/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:03:55,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:03:55,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:03:55,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:03:55,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:03:55,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:03:55,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:03:55,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:03:55,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:03:55,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:03:55,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:03:55,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:03:55,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:03:55,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:03:55,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:03:55,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:03:55,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:03:55,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:03:55,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:03:56,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:03:56,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:03:56,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:03:56,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:03:56,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:03:56,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 06:03:56,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 06:03:56,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 06:03:56,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 06:03:56,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 06:03:56,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 06:03:56,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 06:03:56,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 06:03:56,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 06:03:56,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 06:03:56,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 06:03:56,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 06:03:56,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 06:03:56,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 06:03:56,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:03:56,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:03:56,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:03:56,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 06:03:56,070 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:03:56,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:03:56,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:03:56,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:03:56,073 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:03:56,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:03:56,074 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:03:56,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:03:56,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:03:56,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:03:56,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:03:56,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:03:56,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:03:56,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:03:56,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:03:56,076 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:03:56,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:03:56,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:03:56,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:03:56,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:03:56,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:03:56,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:03:56,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:03:56,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:03:56,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:03:56,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:03:56,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:03:56,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:03:56,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:03:56,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:03:56,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:03:56,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:03:56,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:03:56,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:03:56,566 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:03:56,567 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-20 06:03:56,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeeafebcc/c637e31aa9b74138b30ac1eb183f3f57/FLAG2c3d5312d [2020-07-20 06:03:57,317 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:03:57,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-20 06:03:57,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeeafebcc/c637e31aa9b74138b30ac1eb183f3f57/FLAG2c3d5312d [2020-07-20 06:03:57,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeeafebcc/c637e31aa9b74138b30ac1eb183f3f57 [2020-07-20 06:03:57,587 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:03:57,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:03:57,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:03:57,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:03:57,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:03:57,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:57,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed27642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57, skipping insertion in model container [2020-07-20 06:03:57,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:57,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:03:57,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:03:57,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:03:57,881 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:03:57,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:03:57,929 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:03:57,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57 WrapperNode [2020-07-20 06:03:57,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:03:57,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:03:57,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:03:57,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:03:57,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:57,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:58,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:58,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:58,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:58,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:58,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (1/1) ... [2020-07-20 06:03:58,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:03:58,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:03:58,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:03:58,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:03:58,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:03:58,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:03:58,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:03:58,190 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:03:58,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:03:58,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:03:58,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:03:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:03:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:03:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:03:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:03:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 06:03:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:03:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 06:03:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 06:03:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:03:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:03:58,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:03:58,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:03:58,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:03:58,609 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:03:58,610 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 06:03:58,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:03:58 BoogieIcfgContainer [2020-07-20 06:03:58,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:03:58,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:03:58,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:03:58,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:03:58,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:03:57" (1/3) ... [2020-07-20 06:03:58,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b32976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:03:58, skipping insertion in model container [2020-07-20 06:03:58,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:57" (2/3) ... [2020-07-20 06:03:58,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b32976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:03:58, skipping insertion in model container [2020-07-20 06:03:58,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:03:58" (3/3) ... [2020-07-20 06:03:58,629 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-07-20 06:03:58,641 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:03:58,650 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:03:58,668 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:03:58,701 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:03:58,702 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:03:58,702 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:03:58,702 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:03:58,702 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:03:58,702 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:03:58,703 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:03:58,703 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:03:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 06:03:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 06:03:58,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:58,740 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] [2020-07-20 06:03:58,741 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-20 06:03:58,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:58,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819429745] [2020-07-20 06:03:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c344c62 [2020-07-20 06:03:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:03:59,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819429745] [2020-07-20 06:03:59,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:03:59,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:03:59,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868867805] [2020-07-20 06:03:59,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:03:59,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:59,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:03:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:03:59,140 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-07-20 06:03:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:59,311 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-20 