/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/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:30:38,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:30:38,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:30:38,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 16:30:38,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:30:38,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:30:38,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:30:38,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:30:38,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:30:38,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:30:38,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:30:38,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:30:38,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:30:38,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:30:38,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:30:38,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:30:38,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:30:38,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:30:38,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:30:38,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:30:38,846 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 16:30:38,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:30:38,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:30:38,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:30:38,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:30:38,868 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:30:38,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:30:38,868 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:30:38,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:30:38,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:30:38,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:30:38,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:30:38,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:30:38,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:30:38,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:30:38,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:30:38,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:30:38,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:30:38,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:30:38,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:30:38,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:30:38,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:30:38,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:30:38,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:30:38,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:30:38,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:30:38,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:30:38,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:38,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:30:38,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:30:38,875 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 16:30:39,152 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:30:39,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:30:39,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:30:39,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:30:39,184 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:30:39,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-20 16:30:39,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263e1d2d0/5b7adba7a2b1409ca2aede3546989764/FLAG9c72c7844 [2020-07-20 16:30:39,741 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:30:39,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-20 16:30:39,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263e1d2d0/5b7adba7a2b1409ca2aede3546989764/FLAG9c72c7844 [2020-07-20 16:30:40,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263e1d2d0/5b7adba7a2b1409ca2aede3546989764 [2020-07-20 16:30:40,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:30:40,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:30:40,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:30:40,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:30:40,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:30:40,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b3732a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40, skipping insertion in model container [2020-07-20 16:30:40,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:30:40,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:30:40,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:30:40,351 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:30:40,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:30:40,376 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:30:40,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40 WrapperNode [2020-07-20 16:30:40,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:30:40,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:30:40,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:30:40,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:30:40,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (1/1) ... [2020-07-20 16:30:40,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:30:40,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:30:40,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:30:40,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:30:40,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (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 16:30:40,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:30:40,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:30:40,553 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-07-20 16:30:40,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:30:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:30:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:30:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-07-20 16:30:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:30:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:30:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:30:40,717 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:30:40,717 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:30:40,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:30:40 BoogieIcfgContainer [2020-07-20 16:30:40,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:30:40,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:30:40,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:30:40,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:30:40,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:30:40" (1/3) ... [2020-07-20 16:30:40,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8953e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:30:40, skipping insertion in model container [2020-07-20 16:30:40,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:40" (2/3) ... [2020-07-20 16:30:40,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8953e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:30:40, skipping insertion in model container [2020-07-20 16:30:40,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:30:40" (3/3) ... [2020-07-20 16:30:40,729 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-07-20 16:30:40,740 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:30:40,748 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:30:40,762 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:30:40,788 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:30:40,788 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:30:40,788 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:30:40,789 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:30:40,789 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:30:40,789 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:30:40,789 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:30:40,789 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:30:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 16:30:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 16:30:40,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:40,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:40,817 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1590359645, now seen corresponding path program 1 times [2020-07-20 16:30:40,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:40,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967734983] [2020-07-20 16:30:40,829 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 16:30:40,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:40,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:40,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 16:30:40,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:41,071 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 16:30:41,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:30:41,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967734983] [2020-07-20 16:30:41,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:30:41,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 16:30:41,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809878203] [2020-07-20 16:30:41,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:30:41,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:30:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:30:41,097 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-07-20 16:30:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:41,237 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-20 16:30:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:30:41,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-20 16:30:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:41,251 INFO L225 Difference]: With dead ends: 34 [2020-07-20 16:30:41,251 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 16:30:41,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:30:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 16:30:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 16:30:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 16:30:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-07-20 16:30:41,305 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-07-20 16:30:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:41,305 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-07-20 16:30:41,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:30:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-07-20 16:30:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 16:30:41,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:41,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:41,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:41,523 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2121223720, now seen corresponding path program 1 times [2020-07-20 16:30:41,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:41,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219400832] [2020-07-20 16:30:41,526 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 16:30:41,592 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:30:41,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 16:30:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 16:30:41,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:41,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:42,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:30:42,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219400832] [2020-07-20 16:30:42,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:42,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2020-07-20 16:30:42,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580346733] [2020-07-20 16:30:42,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 16:30:42,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:42,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 16:30:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-07-20 16:30:42,203 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 15 states. [2020-07-20 16:30:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:42,386 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-07-20 16:30:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:30:42,387 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-07-20 16:30:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:42,387 INFO L225 Difference]: With dead ends: 20 [2020-07-20 16:30:42,388 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:30:42,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:30:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:30:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:30:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:30:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:30:42,391 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-20 16:30:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:42,391 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:30:42,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 16:30:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:30:42,392 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:30:42,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:42,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:30:42,713 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:30:42,713 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:30:42,713 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:30:42,713 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:30:42,713 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:30:42,714 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:30:42,714 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-07-20 16:30:42,714 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-07-20 16:30:42,714 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 24 32) the Hoare annotation is: true [2020-07-20 16:30:42,714 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 32) no Hoare annotation was computed. [2020-07-20 16:30:42,715 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-20 16:30:42,715 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-20 16:30:42,715 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-07-20 16:30:42,715 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 32) no Hoare annotation was computed. [2020-07-20 16:30:42,716 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (and (<= |f91_#t~ret0| 101) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-20 16:30:42,716 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-07-20 16:30:42,716 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-07-20 16:30:42,716 INFO L271 CegarLoopResult]: At program point f91ENTRY(lines 15 21) the Hoare annotation is: true [2020-07-20 16:30:42,717 INFO L268 CegarLoopResult]: For program point f91FINAL(lines 15 21) no Hoare annotation was computed. [2020-07-20 16:30:42,725 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-20 16:30:42,725 INFO L268 CegarLoopResult]: For program point f91EXIT(lines 15 21) no Hoare annotation was computed. [2020-07-20 16:30:42,725 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-20 16:30:42,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:30:42 BoogieIcfgContainer [2020-07-20 16:30:42,734 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:30:42,738 INFO L168 Benchmark]: Toolchain (without parser) took 2605.10 ms. Allocated memory was 144.2 MB in the beginning and 233.3 MB in the end (delta: 89.1 MB). Free memory was 100.5 MB in the beginning and 148.1 MB in the end (delta: -47.6 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. [2020-07-20 16:30:42,739 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 144.2 MB. Free memory is still 118.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 16:30:42,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.45 ms. Allocated memory is still 144.2 MB. Free memory was 100.1 MB in the beginning and 90.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:30:42,743 INFO L168 Benchmark]: Boogie Preprocessor took 24.04 ms. Allocated memory is still 144.2 MB. Free memory was 90.9 MB in the beginning and 89.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:30:42,745 INFO L168 Benchmark]: RCFGBuilder took 318.92 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 89.7 MB in the beginning and 170.1 MB in the end (delta: -80.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:30:42,747 INFO L168 Benchmark]: TraceAbstraction took 2011.42 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 169.1 MB in the beginning and 148.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. [2020-07-20 16:30:42,757 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 144.2 MB. Free memory is still 118.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.45 ms. Allocated memory is still 144.2 MB. Free memory was 100.1 MB in the beginning and 90.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.04 ms. Allocated memory is still 144.2 MB. Free memory was 90.9 MB in the beginning and 89.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.92 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 89.7 MB in the beginning and 170.1 MB in the end (delta: -80.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2011.42 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 169.1 MB in the beginning and 148.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 30]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 20 SDslu, 113 SDs, 0 SdLazy, 146 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 23 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 38 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 5160 SizeOfPredicates, 9 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 17/24 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...