/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:45:30,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:45:30,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:45:30,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:45:30,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:45:30,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:45:30,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:45:30,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:45:30,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:45:30,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:45:30,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:45:30,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:45:30,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:45:30,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:45:30,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:45:30,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:45:30,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:45:30,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:45:30,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:45:30,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:45:30,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:45:30,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:45:30,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:45:30,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:45:30,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:45:30,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:45:30,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:45:30,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:45:30,530 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 11:45:30,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:45:30,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:45:30,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:45:30,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:45:30,547 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:45:30,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:45:30,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:45:30,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:45:30,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:45:30,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:45:30,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:45:30,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:45:30,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:45:30,549 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:45:30,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:45:30,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:45:30,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:45:30,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:45:30,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:45:30,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:45:30,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:45:30,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:45:30,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:45:30,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:45:30,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:45:30,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:45:30,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:30,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:45:30,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:45:30,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:45:30,821 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:45:30,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:45:30,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:45:30,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:45:30,844 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:45:30,845 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 11:45:30,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58dfc2c74/349c7c0e21f242a2bb0b1a9ffc6f8a96/FLAG494e1047f [2020-07-20 11:45:31,402 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:45:31,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 11:45:31,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58dfc2c74/349c7c0e21f242a2bb0b1a9ffc6f8a96/FLAG494e1047f [2020-07-20 11:45:31,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58dfc2c74/349c7c0e21f242a2bb0b1a9ffc6f8a96 [2020-07-20 11:45:31,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:45:31,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:45:31,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:45:31,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:45:31,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:45:31,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:31,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e523c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31, skipping insertion in model container [2020-07-20 11:45:31,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:31,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:45:31,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:45:31,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:45:31,994 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:45:32,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:45:32,036 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:45:32,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32 WrapperNode [2020-07-20 11:45:32,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:45:32,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:45:32,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:45:32,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:45:32,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (1/1) ... [2020-07-20 11:45:32,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (1/1) ... [2020-07-20 11:45:32,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (1/1) ... [2020-07-20 11:45:32,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (1/1) ... [2020-07-20 11:45:32,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (1/1) ... [2020-07-20 11:45:32,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (1/1) ... [2020-07-20 11:45:32,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (1/1) ... [2020-07-20 11:45:32,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:45:32,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:45:32,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:45:32,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:45:32,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (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 11:45:32,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:45:32,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:45:32,246 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 11:45:32,246 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 11:45:32,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:45:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:45:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:45:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 11:45:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:45:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 11:45:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:45:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:45:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:45:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:45:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:45:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:45:32,623 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:45:32,623 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:45:32,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:45:32 BoogieIcfgContainer [2020-07-20 11:45:32,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:45:32,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:45:32,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:45:32,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:45:32,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:45:31" (1/3) ... [2020-07-20 11:45:32,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658bd02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:45:32, skipping insertion in model container [2020-07-20 11:45:32,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:32" (2/3) ... [2020-07-20 11:45:32,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658bd02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:45:32, skipping insertion in model container [2020-07-20 11:45:32,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:45:32" (3/3) ... [2020-07-20 11:45:32,634 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-20 11:45:32,642 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:45:32,650 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:45:32,664 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:45:32,691 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:45:32,691 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:45:32,692 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:45:32,692 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:45:32,692 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:45:32,692 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:45:32,692 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:45:32,692 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:45:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-20 11:45:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 11:45:32,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:32,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 11:45:32,716 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-20 11:45:32,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:32,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369608634] [2020-07-20 11:45:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:45:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:45:32,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:32,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369608634] [2020-07-20 11:45:32,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:32,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:45:32,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209774095] [2020-07-20 11:45:32,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:45:32,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:45:32,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:45:32,924 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-07-20 11:45:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:32,952 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-07-20 11:45:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:45:32,953 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-07-20 11:45:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:32,964 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:45:32,964 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:45:32,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:45:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:45:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 11:45:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:45:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-20 11:45:33,017 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2020-07-20 11:45:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:33,018 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-20 11:45:33,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:45:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-20 11:45:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 11:45:33,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:33,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 11:45:33,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:33,238 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:33,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1240892162, now seen corresponding path program 1 times [2020-07-20 11:45:33,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:33,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235985200] [2020-07-20 11:45:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:33,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:33,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 11:45:33,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:33,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235985200] [2020-07-20 11:45:33,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:33,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:45:33,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534549042] [2020-07-20 11:45:33,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:45:33,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:33,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:45:33,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:45:33,351 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-20 11:45:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:33,610 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-07-20 11:45:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:45:33,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-20 