/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 BIGGEST_EQUIVALENCE_CLASS --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/s22iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:05:28,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:05:28,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:05:28,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 06:05:28,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:05:28,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:05:28,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:05:28,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:05:28,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:05:28,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:05:28,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:05:28,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:05:28,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:05:28,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:05:28,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:05:28,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:05:28,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:05:28,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:05:28,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:05:28,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:05:28,628 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 06:05:28,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:05:28,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:05:28,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:05:28,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:05:28,647 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:05:28,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:05:28,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:05:28,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:05:28,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:05:28,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:05:28,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:05:28,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:05:28,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:05:28,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:05:28,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:05:28,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:05:28,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:05:28,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:05:28,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:05:28,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:05:28,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:05:28,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:05:28,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:05:28,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:05:28,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:05:28,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:05:28,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:05:28,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:05:28,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:05:28,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 06:05:28,927 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:05:28,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:05:28,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:05:28,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:05:28,947 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:05:28,948 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s22iff.c [2020-07-20 06:05:29,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdee6286/163237bb1e3141fb8607f95bff1b81a2/FLAG6f11824ad [2020-07-20 06:05:29,472 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:05:29,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s22iff.c [2020-07-20 06:05:29,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdee6286/163237bb1e3141fb8607f95bff1b81a2/FLAG6f11824ad [2020-07-20 06:05:29,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdee6286/163237bb1e3141fb8607f95bff1b81a2 [2020-07-20 06:05:29,898 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:05:29,901 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:05:29,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:05:29,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:05:29,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:05:29,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:05:29" (1/1) ... [2020-07-20 06:05:29,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436346a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:29, skipping insertion in model container [2020-07-20 06:05:29,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:05:29" (1/1) ... [2020-07-20 06:05:29,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:05:29,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:05:30,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:05:30,181 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:05:30,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:05:30,304 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:05:30,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30 WrapperNode [2020-07-20 06:05:30,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:05:30,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:05:30,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:05:30,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:05:30,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (1/1) ... [2020-07-20 06:05:30,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (1/1) ... [2020-07-20 06:05:30,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (1/1) ... [2020-07-20 06:05:30,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (1/1) ... [2020-07-20 06:05:30,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (1/1) ... [2020-07-20 06:05:30,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (1/1) ... [2020-07-20 06:05:30,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (1/1) ... [2020-07-20 06:05:30,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:05:30,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:05:30,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:05:30,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:05:30,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (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 06:05:30,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:05:30,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:05:30,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:05:30,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:05:30,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:05:30,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:05:30,422 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:05:30,422 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:05:30,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:05:30,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:05:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 06:05:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:05:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 06:05:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 06:05:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:05:30,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:05:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:05:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:05:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:05:30,850 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:05:30,850 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 06:05:30,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:05:30 BoogieIcfgContainer [2020-07-20 06:05:30,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:05:30,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:05:30,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:05:30,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:05:30,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:05:29" (1/3) ... [2020-07-20 06:05:30,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:05:30, skipping insertion in model container [2020-07-20 06:05:30,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:05:30" (2/3) ... [2020-07-20 06:05:30,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:05:30, skipping insertion in model container [2020-07-20 06:05:30,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:05:30" (3/3) ... [2020-07-20 06:05:30,867 INFO L109 eAbstractionObserver]: Analyzing ICFG s22iff.c [2020-07-20 06:05:30,876 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:05:30,883 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:05:30,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:05:30,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:05:30,922 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:05:30,922 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:05:30,923 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:05:30,923 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:05:30,923 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:05:30,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:05:30,923 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:05:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 06:05:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 06:05:30,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:05:30,953 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] [2020-07-20 06:05:30,953 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:05:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:05:30,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2033030480, now seen corresponding path program 1 times [2020-07-20 06:05:30,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:05:30,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302431371] [2020-07-20 06:05:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b29c9a7 [2020-07-20 06:05:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:05:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:05:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:05:31,187 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 06:05:31,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302431371] [2020-07-20 06:05:31,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:05:31,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:05:31,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841077326] [2020-07-20 06:05:31,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:05:31,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:05:31,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:05:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:05:31,215 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-20 06:05:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:05:31,340 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 06:05:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:05:31,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 06:05:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:05:31,352 INFO L225 Difference]: With dead ends: 62 [2020-07-20 06:05:31,353 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 06:05:31,356 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 06:05:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 06:05:31,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 06:05:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 06:05:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-20 06:05:31,397 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-07-20 06:05:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:05:31,398 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-20 06:05:31,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:05:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-20 06:05:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 06:05:31,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:05:31,400 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] [2020-07-20 06:05:31,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:05:31,401 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:05:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:05:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash 706992569, now seen corresponding path program 1 times [2020-07-20 06:05:31,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:05:31,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434385324] [2020-07-20 06:05:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b29c9a7 [2020-07-20 06:05:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:05:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:05:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:05:31,535 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 06:05:31,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434385324] [2020-07-20 06:05:31,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:05:31,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:05:31,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030217671] [2020-07-20 06:05:31,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:05:31,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:05:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:05:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:05:31,540 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-07-20 06:05:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:05:31,698 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-07-20 06:05:31,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:05:31,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-07-20 06:05:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:05:31,701 INFO L225 Difference]: With dead ends: 51 [2020-07-20 06:05:31,701 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 06:05:31,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:05:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 06:05:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-07-20 06:05:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 06:05:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 06:05:31,712 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-07-20 06:05:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:05:31,713 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 06:05:31,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:05:31,713 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 06:05:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 06:05:31,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:05:31,715 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, 1, 1, 1] [2020-07-20 06:05:31,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:05:31,716 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:05:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:05:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash 284203188, now seen corresponding path program 1 times [2020-07-20 06:05:31,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:05:31,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8842867] [2020-07-20 06:05:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b29c9a7 [2020-07-20 06:05:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:05:31,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:05:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:05:31,874 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:05:31,930 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 06:05:31,930 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 06:05:31,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 06:05:32,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:05:32 BoogieIcfgContainer [2020-07-20 06:05:32,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:05:32,024 INFO L168 Benchmark]: Toolchain (without parser) took 2119.83 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.4 MB in the beginning and 100.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:05:32,025 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 06:05:32,028 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.25 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 182.0 MB in the end (delta: -80.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-20 06:05:32,029 INFO L168 Benchmark]: Boogie Preprocessor took 45.94 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 179.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:05:32,033 INFO L168 Benchmark]: RCFGBuilder took 502.96 ms. Allocated memory is still 203.4 MB. Free memory was 179.7 MB in the beginning and 161.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:05:32,034 INFO L168 Benchmark]: TraceAbstraction took 1161.77 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 100.6 MB in the end (delta: 60.7 MB). Peak memory consumption was 60.7 MB. Max. memory is 7.1 GB. [2020-07-20 06:05:32,042 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 402.25 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 182.0 MB in the end (delta: -80.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.94 ms. Allocated memory is still 203.4 MB. Free memory was 182.0 MB in the beginning and 179.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 502.96 ms. Allocated memory is still 203.4 MB. Free memory was 179.7 MB in the beginning and 161.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1161.77 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 100.6 MB in the end (delta: 60.7 MB). Peak memory consumption was 60.7 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)=10, 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 sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i