/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/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:45:30,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:45:30,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:45:30,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:45:30,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:45:30,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:45:30,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:45:30,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:45:30,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:45:30,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:45:30,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:45:30,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:45:30,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:45:30,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:45:30,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:45:30,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:45:30,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:45:30,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:45:30,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:45:30,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:45:30,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:45:30,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:45:30,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:45:30,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:45:30,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:45:30,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:45:30,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:45:30,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:45:30,461 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 11:45:30,475 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:45:30,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:45:30,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:45:30,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:45:30,477 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:45:30,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:45:30,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:45:30,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:45:30,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:45:30,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:45:30,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:45:30,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:45:30,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:45:30,478 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:45:30,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:45:30,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:45:30,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:45:30,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:45:30,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:45:30,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:45:30,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:45:30,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:45:30,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:45:30,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:45:30,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:45:30,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:45:30,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:30,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:45:30,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:45:30,482 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 11:45:30,809 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:45:30,821 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:45:30,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:45:30,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:45:30,826 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:45:30,827 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 11:45:30,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d502e2dc3/ce4ad4f445e64cae83fcd7011f37b860/FLAG5a9494c1a [2020-07-20 11:45:31,303 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:45:31,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 11:45:31,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d502e2dc3/ce4ad4f445e64cae83fcd7011f37b860/FLAG5a9494c1a [2020-07-20 11:45:31,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d502e2dc3/ce4ad4f445e64cae83fcd7011f37b860 [2020-07-20 11:45:31,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:45:31,692 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:45:31,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:45:31,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:45:31,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:45:31,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:31,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9ef9d8 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 11:45:31,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:31,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:45:31,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:45:31,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:45:31,912 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:45:31,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:45:31,954 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:45:31,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31 WrapperNode [2020-07-20 11:45:31,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:45:31,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:45:31,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:45:31,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:45:32,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:32,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:32,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:32,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:32,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:32,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:32,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (1/1) ... [2020-07-20 11:45:32,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:45:32,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:45:32,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:45:32,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:45:32,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (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 11:45:32,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:45:32,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:45:32,161 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 11:45:32,162 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 11:45:32,162 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:45:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:45:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:45:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 11:45:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:45:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 11:45:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:45:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:45:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:45:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:45:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:45:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:45:32,605 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:45:32,606 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:45:32,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:45:32 BoogieIcfgContainer [2020-07-20 11:45:32,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:45:32,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:45:32,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:45:32,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:45:32,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:45:31" (1/3) ... [2020-07-20 11:45:32,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2052153f 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 11:45:32,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:31" (2/3) ... [2020-07-20 11:45:32,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2052153f 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 11:45:32,616 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 11:45:32,617 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-20 11:45:32,628 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:45:32,634 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:45:32,650 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:45:32,674 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:45:32,675 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:45:32,675 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:45:32,675 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:45:32,675 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:45:32,675 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:45:32,675 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:45:32,676 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:45:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 11:45:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 11:45:32,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:32,702 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] [2020-07-20 11:45:32,702 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:32,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:32,707 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-20 11:45:32,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:32,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93726215] [2020-07-20 11:45:32,716 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 11:45:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:45:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 11:45:32,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:32,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93726215] [2020-07-20 11:45:32,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:32,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:45:32,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80217935] [2020-07-20 11:45:32,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:45:32,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:45:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:45:32,929 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-07-20 11:45:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:32,957 