/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 22:12:45,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:12:45,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:12:45,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:12:45,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:12:45,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:12:45,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:12:45,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:12:45,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:12:45,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:12:45,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:12:45,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:12:45,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:12:45,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:12:45,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:12:45,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:12:45,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:12:45,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:12:45,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:12:45,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:12:45,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:12:45,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:12:45,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:12:45,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:12:45,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:12:45,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:12:45,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:12:45,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:12:45,962 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 22:12:45,977 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:12:45,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:12:45,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:12:45,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:12:45,980 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:12:45,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:12:45,980 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:12:45,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:12:45,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:12:45,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:12:45,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:12:45,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:12:45,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:12:45,981 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:12:45,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:12:45,982 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:12:45,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:12:45,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:12:45,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:12:45,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:12:45,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:12:45,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:12:45,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:12:45,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:12:45,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:12:45,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:12:45,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:45,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:12:45,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:12:45,985 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:12:46,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:12:46,302 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:12:46,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:12:46,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:12:46,311 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:12:46,312 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 22:12:46,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53514404/25dd85b029ab46289760da48b70499d0/FLAG6b4d5d138 [2020-07-20 22:12:46,864 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:12:46,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 22:12:46,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53514404/25dd85b029ab46289760da48b70499d0/FLAG6b4d5d138 [2020-07-20 22:12:47,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53514404/25dd85b029ab46289760da48b70499d0 [2020-07-20 22:12:47,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:12:47,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:12:47,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:12:47,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:12:47,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:12:47,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a56918a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47, skipping insertion in model container [2020-07-20 22:12:47,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:12:47,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:12:47,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:12:47,539 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:12:47,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:12:47,671 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:12:47,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47 WrapperNode [2020-07-20 22:12:47,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:12:47,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:12:47,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:12:47,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:12:47,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:12:47,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:12:47,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:12:47,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:12:47,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (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 22:12:47,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:12:47,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:12:47,812 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 22:12:47,813 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 22:12:47,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:12:47,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:12:47,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:12:47,815 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 22:12:47,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:12:47,815 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 22:12:47,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:12:47,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:12:47,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:12:47,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:12:47,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:12:47,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:12:48,161 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:12:48,161 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 22:12:48,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:12:48 BoogieIcfgContainer [2020-07-20 22:12:48,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:12:48,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:12:48,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:12:48,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:12:48,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:12:47" (1/3) ... [2020-07-20 22:12:48,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d451225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:12:48, skipping insertion in model container [2020-07-20 22:12:48,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47" (2/3) ... [2020-07-20 22:12:48,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d451225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:12:48, skipping insertion in model container [2020-07-20 22:12:48,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:12:48" (3/3) ... [2020-07-20 22:12:48,175 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-20 22:12:48,187 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:12:48,195 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:12:48,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:12:48,240 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:12:48,241 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:12:48,241 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:12:48,241 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:12:48,241 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:12:48,241 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:12:48,241 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:12:48,241 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:12:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-20 22:12:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 22:12:48,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:48,279 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 22:12:48,280 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-20 22:12:48,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:48,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71354280] [2020-07-20 22:12:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:48,435 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:12:48,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:48,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:48,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:48,502 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 22:12:48,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:48,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71354280] [2020-07-20 22:12:48,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:48,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:12:48,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85375707] [2020-07-20 22:12:48,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:12:48,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:12:48,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:48,528 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-07-20 22:12:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:48,746 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 22:12:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:12:48,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-20 22:12:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:48,760 INFO L225 Difference]: With dead ends: 73 [2020-07-20 22:12:48,761 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 22:12:48,765 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 22:12:48,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 22:12:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 22:12:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 22:12:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-20 22:12:48,820 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-20 22:12:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:48,821 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-20 22:12:48,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:12:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-20 22:12:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 22:12:48,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:48,826 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 22:12:49,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:49,041 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-20 22:12:49,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:49,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081491439] [2020-07-20 22:12:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:49,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:12:49,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:49,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 22:12:49,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:49,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081491439] [2020-07-20 22:12:49,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:49,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:12:49,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830275657] [2020-07-20 22:12:49,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:12:49,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:12:49,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:12:49,171 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2020-07-20 22:12:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:49,238 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-07-20 22:12:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:12:49,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-07-20 22:12:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:49,241 INFO L225 Difference]: With dead