/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 BIGGEST_EQUIVALENCE_CLASS --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 [2020-07-21 23:08:25,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:08:25,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:08:25,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:08:25,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:08:25,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:08:25,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:08:25,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:08:25,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:08:25,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:08:25,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:08:25,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:08:25,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:08:25,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:08:25,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:08:25,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:08:25,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:08:25,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:08:25,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:08:25,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:08:25,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:08:25,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:08:25,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:08:25,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:08:25,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:08:25,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:08:25,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:08:25,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:08:25,935 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 [2020-07-21 23:08:25,969 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:08:25,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:08:25,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:08:25,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:08:25,974 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:08:25,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:08:25,974 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:08:25,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:08:25,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:08:25,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:08:25,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:08:25,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:08:25,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:08:25,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:08:25,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:08:25,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:08:25,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:08:25,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:08:25,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:08:25,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:08:25,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:08:25,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:08:25,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:08:25,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:08:25,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:08:25,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:08:25,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:25,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:08:25,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:08:25,981 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:08:26,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:08:26,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:08:26,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:08:26,292 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:08:26,293 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:08:26,294 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-21 23:08:26,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a7385d81/783adb3ae54c496ab337636b34cfd688/FLAG3e3d09344 [2020-07-21 23:08:26,848 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:08:26,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-21 23:08:26,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a7385d81/783adb3ae54c496ab337636b34cfd688/FLAG3e3d09344 [2020-07-21 23:08:27,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a7385d81/783adb3ae54c496ab337636b34cfd688 [2020-07-21 23:08:27,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:08:27,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:08:27,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:08:27,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:08:27,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:08:27,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ff7c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27, skipping insertion in model container [2020-07-21 23:08:27,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:08:27,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:08:27,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:08:27,471 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:08:27,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:08:27,514 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:08:27,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27 WrapperNode [2020-07-21 23:08:27,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:08:27,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:08:27,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:08:27,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:08:27,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:08:27,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:08:27,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:08:27,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:08:27,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (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 [2020-07-21 23:08:27,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:08:27,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:08:27,713 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-21 23:08:27,713 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-21 23:08:27,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:08:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:08:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:08:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-21 23:08:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 23:08:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-21 23:08:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 23:08:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:08:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 23:08:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 23:08:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:08:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:08:28,057 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:08:28,058 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 23:08:28,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:28 BoogieIcfgContainer [2020-07-21 23:08:28,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:08:28,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:08:28,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:08:28,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:08:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:08:27" (1/3) ... [2020-07-21 23:08:28,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3672389a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:28, skipping insertion in model container [2020-07-21 23:08:28,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (2/3) ... [2020-07-21 23:08:28,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3672389a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:28, skipping insertion in model container [2020-07-21 23:08:28,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:28" (3/3) ... [2020-07-21 23:08:28,069 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-21 23:08:28,080 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:08:28,088 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:08:28,101 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:08:28,126 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:08:28,126 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:08:28,126 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:08:28,126 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:08:28,127 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:08:28,127 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:08:28,127 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:08:28,127 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:08:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-21 23:08:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 23:08:28,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:28,152 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] [2020-07-21 23:08:28,152 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:28,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-21 23:08:28,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:28,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295434582] [2020-07-21 23:08:28,166 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 [2020-07-21 23:08:28,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:08:28,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:08:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 23:08:28,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:28,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295434582] [2020-07-21 23:08:28,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:28,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:08:28,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140693650] [2020-07-21 23:08:28,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:08:28,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:08:28,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:08:28,354 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-07-21 23:08:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:28,383 