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-07-20 11:45:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:45:32,959 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-07-20 11:45:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:32,968 INFO L225 Difference]: With dead ends: 64 [2020-07-20 11:45:32,969 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:45:32,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 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 11:45:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:45:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-20 11:45:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 11:45:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-20 11:45:33,019 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2020-07-20 11:45:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:33,019 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-20 11:45:33,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:45:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-20 11:45:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 11:45:33,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:33,023 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] [2020-07-20 11:45:33,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:33,239 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:33,240 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2020-07-20 11:45:33,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:33,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562504267] [2020-07-20 11:45:33,243 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 11:45:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:45:33,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:33,375 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 11:45:33,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:33,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562504267] [2020-07-20 11:45:33,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:33,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:45:33,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322649090] [2020-07-20 11:45:33,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:45:33,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:33,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:45:33,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:45:33,381 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2020-07-20 11:45:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:33,413 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-07-20 11:45:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:45:33,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 11:45:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:33,415 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:45:33,415 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 11:45:33,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 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 11:45:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 11:45:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-20 11:45:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:45:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-20 11:45:33,425 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2020-07-20 11:45:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:33,425 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-20 11:45:33,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:45:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-20 11:45:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:45:33,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:33,427 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] [2020-07-20 11:45:33,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:33,644 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2020-07-20 11:45:33,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:33,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937514333] [2020-07-20 11:45:33,647 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 11:45:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:45:33,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:45:33,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:33,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937514333] [2020-07-20 11:45:33,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:33,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:45:33,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364258307] [2020-07-20 11:45:33,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:45:33,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:45:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:45:33,766 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-20 11:45:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:33,799 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2020-07-20 11:45:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:45:33,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-20 11:45:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:33,803 INFO L225 Difference]: With dead ends: 54 [2020-07-20 11:45:33,803 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 11:45:33,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 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 11:45:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 11:45:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 11:45:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:45:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-20 11:45:33,820 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2020-07-20 11:45:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:33,821 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-20 11:45:33,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:45:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-20 11:45:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 11:45:33,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:33,828 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 11:45:34,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:34,038 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1719401286, now seen corresponding path program 1 times [2020-07-20 11:45:34,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:34,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982646632] [2020-07-20 11:45:34,041 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 11:45:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:45:34,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 11:45:34,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:34,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982646632] [2020-07-20 11:45:34,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:34,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:45:34,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469173527] [2020-07-20 11:45:34,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:45:34,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:34,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:45:34,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:45:34,161 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2020-07-20 11:45:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:34,181 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-07-20 11:45:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:45:34,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-20 11:45:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:34,183 INFO L225 Difference]: With dead ends: 52 [2020-07-20 11:45:34,183 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:45:34,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 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 11:45:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:45:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-07-20 11:45:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:45:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-07-20 11:45:34,190 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2020-07-20 11:45:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:34,192 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-07-20 11:45:34,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:45:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-07-20 11:45:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 11:45:34,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:34,194 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-07-20 11:45:34,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:34,409 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash 494084840, now seen corresponding path program 1 times [2020-07-20 11:45:34,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:34,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163362210] [2020-07-20 11:45:34,412 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 11:45:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:34,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 11:45:34,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:34,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163362210] [2020-07-20 11:45:34,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:34,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:45:34,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014021140] [2020-07-20 11:45:34,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:45:34,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:34,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:45:34,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:45:34,492 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 3 states. [2020-07-20 11:45:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:34,599 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-07-20 11:45:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:45:34,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-07-20 11:45:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:34,602 INFO L225 Difference]: With dead ends: 63 [2020-07-20 11:45:34,602 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:45:34,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 11:45:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:45:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-20 11:45:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:45:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-20 11:45:34,611 