/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/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:15:12,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:15:12,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:15:12,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:15:12,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:15:12,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:15:12,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:15:12,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:15:12,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:15:12,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:15:12,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:15:12,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:15:12,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:15:12,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:15:12,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:15:12,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:15:12,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:15:12,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:15:12,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:15:12,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:15:12,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:15:12,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:15:12,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:15:12,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:15:12,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:15:12,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:15:12,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:15:12,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:15:12,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:15:12,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:15:12,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:15:12,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:15:12,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:15:12,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:15:12,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:15:12,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:15:12,446 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 [2020-07-17 12:15:12,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:15:12,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:15:12,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:15:12,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:15:12,463 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:15:12,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:15:12,463 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:15:12,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:15:12,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:15:12,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:15:12,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:15:12,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:15:12,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:15:12,464 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:15:12,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:15:12,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:15:12,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:15:12,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:15:12,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:15:12,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:15:12,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:15:12,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:15:12,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:15:12,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:15:12,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:15:12,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:15:12,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:15:12,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:15:12,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:15:12,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:15:12,805 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:15:12,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:15:12,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:15:12,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:15:12,823 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:15:12,824 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-17 12:15:12,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c244fe773/19e464baa2a44dfbad634bc74981564e/FLAG6713fb5f7 [2020-07-17 12:15:13,422 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:15:13,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-17 12:15:13,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c244fe773/19e464baa2a44dfbad634bc74981564e/FLAG6713fb5f7 [2020-07-17 12:15:13,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c244fe773/19e464baa2a44dfbad634bc74981564e [2020-07-17 12:15:13,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:15:13,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:15:13,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:13,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:15:13,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:15:13,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:13" (1/1) ... [2020-07-17 12:15:13,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72fafbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:13, skipping insertion in model container [2020-07-17 12:15:13,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:13" (1/1) ... [2020-07-17 12:15:13,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:15:13,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:15:14,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:14,025 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:15:14,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:14,082 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:15:14,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14 WrapperNode [2020-07-17 12:15:14,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:14,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:15:14,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:15:14,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:15:14,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (1/1) ... [2020-07-17 12:15:14,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (1/1) ... [2020-07-17 12:15:14,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (1/1) ... [2020-07-17 12:15:14,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (1/1) ... [2020-07-17 12:15:14,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (1/1) ... [2020-07-17 12:15:14,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (1/1) ... [2020-07-17 12:15:14,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (1/1) ... [2020-07-17 12:15:14,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:15:14,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:15:14,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:15:14,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:15:14,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (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 [2020-07-17 12:15:14,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:15:14,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:15:14,317 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:15:14,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:15:14,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:15:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:15:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:15:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:15:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:15:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:15:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 12:15:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:15:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 12:15:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 12:15:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:15:14,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:15:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:15:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:15:14,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:15:14,658 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:15:14,658 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 12:15:14,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:14 BoogieIcfgContainer [2020-07-17 12:15:14,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:15:14,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:15:14,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:15:14,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:15:14,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:15:13" (1/3) ... [2020-07-17 12:15:14,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e46643e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:14, skipping insertion in model container [2020-07-17 12:15:14,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:14" (2/3) ... [2020-07-17 12:15:14,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e46643e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:14, skipping insertion in model container [2020-07-17 12:15:14,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:14" (3/3) ... [2020-07-17 12:15:14,671 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-07-17 12:15:14,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:15:14,690 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:15:14,705 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:15:14,729 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:15:14,729 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:15:14,729 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:15:14,729 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:15:14,730 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:15:14,730 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:15:14,730 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:15:14,730 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:15:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-17 12:15:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:15:14,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:14,756 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] [2020-07-17 12:15:14,757 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:14,763 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-17 12:15:14,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:14,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327789614] [2020-07-17 12:15:14,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:14,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327789614] [2020-07-17 12:15:14,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:14,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:15:14,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387112158] [2020-07-17 12:15:14,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:15:14,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:14,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:15:14,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:15:14,990 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-17 12:15:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:15,097 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-17 12:15:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:15:15,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 12:15:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:15,108 INFO L225 Difference]: With dead ends: 54 [2020-07-17 12:15:15,108 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 12:15:15,113 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 [2020-07-17 12:15:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 12:15:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-17 12:15:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 12:15:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-17 12:15:15,158 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-17 12:15:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:15,158 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-17 12:15:15,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:15:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-17 12:15:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:15:15,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:15,160 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] [2020-07-17 12:15:15,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:15:15,161 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:15,162 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-17 12:15:15,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:15,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160686752] [2020-07-17 12:15:15,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:15,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160686752] [2020-07-17 12:15:15,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:15,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:15:15,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032964092] [2020-07-17 12:15:15,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:15:15,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:15:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:15:15,299 