ends: 56 [2020-07-20 22:12:49,241 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 22:12:49,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 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 22:12:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 22:12:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 22:12:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 22:12:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 22:12:49,252 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-20 22:12:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:49,252 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 22:12:49,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:12:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 22:12:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 22:12:49,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:49,255 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 22:12:49,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:49,470 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash -759897477, now seen corresponding path program 1 times [2020-07-20 22:12:49,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:49,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379102952] [2020-07-20 22:12:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:49,552 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:49,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 22:12:49,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:49,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379102952] [2020-07-20 22:12:49,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:49,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:12:49,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027833682] [2020-07-20 22:12:49,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:12:49,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:12:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:12:49,586 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-07-20 22:12:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:49,667 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-20 22:12:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:12:49,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-07-20 22:12:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:49,669 INFO L225 Difference]: With dead ends: 67 [2020-07-20 22:12:49,669 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 22:12:49,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 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 22:12:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 22:12:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 22:12:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 22:12:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-20 22:12:49,678 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 40 [2020-07-20 22:12:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:49,678 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-20 22:12:49,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:12:49,679 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-20 22:12:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 22:12:49,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:49,680 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, 1, 1] [2020-07-20 22:12:49,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:49,894 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:49,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1437163047, now seen corresponding path program 1 times [2020-07-20 22:12:49,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:49,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770215645] [2020-07-20 22:12:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:49,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:49,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:49,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:12:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 22:12:50,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 22:12:50,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770215645] [2020-07-20 22:12:50,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:50,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-20 22:12:50,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922652498] [2020-07-20 22:12:50,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:12:50,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:50,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:12:50,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:12:50,099 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-07-20 22:12:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:50,206 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-07-20 22:12:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:12:50,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-07-20 22:12:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:50,208 INFO L225 Difference]: With dead ends: 69 [2020-07-20 22:12:50,208 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 22:12:50,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 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 22:12:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 22:12:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 22:12:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 22:12:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 22:12:50,217 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2020-07-20 22:12:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:50,218 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 22:12:50,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:12:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 22:12:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 22:12:50,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:50,219 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, 1, 1] [2020-07-20 22:12:50,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,435 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash 545653175, now seen corresponding path program 2 times [2020-07-20 22:12:50,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:50,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733069499] [2020-07-20 22:12:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:50,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:50,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 22:12:50,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:50,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733069499] [2020-07-20 22:12:50,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:50,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:12:50,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534888257] [2020-07-20 22:12:50,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:12:50,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:50,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:12:50,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:12:50,558 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2020-07-20 22:12:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:50,621 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-07-20 22:12:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:12:50,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-07-20 22:12:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:50,623 INFO L225 Difference]: With dead ends: 67 [2020-07-20 22:12:50,623 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 22:12:50,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 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 22:12:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 22:12:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 22:12:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 22:12:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-07-20 22:12:50,637 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 44 [2020-07-20 22:12:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:50,637 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-07-20 22:12:50,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:12:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-07-20 22:12:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 22:12:50,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:50,641 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, 1, 1] [2020-07-20 22:12:50,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,855 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:50,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2870664, now seen corresponding path program 1 times [2020-07-20 22:12:50,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:50,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005114327] [2020-07-20 22:12:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:50,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:50,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:50,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:12:50,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 22:12:50,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 22:12:51,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005114327] [2020-07-20 22:12:51,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:51,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-20 22:12:51,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88876164] [2020-07-20 22:12:51,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:12:51,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:51,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:12:51,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:12:51,082 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 8 states. [2020-07-20 22:12:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:51,198 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-07-20 22:12:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:12:51,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-07-20 22:12:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:51,200 INFO L225 Difference]: With dead ends: 72 [2020-07-20 22:12:51,200 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 22:12:51,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 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 22:12:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 22:12:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 22:12:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 22:12:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 22:12:51,207 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 53 [2020-07-20 22:12:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:51,208 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 22:12:51,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:12:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 22:12:51,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 22:12:51,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:51,209 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 22:12:51,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:51,423 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:51,423 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 2 times [2020-07-20 22:12:51,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:51,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873364400] [2020-07-20 22:12:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:51,506 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:12:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:12:51,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:51,600 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 22:12:51,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:51,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873364400] [2020-07-20 22:12:51,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:51,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 22:12:51,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204473174] [2020-07-20 22:12:51,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:12:51,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:12:51,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:12:51,603 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2020-07-20 22:12:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:51,666 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-20 22:12:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:12:51,666 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-20 22:12:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:51,668 INFO L225 Difference]: With dead ends: 74 [2020-07-20 22:12:51,668 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 22:12:51,669 