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-07-21 23:08:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:08:28,384 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-07-21 23:08:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:28,395 INFO L225 Difference]: With dead ends: 67 [2020-07-21 23:08:28,395 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 23:08:28,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:08:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 23:08:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 23:08:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 23:08:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-21 23:08:28,450 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2020-07-21 23:08:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:28,451 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-21 23:08:28,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:08:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-21 23:08:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 23:08:28,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:28,455 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] [2020-07-21 23:08:28,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:28,669 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1240892162, now seen corresponding path program 1 times [2020-07-21 23:08:28,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:28,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614208961] [2020-07-21 23:08:28,671 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 [2020-07-21 23:08:28,758 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:08:28,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:28,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:28,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 23:08:28,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:28,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614208961] [2020-07-21 23:08:28,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:28,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:08:28,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697238941] [2020-07-21 23:08:28,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:08:28,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:28,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:08:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:08:28,828 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 4 states. [2020-07-21 23:08:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:28,946 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-07-21 23:08:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:08:28,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-07-21 23:08:28,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:28,948 INFO L225 Difference]: With dead ends: 57 [2020-07-21 23:08:28,948 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 23:08:28,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:08:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 23:08:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 23:08:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 23:08:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-07-21 23:08:28,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 38 [2020-07-21 23:08:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:28,973 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-07-21 23:08:28,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:08:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-07-21 23:08:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 23:08:28,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:28,975 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] [2020-07-21 23:08:29,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,179 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:29,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:29,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1060076508, now seen corresponding path program 1 times [2020-07-21 23:08:29,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:29,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212114340] [2020-07-21 23:08:29,182 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 [2020-07-21 23:08:29,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:29,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:29,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 23:08:29,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:29,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212114340] [2020-07-21 23:08:29,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:29,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:08:29,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678333927] [2020-07-21 23:08:29,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:08:29,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:29,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:08:29,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:08:29,294 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 3 states. [2020-07-21 23:08:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:29,419 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2020-07-21 23:08:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:08:29,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-07-21 23:08:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:29,423 INFO L225 Difference]: With dead ends: 58 [2020-07-21 23:08:29,423 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 23:08:29,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:08:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 23:08:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-21 23:08:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 23:08:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-21 23:08:29,460 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 40 [2020-07-21 23:08:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:29,460 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-21 23:08:29,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:08:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-21 23:08:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 23:08:29,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:29,462 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] [2020-07-21 23:08:29,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,663 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-07-21 23:08:29,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:29,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137943099] [2020-07-21 23:08:29,666 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 [2020-07-21 23:08:29,728 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:29,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:08:29,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 23:08:29,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 23:08:29,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137943099] [2020-07-21 23:08:29,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:29,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-21 23:08:29,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448950415] [2020-07-21 23:08:29,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:08:29,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:08:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:08:29,883 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 8 states. [2020-07-21 23:08:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:30,024 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-21 23:08:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:08:30,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-07-21 23:08:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:30,028 INFO L225 Difference]: With dead ends: 67 [2020-07-21 23:08:30,028 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 23:08:30,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:08:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 23:08:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-07-21 23:08:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 23:08:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-21 23:08:30,042 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-07-21 23:08:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:30,045 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-21 23:08:30,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:08:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-21 23:08:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 23:08:30,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:30,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:30,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:30,267 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:30,268 INFO L82 PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times [2020-07-21 23:08:30,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:30,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295386283] [2020-07-21 23:08:30,269 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 [2020-07-21 23:08:30,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:30,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 23:08:30,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:30,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295386283] [2020-07-21 23:08:30,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:30,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:08:30,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718872060] [2020-07-21 23:08:30,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:08:30,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:30,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:08:30,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:08:30,366 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-07-21 23:08:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:30,428 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-07-21 23:08:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:08:30,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-07-21 23:08:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:30,430 