/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/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:04:12,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:04:12,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:04:12,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:04:12,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:04:12,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:04:12,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:04:12,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:04:12,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:04:12,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:04:12,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:04:12,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:04:12,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:04:12,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:04:12,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:04:12,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:04:12,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:04:12,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:04:12,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:04:12,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:04:12,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:04:12,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:04:12,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:04:12,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:04:12,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:04:12,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:04:12,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:04:12,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:04:12,530 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 06:04:12,549 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:04:12,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:04:12,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:04:12,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:04:12,551 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:04:12,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:04:12,551 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:04:12,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:04:12,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:04:12,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:04:12,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:04:12,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:04:12,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:04:12,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:04:12,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:04:12,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:04:12,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:04:12,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:04:12,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:04:12,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:04:12,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:04:12,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:04:12,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:04:12,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:04:12,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:04:12,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:04:12,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:04:12,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:04:12,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:04:12,555 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 06:04:12,878 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:04:12,893 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:04:12,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:04:12,899 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:04:12,899 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:04:12,900 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 06:04:12,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f258f189/08f9f2f3dbde49b7b9377d4e4c891a8a/FLAGb1b882b17 [2020-07-20 06:04:13,444 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:04:13,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 06:04:13,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f258f189/08f9f2f3dbde49b7b9377d4e4c891a8a/FLAGb1b882b17 [2020-07-20 06:04:13,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f258f189/08f9f2f3dbde49b7b9377d4e4c891a8a [2020-07-20 06:04:13,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:04:13,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:04:13,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:04:13,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:04:13,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:04:13,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:04:13" (1/1) ... [2020-07-20 06:04:13,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5289b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:13, skipping insertion in model container [2020-07-20 06:04:13,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:04:13" (1/1) ... [2020-07-20 06:04:13,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:04:13,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:04:14,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:04:14,176 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:04:14,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:04:14,226 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:04:14,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14 WrapperNode [2020-07-20 06:04:14,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:04:14,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:04:14,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:04:14,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:04:14,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (1/1) ... [2020-07-20 06:04:14,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (1/1) ... [2020-07-20 06:04:14,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (1/1) ... [2020-07-20 06:04:14,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (1/1) ... [2020-07-20 06:04:14,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (1/1) ... [2020-07-20 06:04:14,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (1/1) ... [2020-07-20 06:04:14,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (1/1) ... [2020-07-20 06:04:14,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:04:14,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:04:14,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:04:14,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:04:14,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:04:14,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:04:14,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:04:14,453 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:04:14,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:04:14,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:04:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:04:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:04:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:04:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:04:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:04:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 06:04:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:04:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 06:04:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:04:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:04:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:04:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:04:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:04:14,963 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:04:14,964 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 06:04:14,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:04:14 BoogieIcfgContainer [2020-07-20 06:04:14,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:04:14,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:04:14,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:04:14,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:04:14,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:04:13" (1/3) ... [2020-07-20 06:04:14,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f078b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:04:14, skipping insertion in model container [2020-07-20 06:04:14,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:04:14" (2/3) ... [2020-07-20 06:04:14,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f078b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:04:14, skipping insertion in model container [2020-07-20 06:04:14,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:04:14" (3/3) ... [2020-07-20 06:04:14,979 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-07-20 06:04:14,989 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:04:14,998 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:04:15,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:04:15,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:04:15,038 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:04:15,038 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:04:15,038 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:04:15,039 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:04:15,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:04:15,039 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:04:15,039 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:04:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 06:04:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 06:04:15,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:15,066 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 06:04:15,067 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-07-20 06:04:15,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:15,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610116150] [2020-07-20 06:04:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@523d3964 [2020-07-20 06:04:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:04:15,320 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 06:04:15,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610116150] [2020-07-20 06:04:15,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:04:15,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:04:15,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719369302] [2020-07-20 06:04:15,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:04:15,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:04:15,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:04:15,349 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-07-20 06:04:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:15,533 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2020-07-20 06:04:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:04:15,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 06:04:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:15,547 INFO L225 Difference]: With dead ends: 70 [2020-07-20 06:04:15,547 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 06:04:15,555 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 06:04:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 06:04:15,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 06:04:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 06:04:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-20 06:04:15,600 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2020-07-20 06:04:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:15,601 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-20 06:04:15,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:04:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-20 06:04:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 06:04:15,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:15,603 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 06:04:15,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:04:15,604 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash -544938994, now seen corresponding path program 1 times [2020-07-20 06:04:15,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:15,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809929173] [2020-07-20 06:04:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@523d3964 [2020-07-20 06:04:15,642 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:15,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078225557] [2020-07-20 06:04:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ee5146c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:15,723 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ee5146c issued 2 check-sat command(s) [2020-07-20 06:04:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:04:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:04:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:04:15,783 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 06:04:15,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809929173] [2020-07-20 06:04:15,784 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:04:15,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078225557] [2020-07-20 06:04:15,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:04:15,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:04:15,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337602076] [2020-07-20 06:04:15,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:04:15,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:15,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:04:15,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:04:15,794 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-07-20 06:04:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:15,967 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2020-07-20 06:04:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:04:15,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 06:04:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:15,975 INFO L225 Difference]: With dead ends: 67 [2020-07-20 06:04:15,975 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 06:04:15,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:04:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 06:04:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-20 06:04:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 06:04:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-20 06:04:16,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-07-20 06:04:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:16,010 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-20 06:04:16,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:04:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-20 06:04:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 06:04:16,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:16,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:04:16,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:04:16,219 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:16,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-07-20 06:04:16,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:16,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103890531] [2020-07-20 06:04:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@523d3964 [2020-07-20 06:04:16,266 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:16,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775617491] [2020-07-20 06:04:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d276e4e 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 06:04:16,370 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d276e4e issued 4 check-sat command(s) [2020-07-20 06:04:16,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:04:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:04:16,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:04:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:04:16,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103890531] [2020-07-20 06:04:16,396 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:04:16,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775617491] [2020-07-20 06:04:16,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:04:16,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:04:16,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748947249] [2020-07-20 06:04:16,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:04:16,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:04:16,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:04:16,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:04:16,401 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-07-20 06:04:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:04:16,499 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-07-20 06:04:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:04:16,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-20 06:04:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:04:16,501 INFO L225 Difference]: With dead ends: 72 [2020-07-20 06:04:16,502 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 06:04:16,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 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 06:04:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 06:04:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-20 06:04:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 06:04:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-20 06:04:16,514 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2020-07-20 06:04:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:04:16,514 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-20 06:04:16,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:04:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-20 06:04:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 06:04:16,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:04:16,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:04:16,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:04:16,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:04:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:04:16,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-07-20 06:04:16,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:04:16,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418275807] [2020-07-20 06:04:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@523d3964 [2020-07-20 06:04:16,782 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:04:16,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314818902] [2020-07-20 06:04:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5520ccb2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true