/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/1_3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:17:35,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:17:35,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:17:35,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:17:35,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:17:35,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:17:35,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:17:35,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:17:35,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:17:35,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:17:35,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:17:35,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:17:35,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:17:35,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:17:35,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:17:35,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:17:35,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:17:35,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:17:35,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:17:35,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:17:35,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:17:35,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:17:35,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:17:35,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:17:35,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:17:35,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:17:35,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:17:35,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:17:35,724 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 16:17:35,753 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:17:35,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:17:35,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:17:35,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:17:35,756 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:17:35,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:17:35,757 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:17:35,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:17:35,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:17:35,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:17:35,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:17:35,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:17:35,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:17:35,760 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:17:35,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:17:35,761 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:17:35,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:17:35,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:17:35,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:17:35,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:17:35,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:17:35,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:17:35,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:17:35,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:17:35,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:17:35,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:17:35,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:35,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:17:35,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:17:35,764 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 16:17:36,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:17:36,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:17:36,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:17:36,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:17:36,125 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:17:36,125 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/1_3.i [2020-07-21 16:17:36,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798a8c0bf/152cc045fa5144deb5864417c7e16a44/FLAGa05741e36 [2020-07-21 16:17:36,594 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:17:36,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/1_3.i [2020-07-21 16:17:36,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798a8c0bf/152cc045fa5144deb5864417c7e16a44/FLAGa05741e36 [2020-07-21 16:17:37,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798a8c0bf/152cc045fa5144deb5864417c7e16a44 [2020-07-21 16:17:37,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:17:37,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:17:37,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:17:37,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:17:37,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:17:37,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42cb3f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37, skipping insertion in model container [2020-07-21 16:17:37,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:17:37,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:17:37,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:17:37,247 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:17:37,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:17:37,282 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:17:37,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37 WrapperNode [2020-07-21 16:17:37,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:17:37,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:17:37,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:17:37,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:17:37,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (1/1) ... [2020-07-21 16:17:37,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:17:37,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:17:37,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:17:37,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:17:37,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (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 16:17:37,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:17:37,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:17:37,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-21 16:17:37,533 INFO L138 BoogieDeclarations]: Found implementation of procedure getrr [2020-07-21 16:17:37,533 INFO L138 BoogieDeclarations]: Found implementation of procedure getPtr [2020-07-21 16:17:37,534 INFO L138 BoogieDeclarations]: Found implementation of procedure freePtr [2020-07-21 16:17:37,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:17:37,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:17:37,534 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-21 16:17:37,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:17:37,536 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:17:37,536 INFO L130 BoogieDeclarations]: Found specification of procedure getrr [2020-07-21 16:17:37,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:17:37,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:17:37,536 INFO L130 BoogieDeclarations]: Found specification of procedure getPtr [2020-07-21 16:17:37,537 INFO L130 BoogieDeclarations]: Found specification of procedure freePtr [2020-07-21 16:17:37,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:17:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:17:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:17:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:17:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:17:37,758 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:17:37,758 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 16:17:37,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:17:37 BoogieIcfgContainer [2020-07-21 16:17:37,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:17:37,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:17:37,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:17:37,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:17:37,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:17:37" (1/3) ... [2020-07-21 16:17:37,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba12be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:17:37, skipping insertion in model container [2020-07-21 16:17:37,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:17:37" (2/3) ... [2020-07-21 16:17:37,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba12be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:17:37, skipping insertion in model container [2020-07-21 16:17:37,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:17:37" (3/3) ... [2020-07-21 16:17:37,781 INFO L109 eAbstractionObserver]: Analyzing ICFG 1_3.i [2020-07-21 16:17:37,807 