/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:28:31,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:28:31,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:28:31,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:28:31,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:28:31,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:28:31,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:28:31,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:28:31,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:28:31,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:28:31,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:28:31,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:28:31,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:28:31,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:28:31,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:28:31,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:28:31,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:28:31,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:28:31,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:28:31,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:28:31,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:28:31,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:28:31,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:28:31,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:28:31,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:28:31,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:28:31,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:28:31,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:28:31,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:28:31,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:28:31,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:28:31,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:28:31,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:28:31,491 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:28:31,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:28:31,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:28:31,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:28:31,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:28:31,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:28:31,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:28:31,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:28:31,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:28:31,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:28:31,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:28:31,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:28:31,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:28:31,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:28:31,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:28:31,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:28:31,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:28:31,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:31,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:28:31,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:28:31,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:28:31,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:28:31,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:28:31,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:28:31,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:28:31,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:28:31,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:28:31,994 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:28:31,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:28:32,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:28:32,001 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:28:32,002 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-09-21 10:28:32,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ac4e0ec/008c4d50cdff4ac2afc153240285e5a7/FLAG750db736f [2020-09-21 10:28:32,621 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:28:32,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4iff.c [2020-09-21 10:28:32,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ac4e0ec/008c4d50cdff4ac2afc153240285e5a7/FLAG750db736f [2020-09-21 10:28:32,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ac4e0ec/008c4d50cdff4ac2afc153240285e5a7 [2020-09-21 10:28:32,945 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:28:32,951 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:28:32,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:32,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:28:32,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:28:32,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:32" (1/1) ... [2020-09-21 10:28:32,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cac9c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:32, skipping insertion in model container [2020-09-21 10:28:32,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:32" (1/1) ... [2020-09-21 10:28:32,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:28:33,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:28:33,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:33,236 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:28:33,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:33,276 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:28:33,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33 WrapperNode [2020-09-21 10:28:33,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:33,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:28:33,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:28:33,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:28:33,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (1/1) ... [2020-09-21 10:28:33,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (1/1) ... [2020-09-21 10:28:33,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (1/1) ... [2020-09-21 10:28:33,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (1/1) ... [2020-09-21 10:28:33,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (1/1) ... [2020-09-21 10:28:33,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (1/1) ... [2020-09-21 10:28:33,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (1/1) ... [2020-09-21 10:28:33,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:28:33,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:28:33,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:28:33,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:28:33,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 10:28:33,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:28:33,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:28:33,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:28:33,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:28:33,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:28:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:28:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:28:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:28:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:28:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:28:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:28:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:28:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:28:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:28:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:28:33,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:28:33,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:28:33,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:28:33,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:28:33,804 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:28:33,804 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 10:28:33,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:33 BoogieIcfgContainer [2020-09-21 10:28:33,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:28:33,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:28:33,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:28:33,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:28:33,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:28:32" (1/3) ... [2020-09-21 10:28:33,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31420746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:33, skipping insertion in model container [2020-09-21 10:28:33,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:33" (2/3) ... [2020-09-21 10:28:33,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31420746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:33, skipping insertion in model container [2020-09-21 10:28:33,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:33" (3/3) ... [2020-09-21 10:28:33,819 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-09-21 10:28:33,833 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:28:33,843 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:28:33,865 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:28:33,895 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:28:33,896 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:28:33,896 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:28:33,896 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:28:33,896 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:28:33,896 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:28:33,896 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:28:33,897 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:28:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-09-21 10:28:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:28:33,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:33,926 