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 50 [2020-07-20 11:45:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:34,611 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-20 11:45:34,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:45:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-20 11:45:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 11:45:34,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:34,613 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-07-20 11:45:34,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:34,828 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2020-07-20 11:45:34,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:34,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441111270] [2020-07-20 11:45:34,831 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 11:45:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:34,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:34,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 11:45:34,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 11:45:35,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441111270] [2020-07-20 11:45:35,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:35,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 11:45:35,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11405749] [2020-07-20 11:45:35,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:45:35,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:45:35,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:45:35,007 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-07-20 11:45:35,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:35,060 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-07-20 11:45:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:45:35,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-07-20 11:45:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:35,062 INFO L225 Difference]: With dead ends: 75 [2020-07-20 11:45:35,062 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 11:45:35,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:45:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 11:45:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-20 11:45:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:45:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 11:45:35,079 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 50 [2020-07-20 11:45:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:35,080 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 11:45:35,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:45:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 11:45:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 11:45:35,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:35,085 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-07-20 11:45:35,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:35,286 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash -463307829, now seen corresponding path program 2 times [2020-07-20 11:45:35,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:35,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624932636] [2020-07-20 11:45:35,289 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 11:45:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:35,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:45:35,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 11:45:35,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 11:45:35,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624932636] [2020-07-20 11:45:35,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:35,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 11:45:35,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216621081] [2020-07-20 11:45:35,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:45:35,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:45:35,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:45:35,514 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2020-07-20 11:45:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:35,561 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-07-20 11:45:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:45:35,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-20 11:45:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:35,567 INFO L225 Difference]: With dead ends: 77 [2020-07-20 11:45:35,567 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:45:35,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:45:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:45:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 11:45:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 11:45:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-07-20 11:45:35,581 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 56 [2020-07-20 11:45:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:35,581 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-07-20 11:45:35,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:45:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-07-20 11:45:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 11:45:35,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:35,588 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-07-20 11:45:35,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:35,802 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash 466239373, now seen corresponding path program 3 times [2020-07-20 11:45:35,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:35,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048011562] [2020-07-20 11:45:35,804 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 11:45:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:35,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 11:45:35,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 11:45:35,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048011562] [2020-07-20 11:45:35,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:35,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 11:45:35,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746596141] [2020-07-20 11:45:35,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:45:35,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:45:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:45:35,942 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-07-20 11:45:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:35,999 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-20 11:45:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:45:36,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-07-20 11:45:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:36,001 INFO L225 Difference]: With dead ends: 80 [2020-07-20 11:45:36,001 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 11:45:36,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:45:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 11:45:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-07-20 11:45:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 11:45:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-20 11:45:36,010 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 58 [2020-07-20 11:45:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:36,010 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-20 11:45:36,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:45:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-20 11:45:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 11:45:36,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:36,012 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 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] [2020-07-20 11:45:36,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:36,227 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:36,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1145938068, now seen corresponding path program 1 times [2020-07-20 11:45:36,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:36,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821156641] [2020-07-20 11:45:36,230 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 11:45:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:45:36,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 85 proven. 7 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-07-20 11:45:36,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 13 proven. 127 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 11:45:36,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821156641] [2020-07-20 11:45:36,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:36,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-20 11:45:36,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635586354] [2020-07-20 11:45:36,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:45:36,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:45:36,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:45:36,373 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 5 states. [2020-07-20 11:45:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:36,400 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-07-20 11:45:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:45:36,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-07-20 11:45:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:36,402 INFO L225 Difference]: With dead ends: 81 [2020-07-20 11:45:36,402 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 11:45:36,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:45:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 11:45:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-20 11:45:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 11:45:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-07-20 11:45:36,408 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 85 [2020-07-20 11:45:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:36,409 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-07-20 11:45:36,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:45:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-07-20 11:45:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 11:45:36,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:36,410 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 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] [2020-07-20 11:45:36,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:36,626 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:36,626 INFO L82 PathProgramCache]: