/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:42:35,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:35,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:35,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:35,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:35,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:35,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:35,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:35,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:35,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:35,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:35,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:35,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:35,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:35,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:35,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:35,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:35,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:35,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:35,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:35,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:35,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:35,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:35,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:35,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:42:35,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:42:35,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:42:35,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:42:35,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:42:35,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:42:35,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:42:35,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:42:35,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:42:35,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:35,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:35,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:35,626 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 [2020-09-04 13:42:35,653 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:35,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:35,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:35,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:35,655 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:35,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:35,655 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:35,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:35,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:35,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:35,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:35,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:35,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:35,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:35,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:35,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:35,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:35,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:35,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:35,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:35,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:35,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:35,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:35,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:35,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:35,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:35,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:35,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:35,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:35,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:36,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:36,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:36,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:36,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:36,148 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:36,150 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c [2020-09-04 13:42:36,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cef7b5da/b7dd0be931ac4c29a2747a75982856a4/FLAG154336603 [2020-09-04 13:42:36,808 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:36,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/nsqm-iff.c [2020-09-04 13:42:36,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cef7b5da/b7dd0be931ac4c29a2747a75982856a4/FLAG154336603 [2020-09-04 13:42:37,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cef7b5da/b7dd0be931ac4c29a2747a75982856a4 [2020-09-04 13:42:37,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:37,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:37,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:37,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:37,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:37,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8484e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37, skipping insertion in model container [2020-09-04 13:42:37,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:37,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:37,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:37,480 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:37,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:37,530 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:37,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37 WrapperNode [2020-09-04 13:42:37,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:37,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:37,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:37,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:37,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (1/1) ... [2020-09-04 13:42:37,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:37,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:37,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:37,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:37,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (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 [2020-09-04 13:42:37,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:37,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:37,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:42:37,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:42:37,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:37,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:37,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:42:37,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:42:37,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:42:37,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:37,838 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 13:42:37,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:37,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 13:42:37,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:37,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:37,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:37,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:37,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:38,238 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:38,239 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 13:42:38,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:38 BoogieIcfgContainer [2020-09-04 13:42:38,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:38,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:38,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:38,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:38,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:37" (1/3) ... [2020-09-04 13:42:38,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c586682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:38, skipping insertion in model container [2020-09-04 13:42:38,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:37" (2/3) ... [2020-09-04 13:42:38,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c586682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:38, skipping insertion in model container [2020-09-04 13:42:38,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:38" (3/3) ... [2020-09-04 13:42:38,254 INFO L109 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2020-09-04 13:42:38,266 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:38,277 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:38,296 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:38,325 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:38,325 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:38,325 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:38,325 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:38,325 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:38,325 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:38,325 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:38,325 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-09-04 13:42:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:38,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:38,356 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] [2020-09-04 13:42:38,356 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-09-04 13:42:38,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:38,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460731026] [2020-09-04 13:42:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:38,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:38,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:38,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460731026] [2020-09-04 13:42:38,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:38,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:42:38,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036699933] [2020-09-04 13:42:38,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:38,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:38,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:38,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:38,665 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-09-04 13:42:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:38,801 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-09-04 13:42:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:38,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 13:42:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:38,814 INFO L225 Difference]: With dead ends: 62 [2020-09-04 13:42:38,814 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 13:42:38,819 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 [2020-09-04 13:42:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 13:42:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-04 13:42:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 13:42:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-04 13:42:38,861 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-09-04 13:42:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:38,861 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-04 13:42:38,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:38,861 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-04 13:42:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:38,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:38,863 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] [2020-09-04 13:42:38,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:42:38,863 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:38,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-09-04 13:42:38,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:38,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205214173] [2020-09-04 13:42:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:38,895 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:38,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327170884] [2020-09-04 13:42:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:38,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:39,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205214173] [2020-09-04 13:42:39,056 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:39,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327170884] [2020-09-04 13:42:39,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:39,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:42:39,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840969960] [2020-09-04 13:42:39,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:39,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:39,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:39,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:39,065 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-09-04 13:42:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:39,175 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-09-04 13:42:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:39,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-04 13:42:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:39,179 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:42:39,180 INFO L226 Difference]: Without dead ends: 41 [2020-09-04 13:42:39,181 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 [2020-09-04 13:42:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-04 13:42:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-09-04 13:42:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:42:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-04 13:42:39,196 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-09-04 13:42:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:39,197 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-04 13:42:39,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-04 13:42:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:42:39,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:39,199 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] [2020-09-04 13:42:39,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:42:39,413 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:39,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-09-04 13:42:39,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:39,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960646237] [2020-09-04 13:42:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:39,463 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:39,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822381074] [2020-09-04 13:42:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:39,532 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:39,552 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:39,577 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:42:39,577 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:42:39,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:39,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:42:39 BoogieIcfgContainer [2020-09-04 13:42:39,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:42:39,832 INFO L168 Benchmark]: Toolchain (without parser) took 2674.63 ms. Allocated memory was 147.3 MB in the beginning and 207.6 MB in the end (delta: 60.3 MB). Free memory was 103.4 MB in the beginning and 98.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:39,833 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 13:42:39,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.92 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 92.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:39,837 INFO L168 Benchmark]: Boogie Preprocessor took 222.13 ms. Allocated memory was 147.3 MB in the beginning and 207.6 MB in the end (delta: 60.3 MB). Free memory was 92.7 MB in the beginning and 185.6 MB in the end (delta: -92.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:39,838 INFO L168 Benchmark]: RCFGBuilder took 490.21 ms. Allocated memory is still 207.6 MB. Free memory was 185.6 MB in the beginning and 167.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:39,839 INFO L168 Benchmark]: TraceAbstraction took 1583.38 ms. Allocated memory is still 207.6 MB. Free memory was 166.9 MB in the beginning and 98.3 MB in the end (delta: 68.7 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:39,846 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 371.92 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 92.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 222.13 ms. Allocated memory was 147.3 MB in the beginning and 207.6 MB in the end (delta: 60.3 MB). Free memory was 92.7 MB in the beginning and 185.6 MB in the end (delta: -92.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 490.21 ms. Allocated memory is still 207.6 MB. Free memory was 185.6 MB in the beginning and 167.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1583.38 ms. Allocated memory is still 207.6 MB. Free memory was 166.9 MB in the beginning and 98.3 MB in the end (delta: 68.7 MB). Peak memory consumption was 68.7 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)=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