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] [2020-09-21 10:28:33,926 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-09-21 10:28:33,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:33,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157695708] [2020-09-21 10:28:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:34,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:34,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:34,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157695708] [2020-09-21 10:28:34,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:34,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:28:34,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427775800] [2020-09-21 10:28:34,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:28:34,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:28:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:34,209 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-09-21 10:28:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:34,318 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-09-21 10:28:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:28:34,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:28:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:34,332 INFO L225 Difference]: With dead ends: 54 [2020-09-21 10:28:34,332 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 10:28:34,337 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 [2020-09-21 10:28:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 10:28:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 10:28:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 10:28:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-21 10:28:34,387 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-09-21 10:28:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:34,388 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-21 10:28:34,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:28:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-21 10:28:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:28:34,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:34,390 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] [2020-09-21 10:28:34,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:28:34,390 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-09-21 10:28:34,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:34,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628045737] [2020-09-21 10:28:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:34,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:34,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:34,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628045737] [2020-09-21 10:28:34,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:34,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:34,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288228504] [2020-09-21 10:28:34,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:34,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:34,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:34,518 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-09-21 10:28:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:34,646 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-09-21 10:28:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:28:34,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-21 10:28:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:34,648 INFO L225 Difference]: With dead ends: 40 [2020-09-21 10:28:34,648 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 10:28:34,649 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 [2020-09-21 10:28:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 10:28:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-21 10:28:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 10:28:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-21 10:28:34,657 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-09-21 10:28:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:34,658 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-21 10:28:34,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-21 10:28:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:28:34,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:34,659 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] [2020-09-21 10:28:34,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:28:34,660 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-09-21 10:28:34,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:34,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911477459] [2020-09-21 10:28:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:35,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:35,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:35,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911477459] [2020-09-21 10:28:35,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:35,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:28:35,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346069320] [2020-09-21 10:28:35,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:28:35,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:28:35,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:28:35,083 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2020-09-21 10:28:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:35,555 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-09-21 10:28:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:28:35,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-09-21 10:28:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:35,560 INFO L225 Difference]: With dead ends: 42 [2020-09-21 10:28:35,560 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 10:28:35,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:28:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 10:28:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-09-21 10:28:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 10:28:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-21 10:28:35,578 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2020-09-21 10:28:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:35,579 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-21 10:28:35,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:28:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-21 10:28:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:28:35,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:35,582 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] [2020-09-21 10:28:35,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:28:35,583 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:35,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1255066423, now seen corresponding path program 1 times [2020-09-21 10:28:35,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:35,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243903692] [2020-09-21 10:28:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:35,614 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-21 10:28:35,614 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-21 10:28:35,614 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:28:35,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:28:35,639 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-21 10:28:35,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:28:35 BoogieIcfgContainer [2020-09-21 10:28:35,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:28:35,644 INFO L168 Benchmark]: Toolchain (without parser) took 2695.20 ms. Allocated memory was 142.6 MB in the beginning and 232.3 MB in the end (delta: 89.7 MB). Free memory was 105.8 MB in the beginning and 134.4 MB in the end (delta: -28.6 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:35,645 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.6 MB. Free memory was 124.2 MB in the beginning and 123.7 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-09-21 10:28:35,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.70 ms. Allocated memory is still 142.6 MB. Free memory was 105.0 MB in the beginning and 94.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:35,647 INFO L168 Benchmark]: Boogie Preprocessor took 124.95 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 94.6 MB in the beginning and 182.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:35,648 INFO L168 Benchmark]: RCFGBuilder took 405.99 ms. Allocated memory is still 205.0 MB. Free memory was 182.6 MB in the beginning and 165.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:35,649 INFO L168 Benchmark]: TraceAbstraction took 1829.79 ms. Allocated memory was 205.0 MB in the beginning and 232.3 MB in the end (delta: 27.3 MB). Free memory was 164.5 MB in the beginning and 134.4 MB in the end (delta: 30.2 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:35,653 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 142.6 MB. Free memory was 124.2 MB in the beginning and 123.7 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.70 ms. Allocated memory is still 142.6 MB. Free memory was 105.0 MB in the beginning and 94.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.95 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 94.6 MB in the beginning and 182.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 405.99 ms. Allocated memory is still 205.0 MB. Free memory was 182.6 MB in the beginning and 165.5 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1829.79 ms. Allocated memory was 205.0 MB in the beginning and 232.3 MB in the end (delta: 27.3 MB). Free memory was 164.5 MB in the beginning and 134.4 MB in the end (delta: 30.2 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 [L30] COND TRUE i