/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-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:03:48,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:03:48,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:03:48,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:03:48,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:03:48,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:03:48,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:03:48,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:03:48,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:03:48,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:03:48,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:03:48,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:03:48,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:03:48,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:03:48,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:03:48,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:03:48,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:03:48,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:03:48,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:03:48,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:03:48,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:03:48,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:03:48,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:03:48,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:03:48,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:03:48,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:03:48,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:03:48,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:03:48,933 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 06:03:48,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:03:48,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:03:48,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:03:48,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:03:48,965 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:03:48,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:03:48,965 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:03:48,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:03:48,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:03:48,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:03:48,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:03:48,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:03:48,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:03:48,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:03:48,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:03:48,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:03:48,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:03:48,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:03:48,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:03:48,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:03:48,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:03:48,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:03:48,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:03:48,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:03:48,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:03:48,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:03:48,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:03:48,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:03:48,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:03:48,972 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 06:03:49,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:03:49,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:03:49,310 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:03:49,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:03:49,312 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:03:49,313 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-07-20 06:03:49,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fa4cb464/ca8d164ab36f4e1c91204052502fab81/FLAG3a85f687d [2020-07-20 06:03:49,839 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:03:49,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skippedu.c [2020-07-20 06:03:49,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fa4cb464/ca8d164ab36f4e1c91204052502fab81/FLAG3a85f687d [2020-07-20 06:03:50,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fa4cb464/ca8d164ab36f4e1c91204052502fab81 [2020-07-20 06:03:50,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:03:50,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:03:50,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:03:50,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:03:50,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:03:50,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc33ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50, skipping insertion in model container [2020-07-20 06:03:50,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:03:50,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:03:50,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:03:50,460 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:03:50,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:03:50,495 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:03:50,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50 WrapperNode [2020-07-20 06:03:50,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:03:50,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:03:50,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:03:50,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:03:50,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (1/1) ... [2020-07-20 06:03:50,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:03:50,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:03:50,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:03:50,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:03:50,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (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 06:03:50,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:03:50,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:03:50,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:03:50,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:03:50,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:03:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:03:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:03:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:03:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:03:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:03:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 06:03:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:03:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 06:03:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:03:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:03:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:03:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:03:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:03:50,996 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:03:50,996 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 06:03:51,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:03:51 BoogieIcfgContainer [2020-07-20 06:03:51,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:03:51,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:03:51,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:03:51,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:03:51,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:03:50" (1/3) ... [2020-07-20 06:03:51,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f33907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:03:51, skipping insertion in model container [2020-07-20 06:03:51,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:50" (2/3) ... [2020-07-20 06:03:51,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f33907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:03:51, skipping insertion in model container [2020-07-20 06:03:51,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:03:51" (3/3) ... [2020-07-20 06:03:51,010 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-07-20 06:03:51,022 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:03:51,031 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:03:51,049 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:03:51,078 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:03:51,078 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:03:51,079 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:03:51,079 