Analyzing trace with hash -855759126, now seen corresponding path program 2 times [2020-07-20 11:45:36,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:36,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584330764] [2020-07-20 11:45:36,627 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 11:45:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:36,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:45:36,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-20 11:45:36,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-07-20 11:45:36,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584330764] [2020-07-20 11:45:36,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:36,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 11:45:36,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183865777] [2020-07-20 11:45:36,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:45:36,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:36,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:45:36,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:45:36,790 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 7 states. [2020-07-20 11:45:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:36,825 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-07-20 11:45:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:45:36,825 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-07-20 11:45:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:36,826 INFO L225 Difference]: With dead ends: 84 [2020-07-20 11:45:36,826 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 11:45:36,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:45:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 11:45:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-20 11:45:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:45:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-07-20 11:45:36,833 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 85 [2020-07-20 11:45:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:36,833 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-07-20 11:45:36,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:45:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-07-20 11:45:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 11:45:36,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:36,835 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2020-07-20 11:45:37,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:37,049 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 3 times [2020-07-20 11:45:37,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:37,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699566690] [2020-07-20 11:45:37,052 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 11:45:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 11:45:37,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:45:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-07-20 11:45:37,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699566690] [2020-07-20 11:45:37,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:45:37,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 11:45:37,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190850605] [2020-07-20 11:45:37,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:45:37,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:37,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:45:37,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:45:37,213 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 6 states. [2020-07-20 11:45:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:37,250 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-07-20 11:45:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:45:37,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-07-20 11:45:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:37,252 INFO L225 Difference]: With dead ends: 87 [2020-07-20 11:45:37,252 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 11:45:37,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:45:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 11:45:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-20 11:45:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 11:45:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-20 11:45:37,259 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 94 [2020-07-20 11:45:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:37,260 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-20 11:45:37,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:45:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-20 11:45:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 11:45:37,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:37,261 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 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] [2020-07-20 11:45:37,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:37,477 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 4 times [2020-07-20 11:45:37,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:37,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644719449] [2020-07-20 11:45:37,478 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 11:45:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:45:37,653 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:45:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:45:37,733 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:45:37,793 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:45:37,793 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:45:38,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:38,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:45:38 BoogieIcfgContainer [2020-07-20 11:45:38,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:45:38,092 INFO L168 Benchmark]: Toolchain (without parser) took 6400.49 ms. Allocated memory was 141.0 MB in the beginning and 260.0 MB in the end (delta: 119.0 MB). Free memory was 99.1 MB in the beginning and 199.0 MB in the end (delta: -99.9 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,093 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 117.3 MB in the beginning and 117.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.34 ms. Allocated memory is still 141.0 MB. Free memory was 98.7 MB in the beginning and 87.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,094 INFO L168 Benchmark]: Boogie Preprocessor took 131.92 ms. Allocated memory was 141.0 MB in the beginning and 198.7 MB in the end (delta: 57.7 MB). Free memory was 87.8 MB in the beginning and 176.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,095 INFO L168 Benchmark]: RCFGBuilder took 522.16 ms. Allocated memory is still 198.7 MB. Free memory was 175.8 MB in the beginning and 157.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,096 INFO L168 Benchmark]: TraceAbstraction took 5478.91 ms. Allocated memory was 198.7 MB in the beginning and 260.0 MB in the end (delta: 61.3 MB). Free memory was 157.4 MB in the beginning and 199.0 MB in the end (delta: -41.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,099 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 117.3 MB in the beginning and 117.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.34 ms. Allocated memory is still 141.0 MB. Free memory was 98.7 MB in the beginning and 87.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.92 ms. Allocated memory was 141.0 MB in the beginning and 198.7 MB in the end (delta: 57.7 MB). Free memory was 87.8 MB in the beginning and 176.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 522.16 ms. Allocated memory is still 198.7 MB. Free memory was 175.8 MB in the beginning and 157.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5478.91 ms. Allocated memory was 198.7 MB in the beginning and 260.0 MB in the end (delta: 61.3 MB). Free memory was 157.4 MB in the beginning and 199.0 MB in the end (delta: -41.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; VAL [x={2:0}] [L32] CALL init_nondet(x) VAL [x={2:0}] [L5] int i; [L6] i = 0 VAL [i=0, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=1, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=2, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=3, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=4, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=5, x={2:0}, x={2:0}] [L6] COND FALSE !(i < 5) VAL [i=5, x={2:0}, x={2:0}] [L32] RET init_nondet(x) VAL [x={2:0}] [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; VAL [x={2:0}] [L38] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=0, cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L38] RET, EXPR rangesum(x) VAL [rangesum(x)=0, x={2:0}] [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp VAL [ret=0, temp=-2, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=0, cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [rangesum(x)=0, ret=0, temp=-2, x={2:0}] [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; VAL [i=0, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=1, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=2, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=3, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=4, ret=0, ret2=0, temp=3, x={2:0}] [L43] COND FALSE !(i<5 -1) VAL [i=4, ret=0, ret2=0, temp=3, x={2:0}] [L46] x[5 -1] = temp VAL [i=4, ret=0, ret2=0, temp=3, x={2:0}] [L47] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=5, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=2, cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L47] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=2, ret=0, ret2=0, temp=3, x={2:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=0, ret2=0, ret5=2, temp=3, x={2:0}] [L50] __VERIFIER_error() VAL [i=4, ret=0, ret2=0, ret5=2, temp=3, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 12, TraceHistogramMax: 15, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 397 SDtfs, 46 SDslu, 528 SDs, 0 SdLazy, 109 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1056 GetRequests, 1015 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=11, 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, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 739 NumberOfCodeBlocks, 739 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1050 ConstructedInterpolants, 0 QuantifiedInterpolants, 83902 SizeOfPredicates, 9 NumberOfNonLiveVariables, 2065 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 1951/2305 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...