06:03:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:03:59,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 06:03:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:59,327 INFO L225 Difference]: With dead ends: 56 [2020-07-20 06:03:59,328 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 06:03:59,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:03:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 06:03:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 06:03:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 06:03:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-20 06:03:59,385 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-07-20 06:03:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:59,386 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-20 06:03:59,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:03:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-20 06:03:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 06:03:59,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:59,389 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] [2020-07-20 06:03:59,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:03:59,389 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:59,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-20 06:03:59,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:59,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116400936] [2020-07-20 06:03:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c344c62 [2020-07-20 06:03:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:03:59,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116400936] [2020-07-20 06:03:59,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:03:59,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:03:59,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076875140] [2020-07-20 06:03:59,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:03:59,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:59,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:03:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:03:59,575 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-07-20 06:03:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:59,773 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-20 06:03:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:03:59,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 06:03:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:59,776 INFO L225 Difference]: With dead ends: 45 [2020-07-20 06:03:59,776 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 06:03:59,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:03:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 06:03:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 06:03:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 06:03:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 06:03:59,811 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-07-20 06:03:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:59,812 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 06:03:59,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:03:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 06:03:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 06:03:59,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:59,817 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] [2020-07-20 06:03:59,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:03:59,818 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:59,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:59,820 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-20 06:03:59,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:59,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147928737] [2020-07-20 06:03:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c344c62 [2020-07-20 06:03:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 06:04:00,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147928737] [2020-07-20 06:04:00,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:04:00,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 06:04:00,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257037961] [2020-07-20 06:04:00,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:04:00,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:00,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:04:00,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:04:00,075 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-07-20 06:04:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:00,380 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-07-20 06:04:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:04:00,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-20 06:04:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:00,383 INFO L225 Difference]: With dead ends: 39 [2020-07-20 06:04:00,383 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 06:04:00,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:04:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 06:04:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-20 06:04:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 06:04:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 06:04:00,394 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-20 06:04:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:00,395 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 06:04:00,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:04:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 06:04:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 06:04:00,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:00,397 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, 1, 1] [2020-07-20 06:04:00,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 06:04:00,397 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:00,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-07-20 06:04:00,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:00,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831069516] [2020-07-20 06:04:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c344c62 [2020-07-20 06:04:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:04:00,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831069516] [2020-07-20 06:04:00,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268433178] [2020-07-20 06:04:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52a44464 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:00,617 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52a44464 issued 4 check-sat command(s) [2020-07-20 06:04:00,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:04:00,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 06:04:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:04:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:04:00,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:04:00,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 06:04:00,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720508511] [2020-07-20 06:04:00,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 06:04:00,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 06:04:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:04:00,740 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2020-07-20 06:04:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:00,998 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-07-20 06:04:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 06:04:00,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-20 06:04:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:01,001 INFO L225 Difference]: With dead ends: 55 [2020-07-20 06:04:01,001 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 06:04:01,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:04:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 06:04:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-20 06:04:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 06:04:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 06:04:01,013 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-07-20 06:04:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:01,013 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 06:04:01,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 06:04:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 06:04:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 06:04:01,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:01,015 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-07-20 06:04:01,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:01,230 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:01,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:01,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-20 06:04:01,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:01,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278821002] [2020-07-20 06:04:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c344c62 [2020-07-20 06:04:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:04:01,322 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:04:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:04:01,411 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:04:01,461 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 06:04:01,462 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 06:04:01,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 06:04:01,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:04:01 BoogieIcfgContainer [2020-07-20 06:04:01,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:04:01,525 INFO L168 Benchmark]: Toolchain (without parser) took 3934.16 ms. Allocated memory was 145.2 MB in the beginning and 235.9 MB in the end (delta: 90.7 MB). Free memory was 103.0 MB in the beginning and 128.8 MB in the end (delta: -25.8 MB). Peak memory consumption was 64.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:01,526 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 06:04:01,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.64 ms. Allocated memory is still 145.2 MB. Free memory was 102.5 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:01,528 INFO L168 Benchmark]: Boogie Preprocessor took 167.41 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 92.2 MB in the beginning and 181.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:01,529 INFO L168 Benchmark]: RCFGBuilder took 517.68 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 164.0 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:01,530 INFO L168 Benchmark]: TraceAbstraction took 2902.52 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 163.4 MB in the beginning and 128.8 MB in the end (delta: 34.6 MB). Peak memory consumption was 67.1 MB. Max. memory is 7.1 GB. [2020-07-20 06:04:01,535 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 337.64 ms. Allocated memory is still 145.2 MB. Free memory was 102.5 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 167.41 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 92.2 MB in the beginning and 181.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 517.68 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 164.0 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2902.52 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 163.4 MB in the beginning and 128.8 MB in the end (delta: 34.6 MB). Peak memory consumption was 67.1 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)=32, 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] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L29] COND TRUE i