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:03:51,079 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:03:51,079 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:03:51,079 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:03:51,079 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:03:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 06:03:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 06:03:51,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:51,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:51,119 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash -978746934, now seen corresponding path program 1 times [2020-07-20 06:03:51,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:51,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517314333] [2020-07-20 06:03:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a066431 [2020-07-20 06:03:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,519 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 06:03:51,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517314333] [2020-07-20 06:03:51,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:03:51,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:03:51,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042352575] [2020-07-20 06:03:51,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:03:51,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:51,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:03:51,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:03:51,554 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-07-20 06:03:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:51,758 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-07-20 06:03:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:03:51,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 06:03:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:51,769 INFO L225 Difference]: With dead ends: 67 [2020-07-20 06:03:51,770 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 06:03:51,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:03:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 06:03:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-20 06:03:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 06:03:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 06:03:51,816 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 06:03:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:51,817 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 06:03:51,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:03:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 06:03:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 06:03:51,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:51,819 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] [2020-07-20 06:03:51,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:03:51,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1791807978, now seen corresponding path program 1 times [2020-07-20 06:03:51,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:51,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407135462] [2020-07-20 06:03:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a066431 [2020-07-20 06:03:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:03:51,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407135462] [2020-07-20 06:03:51,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964049428] [2020-07-20 06:03:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f9ef31f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:51,992 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f9ef31f issued 2 check-sat command(s) [2020-07-20 06:03:51,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 06:03:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:03:52,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:03:52,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-07-20 06:03:52,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928267062] [2020-07-20 06:03:52,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:03:52,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:52,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:03:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:03:52,071 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-20 06:03:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:52,233 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-07-20 06:03:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:03:52,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-20 06:03:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:52,235 INFO L225 Difference]: With dead ends: 59 [2020-07-20 06:03:52,235 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 06:03:52,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:03:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 06:03:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 06:03:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 06:03:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 06:03:52,245 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2020-07-20 06:03:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:52,245 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 06:03:52,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:03:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 06:03:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 06:03:52,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:52,247 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] [2020-07-20 06:03:52,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:03:52,462 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:52,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2002160904, now seen corresponding path program 2 times [2020-07-20 06:03:52,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:52,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842744803] [2020-07-20 06:03:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a066431 [2020-07-20 06:03:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 06:03:52,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842744803] [2020-07-20 06:03:52,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:03:52,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 06:03:52,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785051621] [2020-07-20 06:03:52,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:03:52,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:03:52,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:03:52,686 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-07-20 06:03:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:52,848 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-07-20 06:03:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:03:52,849 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-07-20 06:03:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:52,850 INFO L225 Difference]: With dead ends: 51 [2020-07-20 06:03:52,850 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 06:03:52,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:03:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 06:03:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-07-20 06:03:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 06:03:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-20 06:03:52,860 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2020-07-20 06:03:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:52,860 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-20 06:03:52,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:03:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-20 06:03:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 06:03:52,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:52,862 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, 1] [2020-07-20 06:03:52,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 06:03:52,862 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash -709829620, now seen corresponding path program 1 times [2020-07-20 06:03:52,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:52,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900937962] [2020-07-20 06:03:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a066431 [2020-07-20 06:03:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 06:03:53,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900937962] [2020-07-20 06:03:53,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112794826] [2020-07-20 06:03:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30824803 