INFO L225 Difference]: With dead ends: 65 [2020-07-21 23:08:30,430 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 23:08:30,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:08:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 23:08:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-07-21 23:08:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 23:08:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-21 23:08:30,438 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2020-07-21 23:08:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:30,439 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-21 23:08:30,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:08:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-21 23:08:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 23:08:30,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:30,441 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:30,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:30,655 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times [2020-07-21 23:08:30,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:30,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082672478] [2020-07-21 23:08:30,656 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 [2020-07-21 23:08:30,712 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:30,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:08:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-21 23:08:30,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 23:08:30,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082672478] [2020-07-21 23:08:30,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:30,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-21 23:08:30,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600229881] [2020-07-21 23:08:30,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:08:30,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:08:30,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:08:30,904 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-07-21 23:08:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:31,083 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-21 23:08:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:08:31,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-21 23:08:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:31,085 INFO L225 Difference]: With dead ends: 70 [2020-07-21 23:08:31,085 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 23:08:31,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:08:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 23:08:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-21 23:08:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 23:08:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-21 23:08:31,094 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51 [2020-07-21 23:08:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:31,095 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-21 23:08:31,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:08:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-21 23:08:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 23:08:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:31,097 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:31,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:31,300 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times [2020-07-21 23:08:31,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:31,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242842567] [2020-07-21 23:08:31,301 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 [2020-07-21 23:08:31,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:31,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 23:08:31,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:31,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242842567] [2020-07-21 23:08:31,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:31,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:08:31,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871216890] [2020-07-21 23:08:31,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:08:31,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:08:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:08:31,404 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 4 states. [2020-07-21 23:08:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:31,461 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-07-21 23:08:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:08:31,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-21 23:08:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:31,463 INFO L225 Difference]: With dead ends: 69 [2020-07-21 23:08:31,463 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 23:08:31,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:08:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 23:08:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-21 23:08:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 23:08:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-21 23:08:31,477 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60 [2020-07-21 23:08:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:31,479 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-21 23:08:31,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:08:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-21 23:08:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 23:08:31,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:31,480 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] [2020-07-21 23:08:31,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:31,684 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times [2020-07-21 23:08:31,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:31,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13179469] [2020-07-21 23:08:31,687 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 [2020-07-21 23:08:31,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:31,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 23:08:31,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-21 23:08:31,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:31,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13179469] [2020-07-21 23:08:31,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:31,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 23:08:31,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790004811] [2020-07-21 23:08:31,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:08:31,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:08:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:08:31,850 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2020-07-21 23:08:31,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:31,906 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-21 23:08:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 23:08:31,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-21 23:08:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:31,908 INFO L225 Difference]: With dead ends: 74 [2020-07-21 23:08:31,909 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 23:08:31,909 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 [2020-07-21 23:08:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 23:08:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-21 23:08:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 23:08:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-21 23:08:31,921 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-21 23:08:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:31,922 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-21 23:08:31,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:08:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-21 23:08:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 23:08:31,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:31,924 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] [2020-07-21 23:08:32,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:32,138 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:32,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:32,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-21 23:08:32,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:32,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385063273] [2020-07-21 23:08:32,139 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 [2020-07-21 23:08:32,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:32,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:08:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 23:08:32,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 23:08:32,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385063273] [2020-07-21 23:08:32,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:32,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 23:08:32,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393338589] [2020-07-21 23:08:32,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 23:08:32,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:32,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 23:08:32,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 23:08:32,464 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states. [2020-07-21 23:08:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:32,732 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2020-07-21 23:08:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 23:08:32,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 23:08:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:32,735 INFO L225 Difference]: With dead ends: 139 [2020-07-21 23:08:32,735 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 23:08:32,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:08:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 23:08:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-21 23:08:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 23:08:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-07-21 23:08:32,749 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 65 [2020-07-21 23:08:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:32,750 