/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:19:20,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:19:20,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:19:20,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:19:20,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:19:20,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:19:20,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:19:20,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:19:20,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:19:20,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:19:20,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:19:20,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:19:20,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:19:20,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:19:20,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:19:20,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:19:20,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:19:20,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:19:20,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:19:20,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:19:20,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:19:20,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:19:20,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:19:20,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:19:20,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:19:20,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:19:20,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:19:20,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:19:20,887 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 16:19:20,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:19:20,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:19:20,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:19:20,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:19:20,908 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:19:20,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:19:20,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:19:20,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:19:20,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:19:20,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:19:20,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:19:20,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:19:20,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:19:20,911 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:19:20,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:19:20,911 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:19:20,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:19:20,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:19:20,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:19:20,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:19:20,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:19:20,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:19:20,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:19:20,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:19:20,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:19:20,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:19:20,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:20,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:19:20,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:19:20,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:19:21,259 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:19:21,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:19:21,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:19:21,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:19:21,284 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:19:21,285 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-07-21 16:19:21,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5175558/d78ead664c8a4ea2b733cc1fea10d698/FLAGe876fc3c2 [2020-07-21 16:19:21,983 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:19:21,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-07-21 16:19:21,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5175558/d78ead664c8a4ea2b733cc1fea10d698/FLAGe876fc3c2 [2020-07-21 16:19:22,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5175558/d78ead664c8a4ea2b733cc1fea10d698 [2020-07-21 16:19:22,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:19:22,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:19:22,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:19:22,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:19:22,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:19:22,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f22401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22, skipping insertion in model container [2020-07-21 16:19:22,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:19:22,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:19:22,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:19:22,628 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:19:22,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:19:22,677 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:19:22,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22 WrapperNode [2020-07-21 16:19:22,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:19:22,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:19:22,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:19:22,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:19:22,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (1/1) ... [2020-07-21 16:19:22,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:19:22,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:19:22,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:19:22,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:19:22,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (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 16:19:22,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:19:22,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:19:22,961 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-07-21 16:19:22,961 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-21 16:19:22,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:19:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:19:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-07-21 16:19:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 16:19:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 16:19:22,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:19:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-21 16:19:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:19:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:19:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:19:22,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:19:22,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:19:22,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:19:23,433 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:19:23,434 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 16:19:23,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:19:23 BoogieIcfgContainer [2020-07-21 16:19:23,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:19:23,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:19:23,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:19:23,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:19:23,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:19:22" (1/3) ... [2020-07-21 16:19:23,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283bc6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:19:23, skipping insertion in model container [2020-07-21 16:19:23,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:22" (2/3) ... [2020-07-21 16:19:23,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283bc6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:19:23, skipping insertion in model container [2020-07-21 16:19:23,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:19:23" (3/3) ... [2020-07-21 16:19:23,454 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-07-21 16:19:23,476 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:19:23,493 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:19:23,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:19:23,548 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:19:23,549 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:19:23,549 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:19:23,549 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:19:23,549 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:19:23,549 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:19:23,549 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:19:23,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:19:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 16:19:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:19:23,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:19:23,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:19:23,588 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:19:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:19:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1199829752, now seen corresponding path program 1 times [2020-07-21 16:19:23,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:19:23,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008768082] [2020-07-21 16:19:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:19:23,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:19:23,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:19:23,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:19:23,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:19:23,947 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 16:19:23,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:19:23,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008768082] [2020-07-21 16:19:23,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:19:23,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:19:23,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974382115] [2020-07-21 16:19:23,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:19:23,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:19:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:19:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:19:23,983 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 16:19:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:19:24,083 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 16:19:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:19:24,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 16:19:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:19:24,102 INFO L225 Difference]: With dead ends: 34 [2020-07-21 16:19:24,103 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 16:19:24,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:19:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 16:19:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 16:19:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 16:19:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-07-21 16:19:24,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 14 [2020-07-21 16:19:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:19:24,170 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-07-21 16:19:24,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:19:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-07-21 16:19:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 16:19:24,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:19:24,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:19:24,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:24,388 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:19:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:19:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2114164890, now seen corresponding path program 1 times [2020-07-21 16:19:24,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:19:24,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942018846] [2020-07-21 16:19:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:19:24,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:19:24,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:19:24,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:19:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:19:24,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:19:24,983 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:19:24,984 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:19:25,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:25,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:19:25 BoogieIcfgContainer [2020-07-21 16:19:25,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:19:25,253 INFO L168 Benchmark]: Toolchain (without parser) took 2947.81 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 102.0 MB in the beginning and 106.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:25,254 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:19:25,256 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.80 ms. Allocated memory is still 145.2 MB. Free memory was 101.8 MB in the beginning and 91.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:25,257 INFO L168 Benchmark]: Boogie Preprocessor took 177.98 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 91.8 MB in the beginning and 181.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:25,258 INFO L168 Benchmark]: RCFGBuilder took 583.14 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 162.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:25,259 INFO L168 Benchmark]: TraceAbstraction took 1806.70 ms. Allocated memory is still 203.4 MB. Free memory was 161.6 MB in the beginning and 106.0 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:19:25,264 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 370.80 ms. Allocated memory is still 145.2 MB. Free memory was 101.8 MB in the beginning and 91.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 177.98 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 91.8 MB in the beginning and 181.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 583.14 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 162.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1806.70 ms. Allocated memory is still 203.4 MB. Free memory was 161.6 MB in the beginning and 106.0 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; [L22] int *p1, *p2; [L24] p1 = &a [L25] p2 = &b [L27] b = 1 [L28] a = 5 [L30] EXPR \read(a) [L30] a-- [L32] EXPR \read(a) VAL [\read(a)=4, a={3:0}, b={5:0}, p1={2:0}, p2={4:0}] [L32] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={2:0}, p2={4:0}] [L12] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={2:0}, p1={2:0}, p2={4:0}, p2={4:0}] [L13] CALL g(p1, p2) VAL [p1={2:0}, p2={4:0}] [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 VAL [p1={2:0}, p1={2:0}, p2={4:0}, p2={4:0}, pq={5:0}] [L13] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={2:0}, p1={2:0}, p2={4:0}, p2={4:0}] [L14] return 1; VAL [\old(a)=4, \result=1, a=4, p1={2:0}, p1={2:0}, p2={4:0}, p2={4:0}] [L32] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={3:0}, b={5:0}, f(a, &p1, &p2)=1, p1={2:0}, p2={4:0}] [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) VAL [\read(*p1)={5:0}, \read(*p1)=0, a={3:0}, b={5:0}, p1={2:0}, p2={4:0}] [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() VAL [a={3:0}, b={5:0}, p1={2:0}, p2={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 5 SDslu, 53 SDs, 0 SdLazy, 13 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0.4s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 299 SizeOfPredicates, 6 NumberOfNonLiveVariables, 87 ConjunctsInSsa, 8 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...