11:45:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:33,614 INFO L225 Difference]: With dead ends: 57 [2020-07-20 11:45:33,615 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 11:45:33,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 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 11:45:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 11:45:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 11:45:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 11:45:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-20 11:45:33,627 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-20 11:45:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:33,627 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-20 11:45:33,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:45:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-20 11:45:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 11:45:33,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:33,630 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 11:45:33,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:33,842 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-20 11:45:33,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:33,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624406641] [2020-07-20 11:45:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:33,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:33,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:45:33,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:33,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624406641] [2020-07-20 11:45:33,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:33,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:45:33,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321014498] [2020-07-20 11:45:33,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:45:33,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:33,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:45:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:45:33,964 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2020-07-20 11:45:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:34,037 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-20 11:45:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:45:34,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-07-20 11:45:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:34,039 INFO L225 Difference]: With dead ends: 65 [2020-07-20 11:45:34,040 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 11:45:34,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 1 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 11:45:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 11:45:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 11:45:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 11:45:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 11:45:34,059 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-20 11:45:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:34,059 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 11:45:34,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:45:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 11:45:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 11:45:34,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:34,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 11:45:34,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:34,275 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:34,276 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-07-20 11:45:34,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:34,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980010085] [2020-07-20 11:45:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:45:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:45:34,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:45:34,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980010085] [2020-07-20 11:45:34,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:34,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-20 11:45:34,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137475419] [2020-07-20 11:45:34,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:45:34,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:34,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:45:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:45:34,499 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 8 states. [2020-07-20 11:45:34,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:34,606 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-20 11:45:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:45:34,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-07-20 11:45:34,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:34,608 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:45:34,609 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 11:45:34,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:45:34,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 11:45:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-07-20 11:45:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:45:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-20 11:45:34,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-07-20 11:45:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:34,617 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-20 11:45:34,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:45:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-20 11:45:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 11:45:34,619 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:34,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:45:34,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:34,833 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times [2020-07-20 11:45:34,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:34,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122917272] [2020-07-20 11:45:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:34,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:45:34,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:34,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122917272] [2020-07-20 11:45:34,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:34,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:45:34,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103631129] [2020-07-20 11:45:34,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:45:34,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:45:34,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:45:34,926 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-07-20 11:45:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:34,993 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-07-20 11:45:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:45:34,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-07-20 11:45:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:34,995 INFO L225 Difference]: With dead ends: 65 [2020-07-20 11:45:34,995 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 11:45:34,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 1 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 11:45:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 11:45:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-07-20 11:45:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 11:45:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-20 11:45:35,004 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2020-07-20 11:45:35,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:35,005 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-20 11:45:35,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:45:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-20 11:45:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 11:45:35,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:35,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:45:35,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:35,221 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:35,222 INFO L82 PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times [2020-07-20 11:45:35,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:35,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533921862] [2020-07-20 11:45:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:45:35,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-20 11:45:35,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 11:45:35,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533921862] [2020-07-20 11:45:35,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:35,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-20 11:45:35,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958911564] [2020-07-20 11:45:35,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:45:35,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:35,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:45:35,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:45:35,417 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-07-20 11:45:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:35,540 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-20 11:45:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:45:35,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-20 11:45:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:35,542 INFO L225 Difference]: With dead ends: 70 [2020-07-20 11:45:35,542 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 11:45:35,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:45:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 11:45:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-20 11:45:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:45:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-20 11:45:35,551 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51 [2020-07-20 11:45:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:35,552 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-20 11:45:35,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:45:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-20 11:45:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-20 11:45:35,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:35,556 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:45:35,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:35,771 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times [2020-07-20 11:45:35,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:35,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276401303] [2020-07-20 11:45:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:35,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 11:45:35,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:35,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276401303] [2020-07-20 11:45:35,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:35,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:45:35,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567160436] [2020-07-20 11:45:35,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:45:35,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:45:35,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:45:35,867 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 4 states. [2020-07-20 11:45:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:35,927 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-07-20 11:45:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:45:35,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-20 11:45:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:35,929 INFO L225 Difference]: With dead ends: 69 [2020-07-20 11:45:35,929 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:45:35,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 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 11:45:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:45:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 11:45:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:45:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 11:45:35,936 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60 [2020-07-20 11:45:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:35,936 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 11:45:35,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:45:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 11:45:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 11:45:35,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:35,938 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 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, 1] [2020-07-20 11:45:36,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:36,152 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:36,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times [2020-07-20 11:45:36,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:36,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102278488] [2020-07-20 11:45:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:36,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 