/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 BIGGEST_EQUIVALENCE_CLASS --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/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:42:07,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:42:07,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:42:07,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:42:07,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:42:07,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:42:07,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:42:07,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:42:07,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:42:07,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:42:07,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:42:07,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:42:07,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:42:07,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:42:07,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:42:07,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:42:07,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:42:07,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:42:07,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:42:07,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:42:07,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:42:07,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:42:07,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:42:07,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:42:07,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:42:07,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:42:07,174 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:42:07,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:42:07,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:42:07,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:42:07,177 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:42:07,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:42:07,178 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:42:07,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:42:07,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:42:07,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:42:07,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:42:07,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:42:07,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:42:07,180 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:42:07,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:42:07,180 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:42:07,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:42:07,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:42:07,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:42:07,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:42:07,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:42:07,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:42:07,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:42:07,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:42:07,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:42:07,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:42:07,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:42:07,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:42:07,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:42:07,184 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:42:07,586 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:42:07,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:42:07,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:42:07,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:42:07,625 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:42:07,627 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2020-07-21 22:42:07,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b727d6e81/b78fa67ccb3c4d50829349ebfaed2b1a/FLAGa550fe7f7 [2020-07-21 22:42:08,577 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:42:08,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2020-07-21 22:42:08,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b727d6e81/b78fa67ccb3c4d50829349ebfaed2b1a/FLAGa550fe7f7 [2020-07-21 22:42:08,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b727d6e81/b78fa67ccb3c4d50829349ebfaed2b1a [2020-07-21 22:42:08,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:42:08,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:42:08,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:42:08,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:42:08,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:42:08,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:42:08" (1/1) ... [2020-07-21 22:42:08,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9a9bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:08, skipping insertion in model container [2020-07-21 22:42:08,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:42:08" (1/1) ... [2020-07-21 22:42:08,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:42:08,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:42:09,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:42:09,149 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:42:09,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:42:09,205 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:42:09,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09 WrapperNode [2020-07-21 22:42:09,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:42:09,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:42:09,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:42:09,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:42:09,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (1/1) ... [2020-07-21 22:42:09,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (1/1) ... [2020-07-21 22:42:09,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (1/1) ... [2020-07-21 22:42:09,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (1/1) ... [2020-07-21 22:42:09,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (1/1) ... [2020-07-21 22:42:09,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (1/1) ... [2020-07-21 22:42:09,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (1/1) ... [2020-07-21 22:42:09,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:42:09,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:42:09,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:42:09,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:42:09,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:42:09,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:42:09,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:42:09,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:42:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:42:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:42:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:42:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 22:42:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:42:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:42:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:42:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:42:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:42:09,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:42:09,831 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:42:09,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:42:09 BoogieIcfgContainer [2020-07-21 22:42:09,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:42:09,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:42:09,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:42:09,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:42:09,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:42:08" (1/3) ... [2020-07-21 22:42:09,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34baccb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:42:09, skipping insertion in model container [2020-07-21 22:42:09,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:09" (2/3) ... [2020-07-21 22:42:09,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34baccb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:42:09, skipping insertion in model container [2020-07-21 22:42:09,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:42:09" (3/3) ... [2020-07-21 22:42:09,857 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-07-21 22:42:09,878 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:42:09,917 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:42:09,990 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:42:10,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:42:10,046 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:42:10,047 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:42:10,047 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:42:10,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:42:10,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:42:10,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:42:10,048 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:42:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-21 22:42:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:42:10,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:42:10,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:42:10,096 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:42:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:42:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-07-21 