/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 NOT_INCREMENTALLY -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 [2020-07-20 11:28:34,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:28:34,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:28:34,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:28:34,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:28:34,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:28:34,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:28:34,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:28:34,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:28:34,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:28:34,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:28:34,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:28:34,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:28:34,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:28:34,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:28:34,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:28:34,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:28:34,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:28:34,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:28:34,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:28:34,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:28:34,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:28:34,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:28:34,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:28:34,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:28:34,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:28:34,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:28:34,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:28:34,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:28:34,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:28:34,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:28:34,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:28:34,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:28:34,747 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:28:34,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:28:34,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:28:34,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:28:34,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:28:34,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:28:34,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:28:34,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:28:34,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:28:34,752 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:28:34,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:28:34,752 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:28:34,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:28:34,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:28:34,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:28:34,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:28:34,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:28:34,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:28:34,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:28:34,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:28:34,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:28:34,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:28:34,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:34,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:28:34,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:28:34,756 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 -> NOT_INCREMENTALLY [2020-07-20 11:28:35,171 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:28:35,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:28:35,194 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:28:35,196 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:28:35,197 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:28:35,199 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/1_3.i [2020-07-20 11:28:35,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10212e479/11a6bc1c6a5244a19ba38eb371feef06/FLAGbe94a9693 [2020-07-20 11:28:35,951 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:28:35,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/1_3.i [2020-07-20 11:28:35,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10212e479/11a6bc1c6a5244a19ba38eb371feef06/FLAGbe94a9693 [2020-07-20 11:28:36,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10212e479/11a6bc1c6a5244a19ba38eb371feef06 [2020-07-20 11:28:36,294 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:28:36,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:28:36,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:28:36,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:28:36,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:28:36,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e60225c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36, skipping insertion in model container [2020-07-20 11:28:36,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:28:36,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:28:36,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:28:36,619 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:28:36,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:28:36,659 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:28:36,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36 WrapperNode [2020-07-20 11:28:36,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:28:36,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:28:36,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:28:36,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:28:36,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (1/1) ... [2020-07-20 11:28:36,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:28:36,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:28:36,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:28:36,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:28:36,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:28:36,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:28:36,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:28:36,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-20 11:28:36,899 INFO L138 BoogieDeclarations]: Found implementation of procedure getrr [2020-07-20 11:28:36,899 INFO L138 BoogieDeclarations]: Found implementation of procedure getPtr [2020-07-20 11:28:36,899 INFO L138 BoogieDeclarations]: Found implementation of procedure freePtr [2020-07-20 11:28:36,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:28:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:28:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-20 11:28:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:28:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:28:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure getrr [2020-07-20 11:28:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:28:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:28:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure getPtr [2020-07-20 11:28:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure freePtr [2020-07-20 11:28:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:28:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:28:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:28:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:28:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:28:37,237 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:28:37,238 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:28:37,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:28:37 BoogieIcfgContainer [2020-07-20 11:28:37,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:28:37,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:28:37,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:28:37,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:28:37,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:28:36" (1/3) ... [2020-07-20 11:28:37,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a345156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:28:37, skipping insertion in model container [2020-07-20 11:28:37,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:28:36" (2/3) ... [2020-07-20 11:28:37,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a345156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:28:37, skipping insertion in model container [2020-07-20 11:28:37,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:28:37" (3/3) ... [2020-07-20 11:28:37,255 INFO L109 eAbstractionObserver]: Analyzing ICFG 1_3.i [2020-07-20 11:28:37,266 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:28:37,273 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:28:37,288 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:28:37,322 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:28:37,322 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:28:37,322 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:28:37,322 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:28:37,323 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:28:37,323 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:28:37,323 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:28:37,323 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:28:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 11:28:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:28:37,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:28:37,359 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] [2020-07-20 11:28:37,360 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:28:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:28:37,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1862665640, now seen corresponding path program 1 times [2020-07-20 11:28:37,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:28:37,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970102803] [2020-07-20 11:28:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:28:37,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 11:28:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:28:37,596 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 [2020-07-20 11:28:37,597 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:37,607 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:37,608 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:28:37,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 11:28:37,708 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 [2020-07-20 11:28:37,709 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:28:37,713 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:28:37,714 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:28:37,715 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 11:28:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:28:37,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:28:37,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970102803] [2020-07-20 11:28:37,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:28:37,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 11:28:37,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048425222] [2020-07-20 11:28:37,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:28:37,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:28:37,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:28:37,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:28:37,771 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 7 states. [2020-07-20 11:28:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:28:37,922 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-07-20 11:28:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:28:37,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-20 11:28:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:28:37,938 INFO L225 Difference]: With dead ends: 49 [2020-07-20 11:28:37,938 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 11:28:37,944 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 [2020-07-20 11:28:37,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 11:28:38,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 11:28:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 11:28:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 26 transitions. [2020-07-20 11:28:38,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 26 transitions. Word has length 20 [2020-07-20 11:28:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:28:38,010 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 26 transitions. [2020-07-20 11:28:38,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:28:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 26 transitions. [2020-07-20 11:28:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:28:38,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:28:38,012 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] [2020-07-20 11:28:38,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:38,228 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:28:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:28:38,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1146014323, now seen corresponding path program 1 times [2020-07-20 11:28:38,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:28:38,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075700198] [2020-07-20 11:28:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:28:38,298 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:28:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:28:38,325 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:28:38,357 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:28:38,358 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:28:38,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:28:38,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:28:38 BoogieIcfgContainer [2020-07-20 11:28:38,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:28:38,627 INFO L168 Benchmark]: Toolchain (without parser) took 2331.46 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 102.4 MB in the beginning and 106.8 MB in the end (delta: -4.4 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:38,628 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:28:38,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.18 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:38,631 INFO L168 Benchmark]: Boogie Preprocessor took 132.92 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 178.4 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:38,632 INFO L168 Benchmark]: RCFGBuilder took 442.98 ms. Allocated memory is still 200.3 MB. Free memory was 178.4 MB in the beginning and 163.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:38,633 INFO L168 Benchmark]: TraceAbstraction took 1379.93 ms. Allocated memory is still 200.3 MB. Free memory was 163.1 MB in the beginning and 106.8 MB in the end (delta: 56.3 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:28:38,638 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.18 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.92 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 178.4 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 442.98 ms. Allocated memory is still 200.3 MB. Free memory was 178.4 MB in the beginning and 163.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1379.93 ms. Allocated memory is still 200.3 MB. Free memory was 163.1 MB in the beginning and 106.8 MB in the end (delta: 56.3 MB). Peak memory consumption was 56.3 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 2 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...