/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:22,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:22,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:22,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:22,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:22,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:22,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:22,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:22,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:22,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:22,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:22,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:22,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:22,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:22,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:22,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:22,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:22,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:22,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:22,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:22,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:22,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:22,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:22,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:22,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:22,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:22,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:22,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:22,806 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 [2020-08-22 16:56:22,842 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:22,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:22,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:22,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:22,844 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:22,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:22,844 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:22,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:22,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:22,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:22,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:22,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:22,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:22,847 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:22,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:22,847 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:22,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:22,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:22,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:22,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:22,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:22,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:22,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:22,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:22,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:22,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:22,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:22,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:22,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:22,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:23,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:23,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:23,151 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:23,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:23,152 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:23,153 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn2f.c [2020-08-22 16:56:23,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e289e1db1/19d9f2d6055d4c7b9cb399a480a58284/FLAG3837ad9cb [2020-08-22 16:56:23,628 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:23,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn2f.c [2020-08-22 16:56:23,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e289e1db1/19d9f2d6055d4c7b9cb399a480a58284/FLAG3837ad9cb [2020-08-22 16:56:24,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e289e1db1/19d9f2d6055d4c7b9cb399a480a58284 [2020-08-22 16:56:24,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:24,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:24,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:24,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:24,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:24,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e9fdee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24, skipping insertion in model container [2020-08-22 16:56:24,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:24,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:24,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:24,351 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:24,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:24,416 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:24,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24 WrapperNode [2020-08-22 16:56:24,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:24,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:24,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:24,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:24,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (1/1) ... [2020-08-22 16:56:24,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:24,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:24,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:24,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:24,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (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 [2020-08-22 16:56:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:56:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:56:24,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:56:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:56:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:56:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:56:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:56:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:25,058 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:25,059 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:56:25,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:25 BoogieIcfgContainer [2020-08-22 16:56:25,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:25,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:25,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:25,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:25,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:24" (1/3) ... [2020-08-22 16:56:25,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55750928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:25, skipping insertion in model container [2020-08-22 16:56:25,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:24" (2/3) ... [2020-08-22 16:56:25,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55750928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:25, skipping insertion in model container [2020-08-22 16:56:25,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:25" (3/3) ... [2020-08-22 16:56:25,072 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn2f.c [2020-08-22 16:56:25,084 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:25,091 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:25,105 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:25,129 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:25,129 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:25,129 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:25,129 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:25,130 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:25,130 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:25,130 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:25,131 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-22 16:56:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:25,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:25,158 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, 1, 1] [2020-08-22 16:56:25,158 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-08-22 16:56:25,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:25,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247657700] [2020-08-22 16:56:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:25,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:25,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:25,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247657700] [2020-08-22 16:56:25,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:25,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:25,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966525318] [2020-08-22 16:56:25,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:25,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:25,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:25,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:25,393 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-22 16:56:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:25,533 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-08-22 16:56:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:25,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:56:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:25,545 INFO L225 Difference]: With dead ends: 62 [2020-08-22 16:56:25,545 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 16:56:25,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 16:56:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 16:56:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 16:56:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 16:56:25,591 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 16:56:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:25,592 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 16:56:25,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 16:56:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:25,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:25,593 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, 1, 1] [2020-08-22 16:56:25,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:56:25,594 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:25,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-08-22 16:56:25,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:25,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297531209] [2020-08-22 16:56:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:25,621 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:25,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465679367] [2020-08-22 16:56:25,622 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:25,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:25,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297531209] [2020-08-22 16:56:25,756 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:25,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465679367] [2020-08-22 16:56:25,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:25,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:56:25,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149989154] [2020-08-22 16:56:25,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:25,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:25,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:25,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:25,760 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-08-22 16:56:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:25,840 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-08-22 16:56:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:56:25,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-22 16:56:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:25,844 INFO L225 Difference]: With dead ends: 56 [2020-08-22 16:56:25,844 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 16:56:25,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 16:56:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-22 16:56:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:56:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 16:56:25,858 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-08-22 16:56:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:25,859 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 16:56:25,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 16:56:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:56:25,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:25,861 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:26,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:56:26,076 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:26,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-08-22 16:56:26,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:26,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68398858] [2020-08-22 16:56:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:26,109 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:26,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586009126] [2020-08-22 16:56:26,110 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:26,170 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:26,187 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:26,212 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:56:26,212 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:56:26,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:26,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:56:26 BoogieIcfgContainer [2020-08-22 16:56:26,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:56:26,485 INFO L168 Benchmark]: Toolchain (without parser) took 2417.03 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.2 MB in the beginning and 94.9 MB in the end (delta: 8.3 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:26,500 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:26,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.64 ms. Allocated memory is still 141.0 MB. Free memory was 102.8 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:26,503 INFO L168 Benchmark]: Boogie Preprocessor took 151.99 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 181.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:26,504 INFO L168 Benchmark]: RCFGBuilder took 492.43 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 163.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:26,504 INFO L168 Benchmark]: TraceAbstraction took 1417.74 ms. Allocated memory is still 203.9 MB. Free memory was 163.3 MB in the beginning and 94.9 MB in the end (delta: 68.3 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:26,509 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 349.64 ms. Allocated memory is still 141.0 MB. Free memory was 102.8 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.99 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 181.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 492.43 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 163.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1417.74 ms. Allocated memory is still 203.9 MB. Free memory was 163.3 MB in the beginning and 94.9 MB in the end (delta: 68.3 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={2:0}, b={1:0}, i=0, malloc(sizeof(long long)*N)={2:0}, malloc(sizeof(long long)*N)={1:0}, N=1] [L29] COND TRUE i