22:42:10,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:42:10,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470446237] [2020-07-21 22:42:10,123 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 [2020-07-21 22:42:10,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:42:10,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:42:10,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:42:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:42:10,364 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:42:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:42:10,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:42:10,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470446237] [2020-07-21 22:42:10,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:42:10,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:42:10,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328034104] [2020-07-21 22:42:10,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:42:10,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:42:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:42:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:42:10,436 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2020-07-21 22:42:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:42:10,587 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-07-21 22:42:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:42:10,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-21 22:42:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:42:10,608 INFO L225 Difference]: With dead ends: 29 [2020-07-21 22:42:10,609 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 22:42:10,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:42:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 22:42:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 22:42:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 22:42:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 22:42:10,684 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 13 [2020-07-21 22:42:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:42:10,685 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 22:42:10,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:42:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 22:42:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:42:10,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:42:10,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:42:10,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:42:10,889 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:42:10,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:42:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-07-21 22:42:10,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:42:10,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113320086] [2020-07-21 22:42:10,892 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 [2020-07-21 22:42:10,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:42:10,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:42:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:42:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:42:11,081 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 [2020-07-21 22:42:11,084 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:42:11,092 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:42:11,093 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:42:11,095 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-07-21 22:42:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:42:11,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:42:11,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113320086] [2020-07-21 22:42:11,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:42:11,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:42:11,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764614986] [2020-07-21 22:42:11,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:42:11,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:42:11,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:42:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:42:11,136 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-07-21 22:42:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:42:11,211 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2020-07-21 22:42:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:42:11,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:42:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:42:11,215 INFO L225 Difference]: With dead ends: 21 [2020-07-21 22:42:11,215 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 22:42:11,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:42:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 22:42:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 22:42:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 22:42:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-07-21 22:42:11,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-07-21 22:42:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:42:11,226 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-07-21 22:42:11,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:42:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-07-21 22:42:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:42:11,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:42:11,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:42:11,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:42:11,443 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:42:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:42:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1852956943, now seen corresponding path program 1 times [2020-07-21 22:42:11,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:42:11,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551784661] [2020-07-21 22:42:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:42:11,543 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:42:11,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:42:11,544 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:42:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:42:11,577 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:42:11,625 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:42:11,627 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:42:11,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:42:11,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:42:11 BoogieIcfgContainer [2020-07-21 22:42:11,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:42:11,913 INFO L168 Benchmark]: Toolchain (without parser) took 3080.24 ms. Allocated memory was 136.3 MB in the beginning and 202.4 MB in the end (delta: 66.1 MB). Free memory was 101.3 MB in the beginning and 105.1 MB in the end (delta: -3.7 MB). Peak memory consumption was 62.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:11,915 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:42:11,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.17 ms. Allocated memory is still 136.3 MB. Free memory was 100.9 MB in the beginning and 91.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:11,918 INFO L168 Benchmark]: Boogie Preprocessor took 198.40 ms. Allocated memory was 136.3 MB in the beginning and 202.4 MB in the end (delta: 66.1 MB). Free memory was 91.1 MB in the beginning and 180.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:11,919 INFO L168 Benchmark]: RCFGBuilder took 432.60 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 166.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:11,920 INFO L168 Benchmark]: TraceAbstraction took 2066.61 ms. Allocated memory is still 202.4 MB. Free memory was 166.0 MB in the beginning and 105.1 MB in the end (delta: 60.9 MB). Peak memory consumption was 60.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:42:11,925 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 371.17 ms. Allocated memory is still 136.3 MB. Free memory was 100.9 MB in the beginning and 91.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 198.40 ms. Allocated memory was 136.3 MB in the beginning and 202.4 MB in the end (delta: 66.1 MB). Free memory was 91.1 MB in the beginning and 180.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 432.60 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 166.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2066.61 ms. Allocated memory is still 202.4 MB. Free memory was 166.0 MB in the beginning and 105.1 MB in the end (delta: 60.9 MB). Peak memory consumption was 60.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] struct dummy d1, d2; [L13] int n = __VERIFIER_nondet_int(); [L14] EXPR n ? &d1 : &d2 VAL [d1={2:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}] [L14] struct dummy *pd = n ? &d1 : &d2; [L15] COND TRUE pd == &d2 [L16] pd->a = 0 VAL [d1={2:0}, d2={3:0}, n=0, pd={3:0}] [L20] pd == &d2 && d2.b != 0 [L20] EXPR d2.b [L20] pd == &d2 && d2.b != 0 VAL [d1={2:0}, d2={3:0}, d2.b=7, n=0, pd={3:0}, pd == &d2 && d2.b != 0=1] [L20] COND TRUE pd == &d2 && d2.b != 0 [L26] __VERIFIER_error() VAL [d1={2:0}, d2={3:0}, n=0, pd={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 11 SDslu, 46 SDs, 0 SdLazy, 33 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 504 SizeOfPredicates, 5 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 10 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 incorrect! Received shutdown request...