17:56:22,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:56:22,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:56:22,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:22,882 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:56:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:56:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1691859760, now seen corresponding path program 1 times [2020-07-20 17:56:22,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:56:22,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681517306] [2020-07-20 17:56:22,885 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 17:56:22,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:56:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:56:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:56:22,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:56:22,980 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:56:22,986 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:56:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:56:23,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:56:23,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:56:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:56:23,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681517306] [2020-07-20 17:56:23,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:56:23,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 17:56:23,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823936220] [2020-07-20 17:56:23,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:56:23,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:56:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:56:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:56:23,102 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-07-20 17:56:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:56:23,211 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-07-20 17:56:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:56:23,212 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-20 17:56:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:56:23,212 INFO L225 Difference]: With dead ends: 15 [2020-07-20 17:56:23,213 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:56:23,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:56:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:56:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:56:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:56:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:56:23,216 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-07-20 17:56:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:56:23,217 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:56:23,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:56:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:56:23,217 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:56:23,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:56:23,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:56:23,516 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:56:23,517 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:56:23,517 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:56:23,517 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:56:23,518 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:56:23,518 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:56:23,520 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:56:23,520 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:56:23,520 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 17:56:23,521 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:56:23,522 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:56:23,525 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-07-20 17:56:23,525 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: true [2020-07-20 17:56:23,526 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-07-20 17:56:23,526 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-07-20 17:56:23,526 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-07-20 17:56:23,527 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-07-20 17:56:23,528 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-07-20 17:56:23,528 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-20 17:56:23,535 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (or (< 0 main_~main__y~0) (< main_~main__x~0 0)) [2020-07-20 17:56:23,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:56:23 BoogieIcfgContainer [2020-07-20 17:56:23,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:56:23,570 INFO L168 Benchmark]: Toolchain (without parser) took 2199.00 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 101.9 MB in the beginning and 122.2 MB in the end (delta: -20.2 MB). Peak memory consumption was 38.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:23,572 INFO L168 Benchmark]: CDTParser took 0.99 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:56:23,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.26 ms. Allocated memory is still 145.2 MB. Free memory was 101.5 MB in the beginning and 91.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:23,577 INFO L168 Benchmark]: Boogie Preprocessor took 35.00 ms. Allocated memory is still 145.2 MB. Free memory was 91.9 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:23,579 INFO L168 Benchmark]: RCFGBuilder took 421.61 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 90.5 MB in the beginning and 170.5 MB in the end (delta: -80.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:23,581 INFO L168 Benchmark]: TraceAbstraction took 1427.27 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 122.2 MB in the end (delta: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:56:23,595 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.26 ms. Allocated memory is still 145.2 MB. Free memory was 101.5 MB in the beginning and 91.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.00 ms. Allocated memory is still 145.2 MB. Free memory was 91.9 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.61 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 90.5 MB in the beginning and 170.5 MB in the end (delta: -80.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1427.27 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 122.2 MB in the end (delta: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: 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: 28]: Loop Invariant Derived loop invariant: 0 < main__y || main__x < 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 7 SDslu, 34 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 7 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 814 SizeOfPredicates, 6 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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...