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:17:37,817 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:17:37,838 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:17:37,871 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:17:37,872 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:17:37,872 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:17:37,872 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:17:37,872 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:17:37,873 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:17:37,873 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:17:37,873 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:17:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 16:17:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:17:37,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:37,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:37,918 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:37,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1862665640, now seen corresponding path program 1 times [2020-07-21 16:17:37,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:37,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553759808] [2020-07-21 16:17:37,951 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 16:17:38,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:38,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:17:38,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:17:38,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:17:38,205 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 16:17:38,206 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:38,218 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:38,218 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:38,219 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 16:17:38,323 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-07-21 16:17:38,325 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:17:38,328 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:17:38,329 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:17:38,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 16:17:38,348 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 16:17:38,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:17:38,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553759808] [2020-07-21 16:17:38,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:17:38,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:17:38,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794525991] [2020-07-21 16:17:38,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:17:38,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:17:38,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:17:38,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:17:38,375 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 7 states. [2020-07-21 16:17:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:17:38,481 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-07-21 16:17:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:17:38,483 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-21 16:17:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:17:38,494 INFO L225 Difference]: With dead ends: 49 [2020-07-21 16:17:38,494 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 16:17:38,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:17:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 16:17:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 16:17:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 16:17:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 26 transitions. [2020-07-21 16:17:38,545 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 26 transitions. Word has length 20 [2020-07-21 16:17:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:17:38,546 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 26 transitions. [2020-07-21 16:17:38,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:17:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 26 transitions. [2020-07-21 16:17:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 16:17:38,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:17:38,548 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:17:38,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:38,764 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:17:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:17:38,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1146014323, now seen corresponding path program 1 times [2020-07-21 16:17:38,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:17:38,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790706404] [2020-07-21 16:17:38,767 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 16:17:38,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:17:38,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:17:38,833 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:17:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:17:38,851 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:17:38,876 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:17:38,876 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:17:39,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:17:39,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:17:39 BoogieIcfgContainer [2020-07-21 16:17:39,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:17:39,142 INFO L168 Benchmark]: Toolchain (without parser) took 2110.54 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 105.0 MB in the beginning and 111.4 MB in the end (delta: -6.3 MB). Peak memory consumption was 57.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:39,143 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 141.6 MB. Free memory was 123.3 MB in the beginning and 123.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:17:39,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.89 ms. Allocated memory is still 141.6 MB. Free memory was 104.6 MB in the beginning and 94.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:39,146 INFO L168 Benchmark]: Boogie Preprocessor took 153.40 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.9 MB in the beginning and 183.2 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:39,147 INFO L168 Benchmark]: RCFGBuilder took 327.11 ms. Allocated memory is still 205.0 MB. Free memory was 183.2 MB in the beginning and 168.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:39,147 INFO L168 Benchmark]: TraceAbstraction took 1374.29 ms. Allocated memory is still 205.0 MB. Free memory was 168.2 MB in the beginning and 111.4 MB in the end (delta: 56.9 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. [2020-07-21 16:17:39,153 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 141.6 MB. Free memory was 123.3 MB in the beginning and 123.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.89 ms. Allocated memory is still 141.6 MB. Free memory was 104.6 MB in the beginning and 94.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.40 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.9 MB in the beginning and 183.2 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.11 ms. Allocated memory is still 205.0 MB. Free memory was 183.2 MB in the beginning and 168.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1374.29 ms. Allocated memory is still 205.0 MB. Free memory was 168.2 MB in the beginning and 111.4 MB in the end (delta: 56.9 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L50] rr * ptr1 = 0; VAL [ptr1={0:0}] [L51] CALL, EXPR getPtr() [L37] CALL, EXPR getrr() [L30] rr * r = (rr *)malloc(sizeof *r); [L31] r -> state = 0 [L32] return r; VAL [\result={-1:0}, malloc(sizeof *r)={-1:0}, r={-1:0}] [L37] RET, EXPR getrr() VAL [getrr()={-1:0}] [L37] rr * r = getrr(); [L38] r -> state = 1 [L39] return r; VAL [\result={-1:0}, r={-1:0}] [L51] RET, EXPR getPtr() VAL [getPtr()={-1:0}, ptr1={0:0}] [L51] ptr1 = getPtr() [L52] CALL freePtr(ptr1) VAL [ptr={-1:0}] [L44] EXPR ptr -> state VAL [ptr={-1:0}, ptr={-1:0}, ptr -> state=1] [L44] (ptr -> state == 1) ? (0) : __blast_assert () VAL [ptr={-1:0}, ptr={-1:0}, ptr -> state=1] [L45] ptr -> state = 2 VAL [ptr={-1:0}, ptr={-1:0}] [L52] RET freePtr(ptr1) VAL [ptr1={-1:0}] [L54] CALL freePtr(ptr1) VAL [ptr={-1:0}] [L44] EXPR ptr -> state VAL [ptr={-1:0}, ptr={-1:0}, ptr -> state=2] [L44] (ptr -> state == 1) ? (0) : __blast_assert () VAL [ptr={-1:0}, ptr={-1:0}, ptr -> state=2] [L44] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 3 SDslu, 110 SDs, 0 SdLazy, 38 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 969 SizeOfPredicates, 8 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 26 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...