11:45:36,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 11:45:36,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:36,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102278488] [2020-07-20 11:45:36,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:36,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 11:45:36,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788972978] [2020-07-20 11:45:36,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:45:36,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:45:36,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:45:36,332 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2020-07-20 11:45:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:36,390 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-20 11:45:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:45:36,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-20 11:45:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:36,392 INFO L225 Difference]: With dead ends: 74 [2020-07-20 11:45:36,392 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 11:45:36,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:45:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 11:45:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-20 11:45:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 11:45:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-20 11:45:36,403 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-20 11:45:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:36,403 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-20 11:45:36,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:45:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-20 11:45:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 11:45:36,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:36,406 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:45:36,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:36,620 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-20 11:45:36,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:36,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293771927] [2020-07-20 11:45:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:36,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:45:36,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 11:45:36,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 11:45:36,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293771927] [2020-07-20 11:45:36,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:36,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 11:45:36,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646363737] [2020-07-20 11:45:36,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:45:36,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:36,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:45:36,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:45:36,930 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states. [2020-07-20 11:45:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:37,139 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2020-07-20 11:45:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:45:37,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 11:45:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:37,141 INFO L225 Difference]: With dead ends: 139 [2020-07-20 11:45:37,141 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 11:45:37,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:45:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 11:45:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-20 11:45:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 11:45:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-07-20 11:45:37,154 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 65 [2020-07-20 11:45:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:37,154 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-07-20 11:45:37,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:45:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-07-20 11:45:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 11:45:37,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:37,156 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2020-07-20 11:45:37,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:37,368 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-20 11:45:37,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:37,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495916026] [2020-07-20 11:45:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:45:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 11:45:37,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 11:45:37,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495916026] [2020-07-20 11:45:37,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:37,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 11:45:37,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684049699] [2020-07-20 11:45:37,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:45:37,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:45:37,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:45:37,668 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 13 states. [2020-07-20 11:45:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:37,930 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2020-07-20 11:45:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:45:37,931 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-07-20 11:45:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:37,933 INFO L225 Difference]: With dead ends: 129 [2020-07-20 11:45:37,933 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 11:45:37,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:45:37,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 11:45:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2020-07-20 11:45:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 11:45:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-07-20 11:45:37,963 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 67 [2020-07-20 11:45:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:37,964 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-07-20 11:45:37,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:45:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-07-20 11:45:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 11:45:37,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:37,967 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 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 11:45:38,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:38,179 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-20 11:45:38,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:38,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156971437] [2020-07-20 11:45:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:38,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:45:38,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-20 11:45:38,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-20 11:45:38,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156971437] [2020-07-20 11:45:38,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:38,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 11:45:38,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204883659] [2020-07-20 11:45:38,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:45:38,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:38,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:45:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:45:38,411 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-07-20 11:45:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:38,568 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-20 11:45:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:45:38,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-07-20 11:45:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:38,572 INFO L225 Difference]: With dead ends: 86 [2020-07-20 11:45:38,572 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:45:38,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:45:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:45:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-07-20 11:45:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:45:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-20 11:45:38,581 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 73 [2020-07-20 11:45:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:38,582 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-20 11:45:38,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:45:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-20 11:45:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 11:45:38,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:38,583 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:45:38,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:38,796 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-20 11:45:38,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:38,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700550210] [2020-07-20 11:45:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:45:38,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:45:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:45:39,122 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:45:39,172 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:45:39,172 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:45:39,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:39,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:45:39 BoogieIcfgContainer [2020-07-20 11:45:39,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:45:39,452 INFO L168 Benchmark]: Toolchain (without parser) took 7681.56 ms. Allocated memory was 145.8 MB in the beginning and 270.5 MB in the end (delta: 124.8 MB). Free memory was 102.7 MB in the beginning and 145.2 MB in the end (delta: -42.5 MB). Peak memory consumption was 82.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:39,457 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 11:45:39,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.08 ms. Allocated memory is still 145.8 MB. Free memory was 102.2 MB in the beginning and 91.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:39,459 INFO L168 Benchmark]: Boogie Preprocessor took 128.61 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 180.3 MB in the end (delta: -89.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:39,459 INFO L168 Benchmark]: RCFGBuilder took 460.40 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 162.0 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:39,460 INFO L168 Benchmark]: TraceAbstraction took 6820.90 ms. Allocated memory was 202.9 MB in the beginning and 270.5 MB in the end (delta: 67.6 MB). Free memory was 161.3 MB in the beginning and 145.2 MB in the end (delta: 16.2 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:39,463 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.08 ms. Allocated memory is still 145.8 MB. Free memory was 102.2 MB in the beginning and 91.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.61 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 180.3 MB in the end (delta: -89.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 460.40 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 162.0 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6820.90 ms. Allocated memory was 202.9 MB in the beginning and 270.5 MB in the end (delta: 67.6 MB). Free memory was 161.3 MB in the beginning and 145.2 MB in the end (delta: 16.2 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=5, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483648, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483648, x={2:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=-2147483648, temp=1, x={2:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483648, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483648, ret=-2147483648, temp=1, x={2:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=-2147483648, ret2=-2147483648, temp=0, x={2:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=0, ret=-2147483648, ret2=-2147483648, temp=0, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=-2147483648, ret2=-2147483648, ret5=0, temp=0, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=-2147483648, ret2=-2147483648, ret5=0, temp=0, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.6s, OverallIterations: 12, TraceHistogramMax: 9, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 369 SDtfs, 265 SDslu, 647 SDs, 0 SdLazy, 702 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 869 GetRequests, 782 SyntacticMatches, 22 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 40 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 649 NumberOfCodeBlocks, 649 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 854 ConstructedInterpolants, 0 QuantifiedInterpolants, 99574 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2061 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 972/1081 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...