/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:55:21,917 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 03:55:21,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:55:21,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:55:21,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:55:21,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:55:21,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:55:21,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:55:21,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:55:21,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:55:21,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:55:21,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:55:21,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:55:21,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:55:21,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:55:21,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:55:21,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:55:21,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:55:21,990 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 03:55:22,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:55:22,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:55:22,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:55:22,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:55:22,007 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:55:22,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:55:22,007 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:55:22,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:55:22,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:55:22,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:55:22,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:55:22,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:55:22,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:55:22,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:55:22,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:55:22,009 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:55:22,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:55:22,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:55:22,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:55:22,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:55:22,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:55:22,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:55:22,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:55:22,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:55:22,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:55:22,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:55:22,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:55:22,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:55:22,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:55:22,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:55:22,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:55:22,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:55:22,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:55:22,307 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:55:22,308 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:55:22,309 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn1f.c [2020-07-20 03:55:22,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b8a3b98c/93b03eb49a7d475a8148e19771328548/FLAG604b9fd04 [2020-07-20 03:55:22,882 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:55:22,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn1f.c [2020-07-20 03:55:22,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b8a3b98c/93b03eb49a7d475a8148e19771328548/FLAG604b9fd04 [2020-07-20 03:55:23,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b8a3b98c/93b03eb49a7d475a8148e19771328548 [2020-07-20 03:55:23,264 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:55:23,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:55:23,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:55:23,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:55:23,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:55:23,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a9b1c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23, skipping insertion in model container [2020-07-20 03:55:23,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:55:23,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:55:23,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:55:23,534 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:55:23,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:55:23,582 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:55:23,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23 WrapperNode [2020-07-20 03:55:23,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:55:23,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:55:23,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:55:23,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:55:23,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (1/1) ... [2020-07-20 03:55:23,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:55:23,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:55:23,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:55:23,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:55:23,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (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 03:55:23,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:55:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:55:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 03:55:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:55:23,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:55:23,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:55:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 03:55:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 03:55:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:55:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:55:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 03:55:23,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:55:23,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 03:55:23,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 03:55:23,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 03:55:23,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:55:23,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:55:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:55:24,114 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:55:24,115 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 03:55:24,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:55:24 BoogieIcfgContainer [2020-07-20 03:55:24,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:55:24,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:55:24,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:55:24,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:55:24,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:55:23" (1/3) ... [2020-07-20 03:55:24,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659ee540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:55:24, skipping insertion in model container [2020-07-20 03:55:24,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:55:23" (2/3) ... [2020-07-20 03:55:24,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659ee540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:55:24, skipping insertion in model container [2020-07-20 03:55:24,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:55:24" (3/3) ... [2020-07-20 03:55:24,129 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn1f.c [2020-07-20 03:55:24,141 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:55:24,149 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:55:24,164 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:55:24,203 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:55:24,204 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:55:24,204 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:55:24,204 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:55:24,204 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:55:24,204 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:55:24,205 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:55:24,205 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:55:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 03:55:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:55:24,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:24,234 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] [2020-07-20 03:55:24,235 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 03:55:24,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:24,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087926671] [2020-07-20 03:55:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b882495 [2020-07-20 03:55:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:24,530 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 03:55:24,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087926671] [2020-07-20 03:55:24,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:24,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:55:24,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957218303] [2020-07-20 03:55:24,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:55:24,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:24,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:55:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:55:24,576 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-20 03:55:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:24,778 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 03:55:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:55:24,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 03:55:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:24,806 INFO L225 Difference]: With dead ends: 62 [2020-07-20 03:55:24,807 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 03:55:24,816 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 [2020-07-20 03:55:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 03:55:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 03:55:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 03:55:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 03:55:24,857 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-20 03:55:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:24,858 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 03:55:24,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:55:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 03:55:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:55:24,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:24,860 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] [2020-07-20 03:55:24,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:55:24,860 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-20 03:55:24,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:24,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526745076] [2020-07-20 03:55:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b882495 [2020-07-20 03:55:24,889 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:24,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220389526] [2020-07-20 03:55:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63a60bb7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:24,973 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63a60bb7 issued 2 check-sat command(s) [2020-07-20 03:55:24,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:24,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:55:24,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:25,032 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 03:55:25,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526745076] [2020-07-20 03:55:25,033 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:55:25,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220389526] [2020-07-20 03:55:25,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:25,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 03:55:25,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872511991] [2020-07-20 03:55:25,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:55:25,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:25,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:55:25,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:55:25,037 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-20 03:55:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:25,128 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-20 03:55:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:55:25,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 03:55:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:25,133 INFO L225 Difference]: With dead ends: 56 [2020-07-20 03:55:25,133 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 03:55:25,134 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 [2020-07-20 03:55:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 03:55:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 03:55:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:55:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 03:55:25,149 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 03:55:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:25,150 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 03:55:25,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:55:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 03:55:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:55:25,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:25,151 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] [2020-07-20 03:55:25,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:55:25,357 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 03:55:25,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:25,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85129263] [2020-07-20 03:55:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b882495 [2020-07-20 03:55:25,392 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:55:25,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714831543] [2020-07-20 03:55:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a596c8a 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 [2020-07-20 03:55:25,497 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a596c8a issued 4 check-sat command(s) [2020-07-20 03:55:25,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 03:55:25,499 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:55:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:55:25,531 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:55:25,567 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:55:25,568 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:55:25,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:25,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:55:25 BoogieIcfgContainer [2020-07-20 03:55:25,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:55:25,828 INFO L168 Benchmark]: Toolchain (without parser) took 2561.14 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 103.1 MB in the beginning and 93.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:25,829 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 03:55:25,830 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.19 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:25,831 INFO L168 Benchmark]: Boogie Preprocessor took 149.27 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 180.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:25,832 INFO L168 Benchmark]: RCFGBuilder took 387.75 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 162.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:25,833 INFO L168 Benchmark]: TraceAbstraction took 1703.12 ms. Allocated memory is still 202.9 MB. Free memory was 162.7 MB in the beginning and 93.2 MB in the end (delta: 69.5 MB). Peak memory consumption was 69.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:55:25,837 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.19 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.27 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 180.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.75 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 162.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1703.12 ms. Allocated memory is still 202.9 MB. Free memory was 162.7 MB in the beginning and 93.2 MB in the end (delta: 69.5 MB). Peak memory consumption was 69.5 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)=3, 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={-1:0}, b={1:0}, i=0, malloc(sizeof(long long)*N)={1:0}, malloc(sizeof(long long)*N)={-1:0}, N=1] [L29] COND TRUE i