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:53,233 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30824803 issued 4 check-sat command(s) [2020-07-20 06:03:53,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 06:03:53,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:53,352 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 20 treesize of output 16 [2020-07-20 06:03:53,353 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 06:03:53,364 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 06:03:53,365 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 06:03:53,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-07-20 06:03:53,420 INFO L350 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2020-07-20 06:03:53,421 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2020-07-20 06:03:53,422 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 06:03:53,434 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 06:03:53,435 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 06:03:53,436 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-07-20 06:03:53,606 INFO L350 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-07-20 06:03:53,607 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2020-07-20 06:03:53,609 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 06:03:53,611 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:03:53,615 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 06:03:53,630 INFO L624 ElimStorePlain]: treesize reduction 31, result has 18.4 percent of original size [2020-07-20 06:03:53,631 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 06:03:53,631 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:7 [2020-07-20 06:03:53,634 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:03:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 06:03:53,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:03:53,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2020-07-20 06:03:53,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107643318] [2020-07-20 06:03:53,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 06:03:53,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:53,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 06:03:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-07-20 06:03:53,677 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 21 states. [2020-07-20 06:03:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:54,728 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-07-20 06:03:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 06:03:54,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-07-20 06:03:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:54,732 INFO L225 Difference]: With dead ends: 96 [2020-07-20 06:03:54,732 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 06:03:54,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 06:03:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 06:03:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 49. [2020-07-20 06:03:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 06:03:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-20 06:03:54,750 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2020-07-20 06:03:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:54,751 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-20 06:03:54,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 06:03:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-20 06:03:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 06:03:54,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:54,752 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, 1] [2020-07-20 06:03:54,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:54,966 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash -8765042, now seen corresponding path program 1 times [2020-07-20 06:03:54,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:54,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292532759] [2020-07-20 06:03:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a066431 [2020-07-20 06:03:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:03:54,995 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:03:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:03:55,036 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:03:55,090 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 06:03:55,090 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 06:03:55,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 06:03:55,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:03:55 BoogieIcfgContainer [2020-07-20 06:03:55,175 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:03:55,179 INFO L168 Benchmark]: Toolchain (without parser) took 4945.57 ms. Allocated memory was 138.9 MB in the beginning and 244.8 MB in the end (delta: 105.9 MB). Free memory was 103.1 MB in the beginning and 178.1 MB in the end (delta: -75.0 MB). Peak memory consumption was 30.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:55,181 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory is still 121.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 06:03:55,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.40 ms. Allocated memory is still 138.9 MB. Free memory was 102.7 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:55,185 INFO L168 Benchmark]: Boogie Preprocessor took 143.12 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 180.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:55,188 INFO L168 Benchmark]: RCFGBuilder took 361.92 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 162.3 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:55,192 INFO L168 Benchmark]: TraceAbstraction took 4172.75 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 162.3 MB in the beginning and 178.1 MB in the end (delta: -15.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:55,201 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory is still 121.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.40 ms. Allocated memory is still 138.9 MB. Free memory was 102.7 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.12 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 180.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.92 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 162.3 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4172.75 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 162.3 MB in the beginning and 178.1 MB in the end (delta: -15.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int SIZE; [L12] const int MAX = 100000; VAL [\old(MAX)=100003, \old(SIZE)=100002, MAX=100000, SIZE=0] [L16] SIZE = __VERIFIER_nondet_int() [L17] COND TRUE SIZE > 1 && SIZE < MAX [L19] int i; [L20] int *a = malloc(sizeof(int)*SIZE); [L22] i = 0 VAL [\old(SIZE)=0, a={-1:0}, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND FALSE !(i < SIZE) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L27] COND FALSE !(SIZE % 2 != 0) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L29] CALL assume_abort_if_not(SIZE % 2 == 0) VAL [\old(cond)=1, \old(SIZE)=0, MAX=100000, SIZE=2] [L4] COND FALSE !(!cond) VAL [\old(cond)=1, \old(SIZE)=0, cond=1, MAX=100000, SIZE=2] [L29] RET assume_abort_if_not(SIZE % 2 == 0) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] i = 1 VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] COND TRUE i <= SIZE/2 [L32] EXPR a[2*i-2] VAL [\old(SIZE)=0, a={-1:0}, a[2*i-2]=1, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L32] COND FALSE !(a[2*i-2] > i) [L36] EXPR a[2*i-1] VAL [\old(SIZE)=0, a={-1:0}, a[2*i-1]=5, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L36] COND TRUE a[2*i-1] > i [L38] a[2*i-1] = 2*i-1 VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] i++ VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] COND FALSE !(i <= SIZE/2) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L42] i = 0 VAL [\old(SIZE)=0, a={-1:0}, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L42] COND TRUE i < SIZE [L44] EXPR a[i] VAL [\old(SIZE)=0, a={-1:0}, a[i]=1, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L44] CALL __VERIFIER_assert( a[i] <= i ) VAL [\old(cond)=0, \old(SIZE)=0, MAX=100000, SIZE=2] [L6] COND TRUE !(cond) VAL [\old(cond)=0, \old(SIZE)=0, cond=0, MAX=100000, SIZE=2] [L6] __VERIFIER_error() VAL [\old(cond)=0, \old(SIZE)=0, cond=0, MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 112 SDtfs, 260 SDslu, 131 SDs, 0 SdLazy, 718 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 51 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 189 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 19622 SizeOfPredicates, 10 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...