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-07-21 23:08:32,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 23:08:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-07-21 23:08:32,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 23:08:32,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:32,752 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:32,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:32,967 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:32,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-21 23:08:32,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:32,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696321234] [2020-07-21 23:08:32,969 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 [2020-07-21 23:08:33,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:33,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:33,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:08:33,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 23:08:33,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 23:08:33,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696321234] [2020-07-21 23:08:33,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:33,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 23:08:33,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133265615] [2020-07-21 23:08:33,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 23:08:33,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:33,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 23:08:33,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 23:08:33,261 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 13 states. [2020-07-21 23:08:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:33,477 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2020-07-21 23:08:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 23:08:33,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-07-21 23:08:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:33,479 INFO L225 Difference]: With dead ends: 129 [2020-07-21 23:08:33,479 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 23:08:33,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-07-21 23:08:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 23:08:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2020-07-21 23:08:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 23:08:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-07-21 23:08:33,491 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 67 [2020-07-21 23:08:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:33,491 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-07-21 23:08:33,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 23:08:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-07-21 23:08:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 23:08:33,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:33,493 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:33,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:33,702 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-21 23:08:33,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:33,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962496023] [2020-07-21 23:08:33,704 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 [2020-07-21 23:08:33,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:33,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:33,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:08:33,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 23:08:33,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-21 23:08:33,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962496023] [2020-07-21 23:08:33,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:33,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 23:08:33,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929314620] [2020-07-21 23:08:33,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 23:08:33,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:33,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 23:08:33,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:08:33,929 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-07-21 23:08:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:34,038 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-21 23:08:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 23:08:34,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-07-21 23:08:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:34,041 INFO L225 Difference]: With dead ends: 86 [2020-07-21 23:08:34,041 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 23:08:34,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:08:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 23:08:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-07-21 23:08:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 23:08:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-21 23:08:34,051 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 73 [2020-07-21 23:08:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:34,051 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-21 23:08:34,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 23:08:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-21 23:08:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-21 23:08:34,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:34,053 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] [2020-07-21 23:08:34,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:34,267 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-21 23:08:34,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:34,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73695488] [2020-07-21 23:08:34,269 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 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 [2020-07-21 23:08:34,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:34,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:08:34,390 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:08:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:08:34,542 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:08:34,640 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:08:34,641 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:08:34,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:34,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:08:34 BoogieIcfgContainer [2020-07-21 23:08:34,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:08:34,934 INFO L168 Benchmark]: Toolchain (without parser) took 7710.98 ms. Allocated memory was 138.9 MB in the beginning and 273.7 MB in the end (delta: 134.7 MB). Free memory was 103.5 MB in the beginning and 138.1 MB in the end (delta: -34.7 MB). Peak memory consumption was 100.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:34,935 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 23:08:34,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.62 ms. Allocated memory is still 138.9 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:34,936 INFO L168 Benchmark]: Boogie Preprocessor took 131.72 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.5 MB in the beginning and 181.2 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:34,937 INFO L168 Benchmark]: RCFGBuilder took 414.24 ms. Allocated memory is still 203.4 MB. Free memory was 181.2 MB in the beginning and 161.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:34,938 INFO L168 Benchmark]: TraceAbstraction took 6867.85 ms. Allocated memory was 203.4 MB in the beginning and 273.7 MB in the end (delta: 70.3 MB). Free memory was 161.5 MB in the beginning and 138.1 MB in the end (delta: 23.4 MB). Peak memory consumption was 93.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:34,941 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.62 ms. Allocated memory is still 138.9 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.72 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.5 MB in the beginning and 181.2 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 414.24 ms. Allocated memory is still 203.4 MB. Free memory was 181.2 MB in the beginning and 161.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6867.85 ms. Allocated memory was 203.4 MB in the beginning and 273.7 MB in the end (delta: 70.3 MB). Free memory was 161.5 MB in the beginning and 138.1 MB in the end (delta: 23.4 MB). Peak memory consumption was 93.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=5, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483648, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483648, x={2:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=-2147483648, temp=-2147483646, x={2:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483648, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483648, ret=-2147483648, temp=-2147483646, x={2:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=-2147483648, ret2=-2147483648, temp=-2147483647, 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=-2147483647, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483647, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483647, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483647, cnt=1, i=3, N=3, ret=-2147483647, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=-2147483647, ret=-2147483648, ret2=-2147483648, temp=-2147483647, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=-2147483648, ret2=-2147483648, ret5=-2147483647, temp=-2147483647, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=-2147483648, ret2=-2147483648, ret5=-2147483647, temp=-2147483647, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 12, TraceHistogramMax: 9, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 368 SDtfs, 276 SDslu, 762 SDs, 0 SdLazy, 764 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 871 GetRequests, 784 SyntacticMatches, 22 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 40 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 651 NumberOfCodeBlocks, 446 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 856 ConstructedInterpolants, 0 QuantifiedInterpolants, 99734 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1436 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 973/1082 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...