/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/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:53:26,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:53:26,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:53:26,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 21:53:26,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:53:26,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:53:26,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:53:26,972 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 21:53:27,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:53:27,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:53:27,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:53:27,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:53:27,010 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:53:27,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:53:27,010 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:53:27,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:53:27,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:53:27,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:53:27,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:53:27,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:53:27,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:53:27,015 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:53:27,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:53:27,016 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:53:27,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:53:27,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:53:27,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:53:27,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:53:27,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:53:27,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:53:27,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:53:27,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:53:27,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:53:27,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:53:27,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:53:27,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:53:27,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:53:27,018 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 21:53:27,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:53:27,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:53:27,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:53:27,323 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:53:27,324 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:53:27,324 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2020-07-20 21:53:27,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f57f366/fed4da27e9504ad795b7be869266f396/FLAGa1c83e451 [2020-07-20 21:53:27,816 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:53:27,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c [2020-07-20 21:53:27,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f57f366/fed4da27e9504ad795b7be869266f396/FLAGa1c83e451 [2020-07-20 21:53:28,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f57f366/fed4da27e9504ad795b7be869266f396 [2020-07-20 21:53:28,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:53:28,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:53:28,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:53:28,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:53:28,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:53:28,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164c7927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28, skipping insertion in model container [2020-07-20 21:53:28,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:53:28,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:53:28,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:53:28,439 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:53:28,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:53:28,468 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:53:28,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28 WrapperNode [2020-07-20 21:53:28,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:53:28,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:53:28,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:53:28,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:53:28,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (1/1) ... [2020-07-20 21:53:28,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:53:28,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:53:28,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:53:28,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:53:28,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (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 21:53:28,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:53:28,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:53:28,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:53:28,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:53:28,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:53:28,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:53:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:53:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:53:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:53:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:53:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:53:28,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:53:28,837 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:53:28,838 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:53:28,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:53:28 BoogieIcfgContainer [2020-07-20 21:53:28,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:53:28,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:53:28,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:53:28,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:53:28,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:53:28" (1/3) ... [2020-07-20 21:53:28,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c3bc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:53:28, skipping insertion in model container [2020-07-20 21:53:28,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:53:28" (2/3) ... [2020-07-20 21:53:28,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c3bc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:53:28, skipping insertion in model container [2020-07-20 21:53:28,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:53:28" (3/3) ... [2020-07-20 21:53:28,848 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-2.c [2020-07-20 21:53:28,858 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:53:28,863 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:53:28,875 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:53:28,897 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:53:28,897 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:53:28,897 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:53:28,898 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:53:28,898 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:53:28,898 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:53:28,898 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:53:28,898 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:53:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-20 21:53:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:53:28,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:53:28,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:53:28,919 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:53:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:53:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-07-20 21:53:28,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:53:28,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432953798] [2020-07-20 21:53:28,933 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 21:53:29,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:53:29,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:53:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:53:29,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:53:29,124 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-20 21:53:29,130 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:53:29,139 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:53:29,139 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:53:29,140 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-07-20 21:53:29,176 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:53:29,192 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 21:53:29,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:53:29,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432953798] [2020-07-20 21:53:29,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:53:29,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:53:29,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089497824] [2020-07-20 21:53:29,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:53:29,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:53:29,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:53:29,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:53:29,218 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2020-07-20 21:53:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:53:29,354 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-07-20 21:53:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:53:29,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-20 21:53:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:53:29,366 INFO L225 Difference]: With dead ends: 31 [2020-07-20 21:53:29,367 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 21:53:29,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:53:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 21:53:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 21:53:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 21:53:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-07-20 21:53:29,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-07-20 21:53:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:53:29,405 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-07-20 21:53:29,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:53:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-07-20 21:53:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:53:29,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:53:29,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:53:29,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:53:29,622 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:53:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:53:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-07-20 21:53:29,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:53:29,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591068631] [2020-07-20 21:53:29,625 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 21:53:29,680 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:53:29,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:53:29,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:53:29,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:53:29,711 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 21:53:29,712 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:53:29,716 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:53:29,717 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:53:29,717 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 21:53:29,729 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:53:29,732 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:53:29,818 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 21:53:29,821 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:53:29,834 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 21:53:29,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:53:29,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591068631] [2020-07-20 21:53:29,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:53:29,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:53:29,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746686466] [2020-07-20 21:53:29,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:53:29,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:53:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:53:29,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:53:29,838 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 5 states. [2020-07-20 21:53:30,899 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 21:53:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:53:30,929 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2020-07-20 21:53:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:53:30,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:53:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:53:30,930 INFO L225 Difference]: With dead ends: 14 [2020-07-20 21:53:30,930 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:53:30,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:53:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:53:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:53:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:53:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:53:30,933 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-07-20 21:53:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:53:30,933 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:53:30,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:53:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:53:30,934 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:53:31,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:53:31,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:53:31,190 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:53:31,190 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:53:31,191 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:53:31,191 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:53:31,191 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:53:31,191 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:53:31,192 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:53:31,192 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2020-07-20 21:53:31,192 INFO L264 CegarLoopResult]: At program point L21(lines 11 28) the Hoare annotation is: false [2020-07-20 21:53:31,194 INFO L268 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2020-07-20 21:53:31,195 INFO L268 CegarLoopResult]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2020-07-20 21:53:31,195 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2020-07-20 21:53:31,195 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2020-07-20 21:53:31,196 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 28) the Hoare annotation is: true [2020-07-20 21:53:31,196 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-20 21:53:31,196 INFO L268 CegarLoopResult]: For program point L20-2(lines 20 22) no Hoare annotation was computed. [2020-07-20 21:53:31,196 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-07-20 21:53:31,196 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-07-20 21:53:31,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:53:31 BoogieIcfgContainer [2020-07-20 21:53:31,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:53:31,212 INFO L168 Benchmark]: Toolchain (without parser) took 2978.55 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 104.1 MB in the beginning and 97.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:31,215 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 21:53:31,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.60 ms. Allocated memory is still 146.3 MB. Free memory was 103.9 MB in the beginning and 94.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:31,217 INFO L168 Benchmark]: Boogie Preprocessor took 111.50 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 94.0 MB in the beginning and 180.8 MB in the end (delta: -86.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:31,219 INFO L168 Benchmark]: RCFGBuilder took 260.60 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 166.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:31,226 INFO L168 Benchmark]: TraceAbstraction took 2366.84 ms. Allocated memory is still 202.4 MB. Free memory was 165.4 MB in the beginning and 97.3 MB in the end (delta: 68.2 MB). Peak memory consumption was 68.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:53:31,237 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.60 ms. Allocated memory is still 146.3 MB. Free memory was 103.9 MB in the beginning and 94.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.50 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 94.0 MB in the beginning and 180.8 MB in the end (delta: -86.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 260.60 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 166.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2366.84 ms. Allocated memory is still 202.4 MB. Free memory was 165.4 MB in the beginning and 97.3 MB in the end (delta: 68.2 MB). Peak memory consumption was 68.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: 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: 11]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 19 SDslu, 61 SDs, 0 SdLazy, 44 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 5 NumberOfFragments, 5 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 26 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 24 ConstructedInterpolants, 1 QuantifiedInterpolants, 1116 SizeOfPredicates, 11 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...