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 22:12:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 22:12:51,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-20 22:12:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 22:12:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-20 22:12:51,680 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-20 22:12:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:51,681 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-20 22:12:51,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:12:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-20 22:12:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 22:12:51,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:51,683 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 22:12:51,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:51,899 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-20 22:12:51,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:51,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856792947] [2020-07-20 22:12:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:51,997 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:12:51,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:12:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-20 22:12:52,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-20 22:12:52,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856792947] [2020-07-20 22:12:52,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:52,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 22:12:52,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466501294] [2020-07-20 22:12:52,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 22:12:52,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:52,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 22:12:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:12:52,181 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 12 states. [2020-07-20 22:12:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:52,408 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2020-07-20 22:12:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 22:12:52,409 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-07-20 22:12:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:52,414 INFO L225 Difference]: With dead ends: 123 [2020-07-20 22:12:52,414 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 22:12:52,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:12:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 22:12:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-07-20 22:12:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 22:12:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-07-20 22:12:52,436 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 65 [2020-07-20 22:12:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:52,437 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-07-20 22:12:52,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 22:12:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-07-20 22:12:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 22:12:52,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:52,439 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:52,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:52,654 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:52,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1058231685, now seen corresponding path program 2 times [2020-07-20 22:12:52,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:52,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365630081] [2020-07-20 22:12:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:52,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:52,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:12:52,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-20 22:12:52,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-07-20 22:12:52,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365630081] [2020-07-20 22:12:52,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:52,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 22:12:52,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732868414] [2020-07-20 22:12:52,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 22:12:52,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 22:12:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:12:52,952 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 10 states. [2020-07-20 22:12:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:53,076 INFO L93 Difference]: Finished difference Result 180 states and 223 transitions. [2020-07-20 22:12:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:12:53,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-07-20 22:12:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:53,079 INFO L225 Difference]: With dead ends: 180 [2020-07-20 22:12:53,079 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 22:12:53,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:12:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 22:12:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-07-20 22:12:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-20 22:12:53,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-07-20 22:12:53,102 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 67 [2020-07-20 22:12:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:53,102 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-07-20 22:12:53,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 22:12:53,102 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2020-07-20 22:12:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 22:12:53,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:53,104 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 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] [2020-07-20 22:12:53,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:53,316 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1913896867, now seen corresponding path program 3 times [2020-07-20 22:12:53,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:53,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527794174] [2020-07-20 22:12:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:53,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:12:53,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 22:12:53,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-07-20 22:12:53,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527794174] [2020-07-20 22:12:53,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:53,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 22:12:53,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030173080] [2020-07-20 22:12:53,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 22:12:53,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:53,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 22:12:53,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 22:12:53,652 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 13 states. [2020-07-20 22:12:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:53,863 INFO L93 Difference]: Finished difference Result 139 states and 183 transitions. [2020-07-20 22:12:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 22:12:53,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-20 22:12:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:53,865 INFO L225 Difference]: With dead ends: 139 [2020-07-20 22:12:53,866 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 22:12:53,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-07-20 22:12:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 22:12:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2020-07-20 22:12:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 22:12:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-20 22:12:53,876 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 69 [2020-07-20 22:12:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:53,876 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-20 22:12:53,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 22:12:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-20 22:12:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 22:12:53,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:53,878 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 22:12:54,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:54,094 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 1 times [2020-07-20 22:12:54,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:54,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242229470] [2020-07-20 22:12:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:12:54,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:12:54,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:12:54,489 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:12:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:12:54,545 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:12:54,592 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:12:54,592 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:12:54,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:54,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:12:54 BoogieIcfgContainer [2020-07-20 22:12:54,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:12:54,905 INFO L168 Benchmark]: Toolchain (without parser) took 7618.47 ms. Allocated memory was 136.8 MB in the beginning and 294.6 MB in the end (delta: 157.8 MB). Free memory was 100.4 MB in the beginning and 225.7 MB in the end (delta: -125.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:54,906 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 22:12:54,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.98 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 99.9 MB in the beginning and 178.3 MB in the end (delta: -78.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:54,908 INFO L168 Benchmark]: Boogie Preprocessor took 66.82 ms. Allocated memory is still 199.8 MB. Free memory was 178.3 MB in the beginning and 175.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:54,909 INFO L168 Benchmark]: RCFGBuilder took 424.95 ms. Allocated memory is still 199.8 MB. Free memory was 175.7 MB in the beginning and 157.5 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:54,910 INFO L168 Benchmark]: TraceAbstraction took 6735.84 ms. Allocated memory was 199.8 MB in the beginning and 294.6 MB in the end (delta: 94.9 MB). Free memory was 156.8 MB in the beginning and 225.7 MB in the end (delta: -68.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:54,913 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 383.98 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 99.9 MB in the beginning and 178.3 MB in the end (delta: -78.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.82 ms. Allocated memory is still 199.8 MB. Free memory was 178.3 MB in the beginning and 175.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 424.95 ms. Allocated memory is still 199.8 MB. Free memory was 175.7 MB in the beginning and 157.5 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6735.84 ms. Allocated memory was 199.8 MB in the beginning and 294.6 MB in the end (delta: 94.9 MB). Free memory was 156.8 MB in the beginning and 225.7 MB in the end (delta: -68.9 MB). Peak memory consumption was 26.0 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=3, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=3, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=3, 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=3, temp=2, 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=3, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=3, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=3, ret=3, temp=2, 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=3, ret2=3, temp=1, 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=1, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=1, ret=3, ret2=3, temp=1, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=3, ret2=3, ret5=1, temp=1, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=3, ret2=3, ret5=1, temp=1, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.5s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 281 SDslu, 753 SDs, 0 SdLazy, 726 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 815 GetRequests, 729 SyntacticMatches, 21 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred 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, 10 MinimizatonAttempts, 41 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 593 NumberOfCodeBlocks, 475 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 85717 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1539 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 806/905 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...