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-17 12:15:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:15,414 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-17 12:15:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:15:15,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-17 12:15:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:15,416 INFO L225 Difference]: With dead ends: 40 [2020-07-17 12:15:15,416 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 12:15:15,417 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 [2020-07-17 12:15:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 12:15:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-17 12:15:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 12:15:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-17 12:15:15,426 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-17 12:15:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:15,426 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-17 12:15:15,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:15:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-17 12:15:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:15:15,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:15,428 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] [2020-07-17 12:15:15,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:15:15,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-17 12:15:15,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:15,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018646620] [2020-07-17 12:15:15,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:15,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018646620] [2020-07-17 12:15:15,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520843174] [2020-07-17 12:15:15,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:15,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-17 12:15:15,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:16,046 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-17 12:15:16,047 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:16,066 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:16,067 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:15:16,067 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-17 12:15:16,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:16,121 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-17 12:15:16,123 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:16,139 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:16,140 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:15:16,140 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-17 12:15:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:16,399 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:16,399 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-17 12:15:16,402 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:16,439 INFO L624 ElimStorePlain]: treesize reduction 30, result has 63.4 percent of original size [2020-07-17 12:15:16,445 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-17 12:15:16,446 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:52 [2020-07-17 12:15:16,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:16,535 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:16,535 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2020-07-17 12:15:16,537 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:16,558 INFO L624 ElimStorePlain]: treesize reduction 18, result has 52.6 percent of original size [2020-07-17 12:15:16,559 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:15:16,559 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:59, output treesize:10 [2020-07-17 12:15:16,595 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:16,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:16,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-07-17 12:15:16,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031545334] [2020-07-17 12:15:16,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 12:15:16,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:16,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 12:15:16,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:15:16,651 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-07-17 12:15:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:17,405 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-17 12:15:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:15:17,406 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-07-17 12:15:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:17,409 INFO L225 Difference]: With dead ends: 49 [2020-07-17 12:15:17,409 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 12:15:17,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-07-17 12:15:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 12:15:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-17 12:15:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:15:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-17 12:15:17,418 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-17 12:15:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:17,419 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-17 12:15:17,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 12:15:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-17 12:15:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:15:17,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:17,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:17,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 12:15:17,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:17,636 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-17 12:15:17,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:17,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820711250] [2020-07-17 12:15:17,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:17,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820711250] [2020-07-17 12:15:17,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35624677] [2020-07-17 12:15:17,746 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:17,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:15:17,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:17,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:15:17,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:17,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:17,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-17 12:15:17,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527297044] [2020-07-17 12:15:17,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:15:17,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:15:17,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:15:17,862 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-17 12:15:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:18,111 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-17 12:15:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:15:18,111 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-17 12:15:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:18,113 INFO L225 Difference]: With dead ends: 45 [2020-07-17 12:15:18,113 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 12:15:18,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:15:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 12:15:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-17 12:15:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 12:15:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-17 12:15:18,122 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-17 12:15:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:18,122 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-17 12:15:18,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:15:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-17 12:15:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:15:18,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:18,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:18,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:18,339 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:18,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-17 12:15:18,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:18,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386686359] [2020-07-17 12:15:18,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:18,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386686359] [2020-07-17 12:15:18,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404359575] [2020-07-17 12:15:18,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:18,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-17 12:15:18,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:18,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:15:18,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:18,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:18,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-17 12:15:18,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6912947] [2020-07-17 12:15:18,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:15:18,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:15:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:15:18,530 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-17 12:15:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:18,704 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-17 12:15:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:15:18,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-17 12:15:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:18,705 INFO L225 Difference]: With dead ends: 49 [2020-07-17 12:15:18,705 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 12:15:18,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:15:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 12:15:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-17 12:15:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 12:15:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-17 12:15:18,717 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-17 12:15:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:18,717 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-17 12:15:18,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:15:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-17 12:15:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:15:18,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:18,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:18,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:18,922 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:18,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-17 12:15:18,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:18,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007746934] [2020-07-17 12:15:18,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:18,995 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:15:18,995 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:15:18,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:15:19,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:15:19 BoogieIcfgContainer [2020-07-17 12:15:19,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:15:19,035 INFO L168 Benchmark]: Toolchain (without parser) took 5238.58 ms. Allocated memory was 145.8 MB in the beginning and 245.4 MB in the end (delta: 99.6 MB). Free memory was 102.9 MB in the beginning and 180.0 MB in the end (delta: -77.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:19,036 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 12:15:19,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.13 ms. Allocated memory is still 145.8 MB. Free memory was 102.5 MB in the beginning and 92.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:19,038 INFO L168 Benchmark]: Boogie Preprocessor took 164.24 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 92.1 MB in the beginning and 178.8 MB in the end (delta: -86.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:19,038 INFO L168 Benchmark]: RCFGBuilder took 414.41 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 161.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:19,039 INFO L168 Benchmark]: TraceAbstraction took 4369.51 ms. Allocated memory was 201.3 MB in the beginning and 245.4 MB in the end (delta: 44.0 MB). Free memory was 161.6 MB in the beginning and 180.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:19,043 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.13 ms. Allocated memory is still 145.8 MB. Free memory was 102.5 MB in the beginning and 92.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 164.24 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 92.1 MB in the beginning and 178.8 MB in the end (delta: -86.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 414.41 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 161.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4369.51 ms. Allocated memory was 201.3 MB in the beginning and 245.4 MB in the end (delta: 44.0 MB). Free memory was 161.6 MB in the beginning and 180.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 25.7 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=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [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=2, sum={7:0}] [L30] COND TRUE i