/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/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:13:39,159 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:13:39,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:13:39,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:13:39,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:13:39,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:13:39,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:13:39,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:13:39,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:13:39,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:13:39,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:13:39,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:13:39,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:13:39,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:13:39,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:13:39,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:13:39,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:13:39,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:13:39,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:13:39,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:13:39,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:13:39,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:13:39,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:13:39,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:13:39,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:13:39,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:13:39,239 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 01:13:39,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:13:39,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:13:39,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:13:39,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:13:39,263 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:13:39,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:13:39,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:13:39,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:13:39,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:13:39,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:13:39,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:13:39,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:13:39,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:13:39,265 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:13:39,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:13:39,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:13:39,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:13:39,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:13:39,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:13:39,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:13:39,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:13:39,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:13:39,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:13:39,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:13:39,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:13:39,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:13:39,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:13:39,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:13:39,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:13:39,269 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 01:13:39,690 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:13:39,708 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:13:39,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:13:39,717 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:13:39,718 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:13:39,719 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-07-21 01:13:39,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fccc8df/54af2f0ce6d849869bb97ab6611314aa/FLAG1d2889774 [2020-07-21 01:13:40,541 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:13:40,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-07-21 01:13:40,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fccc8df/54af2f0ce6d849869bb97ab6611314aa/FLAG1d2889774 [2020-07-21 01:13:40,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fccc8df/54af2f0ce6d849869bb97ab6611314aa [2020-07-21 01:13:40,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:13:40,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:13:40,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:13:40,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:13:40,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:13:40,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:13:40" (1/1) ... [2020-07-21 01:13:40,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282c0bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:40, skipping insertion in model container [2020-07-21 01:13:40,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:13:40" (1/1) ... [2020-07-21 01:13:40,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:13:40,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:13:41,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:13:41,214 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:13:41,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:13:41,261 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:13:41,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41 WrapperNode [2020-07-21 01:13:41,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:13:41,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:13:41,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:13:41,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:13:41,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (1/1) ... [2020-07-21 01:13:41,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (1/1) ... [2020-07-21 01:13:41,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (1/1) ... [2020-07-21 01:13:41,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (1/1) ... [2020-07-21 01:13:41,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (1/1) ... [2020-07-21 01:13:41,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (1/1) ... [2020-07-21 01:13:41,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (1/1) ... [2020-07-21 01:13:41,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:13:41,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:13:41,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:13:41,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:13:41,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (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 01:13:41,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:13:41,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:13:41,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:13:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:13:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:13:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:13:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:13:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:13:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:13:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:13:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:13:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:13:41,917 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:13:41,918 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 01:13:41,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:13:41 BoogieIcfgContainer [2020-07-21 01:13:41,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:13:41,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:13:41,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:13:41,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:13:41,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:13:40" (1/3) ... [2020-07-21 01:13:41,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eda4e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:13:41, skipping insertion in model container [2020-07-21 01:13:41,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:13:41" (2/3) ... [2020-07-21 01:13:41,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eda4e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:13:41, skipping insertion in model container [2020-07-21 01:13:41,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:13:41" (3/3) ... [2020-07-21 01:13:41,980 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-07-21 01:13:41,999 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:13:42,038 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:13:42,076 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:13:42,113 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:13:42,114 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:13:42,114 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:13:42,114 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:13:42,114 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:13:42,114 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:13:42,114 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:13:42,114 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:13:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-21 01:13:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:13:42,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:13:42,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:13:42,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:13:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:13:42,167 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-07-21 01:13:42,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:13:42,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881442325] [2020-07-21 01:13:42,189 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 01:13:42,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:13:42,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:13:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:13:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:13:42,449 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 01:13:42,458 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:13:42,473 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:13:42,474 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:13:42,474 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-07-21 01:13:42,537 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:13:42,559 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 01:13:42,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:13:42,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881442325] [2020-07-21 01:13:42,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:13:42,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:13:42,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71160723] [2020-07-21 01:13:42,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:13:42,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:13:42,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:13:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:13:42,606 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2020-07-21 01:13:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:13:42,975 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-07-21 01:13:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:13:42,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 01:13:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:13:43,023 INFO L225 Difference]: With dead ends: 31 [2020-07-21 01:13:43,024 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 01:13:43,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:13:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 01:13:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 01:13:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 01:13:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-07-21 01:13:43,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-07-21 01:13:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:13:43,119 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-07-21 01:13:43,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:13:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-07-21 01:13:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:13:43,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:13:43,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:13:43,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:13:43,337 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:13:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:13:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-07-21 01:13:43,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:13:43,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954138958] [2020-07-21 01:13:43,341 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 01:13:43,418 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:13:43,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:13:43,419 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:13:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:13:43,439 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:13:43,493 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:13:43,493 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:13:43,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:13:43,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:13:43 BoogieIcfgContainer [2020-07-21 01:13:43,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:13:43,758 INFO L168 Benchmark]: Toolchain (without parser) took 2893.87 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 98.7 MB in the beginning and 111.5 MB in the end (delta: -12.8 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:13:43,760 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 01:13:43,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.61 ms. Allocated memory is still 134.7 MB. Free memory was 98.3 MB in the beginning and 88.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:13:43,762 INFO L168 Benchmark]: Boogie Preprocessor took 188.99 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 88.5 MB in the beginning and 177.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:13:43,764 INFO L168 Benchmark]: RCFGBuilder took 494.58 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 163.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:13:43,765 INFO L168 Benchmark]: TraceAbstraction took 1799.59 ms. Allocated memory is still 199.8 MB. Free memory was 163.3 MB in the beginning and 111.5 MB in the end (delta: 51.8 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:13:43,773 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 396.61 ms. Allocated memory is still 134.7 MB. Free memory was 98.3 MB in the beginning and 88.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 188.99 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 88.5 MB in the beginning and 177.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 494.58 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 163.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1799.59 ms. Allocated memory is still 199.8 MB. Free memory was 163.3 MB in the beginning and 111.5 MB in the end (delta: 51.8 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] union dummy d1, d2; [L14] int n = __VERIFIER_nondet_int(); [L15] EXPR n ? &d1 : &d2 VAL [d1={3:0}, d2={2:0}, n=0, n ? &d1 : &d2={2:0}] [L15] union dummy *pd = n ? &d1 : &d2; [L16] d1.a = __VERIFIER_nondet_int() [L17] COND FALSE !(pd == &d1) [L20] pd->b = 0 VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L22] pd == &d2 && d1.a != 0 [L22] EXPR d1.a [L22] pd == &d2 && d1.a != 0 VAL [d1={3:0}, d1.a=-1, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L22] COND TRUE pd == &d2 && d1.a != 0 [L28] __VERIFIER_error() VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 18 SDslu, 39 SDs, 0 SdLazy, 36 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 26 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 300 SizeOfPredicates, 5 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...