/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:36:20,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:36:20,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:36:20,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:36:20,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:36:20,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:36:20,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:36:20,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:36:20,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:36:20,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:36:20,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:36:20,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:36:20,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:36:20,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:36:20,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:36:20,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:36:20,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:36:20,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:36:20,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:36:20,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:36:20,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:36:20,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:36:20,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:36:20,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:36:20,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:36:20,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:36:20,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:36:20,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:36:20,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:36:21,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:36:21,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:36:21,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:36:21,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:36:21,011 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:36:21,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:36:21,014 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:36:21,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:36:21,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:36:21,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:36:21,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:36:21,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:36:21,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:36:21,019 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:36:21,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:36:21,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:36:21,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:36:21,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:36:21,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:36:21,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:36:21,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:36:21,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:21,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:36:21,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:36:21,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:36:21,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:36:21,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:21,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:36:21,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:36:21,025 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 -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:36:21,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:36:21,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:36:21,381 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:36:21,383 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:36:21,383 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:36:21,384 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 17:36:21,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af79f0089/d040105b209b4ee2abe5554bc64e0f3c/FLAGca2af478c [2020-07-20 17:36:22,020 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:36:22,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 17:36:22,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af79f0089/d040105b209b4ee2abe5554bc64e0f3c/FLAGca2af478c [2020-07-20 17:36:22,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af79f0089/d040105b209b4ee2abe5554bc64e0f3c [2020-07-20 17:36:22,327 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:36:22,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:36:22,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:22,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:36:22,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:36:22,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f1137b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22, skipping insertion in model container [2020-07-20 17:36:22,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:36:22,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:36:22,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:22,590 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:36:22,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:22,650 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:36:22,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22 WrapperNode [2020-07-20 17:36:22,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:22,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:36:22,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:36:22,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:36:22,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:36:22,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:36:22,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:36:22,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:36:22,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:22,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:36:22,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:36:22,940 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 17:36:22,940 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 17:36:22,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:36:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:36:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:36:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 17:36:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:36:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 17:36:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:36:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:36:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:36:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:36:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:36:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:36:23,336 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:36:23,336 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 17:36:23,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:23 BoogieIcfgContainer [2020-07-20 17:36:23,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:36:23,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:36:23,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:36:23,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:36:23,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:36:22" (1/3) ... [2020-07-20 17:36:23,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c29d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:23, skipping insertion in model container [2020-07-20 17:36:23,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (2/3) ... [2020-07-20 17:36:23,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c29d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:23, skipping insertion in model container [2020-07-20 17:36:23,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:23" (3/3) ... [2020-07-20 17:36:23,355 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-20 17:36:23,369 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:36:23,379 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:36:23,400 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:36:23,449 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:36:23,450 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:36:23,450 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:36:23,450 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:36:23,450 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:36:23,451 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:36:23,451 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:36:23,451 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:36:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-20 17:36:23,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:36:23,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:23,486 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:23,486 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-20 17:36:23,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:23,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284728638] [2020-07-20 17:36:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:23,702 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:23,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 17:36:23,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:23,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284728638] [2020-07-20 17:36:23,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:23,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:36:23,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425490144] [2020-07-20 17:36:23,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:36:23,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:36:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:23,828 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-07-20 17:36:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:24,076 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 17:36:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:36:24,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-20 17:36:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:24,090 INFO L225 Difference]: With dead ends: 73 [2020-07-20 17:36:24,091 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:36:24,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:36:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 17:36:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 17:36:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-20 17:36:24,149 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-20 17:36:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:24,149 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-20 17:36:24,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:36:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-20 17:36:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 17:36:24,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:24,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:24,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:24,362 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-20 17:36:24,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:24,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392190565] [2020-07-20 17:36:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:24,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:24,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:24,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 17:36:24,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:24,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392190565] [2020-07-20 17:36:24,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:24,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:36:24,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718013723] [2020-07-20 17:36:24,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:36:24,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:36:24,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:24,523 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2020-07-20 17:36:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:24,622 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-20 17:36:24,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:36:24,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-07-20 17:36:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:24,627 INFO L225 Difference]: With dead ends: 65 [2020-07-20 17:36:24,628 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:36:24,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:36:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 17:36:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 17:36:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 17:36:24,645 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-20 17:36:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:24,646 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 17:36:24,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:36:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 17:36:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 17:36:24,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:24,650 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:24,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:24,863 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:24,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:24,864 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-07-20 17:36:24,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:24,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489032728] [2020-07-20 17:36:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:24,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:24,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:24,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:36:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 17:36:24,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 17:36:25,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489032728] [2020-07-20 17:36:25,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:25,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-20 17:36:25,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613290421] [2020-07-20 17:36:25,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 17:36:25,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 17:36:25,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:36:25,128 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 8 states. [2020-07-20 17:36:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:25,294 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-20 17:36:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:36:25,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-07-20 17:36:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:25,296 INFO L225 Difference]: With dead ends: 67 [2020-07-20 17:36:25,297 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 17:36:25,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:36:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 17:36:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-07-20 17:36:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 17:36:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-20 17:36:25,307 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-07-20 17:36:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:25,307 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-20 17:36:25,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 17:36:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-20 17:36:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 17:36:25,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:25,310 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:25,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:25,524 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:25,525 INFO L82 PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times [2020-07-20 17:36:25,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:25,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23867536] [2020-07-20 17:36:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:25,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:25,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:25,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 17:36:25,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:25,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23867536] [2020-07-20 17:36:25,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:25,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:36:25,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687283103] [2020-07-20 17:36:25,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:36:25,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:36:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:25,618 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-07-20 17:36:25,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:25,703 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-07-20 17:36:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:36:25,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-07-20 17:36:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:25,707 INFO L225 Difference]: With dead ends: 65 [2020-07-20 17:36:25,708 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 17:36:25,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 17:36:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-07-20 17:36:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 17:36:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-20 17:36:25,722 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2020-07-20 17:36:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:25,723 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-20 17:36:25,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:36:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-20 17:36:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 17:36:25,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:25,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:25,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:25,941 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times [2020-07-20 17:36:25,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:25,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375118749] [2020-07-20 17:36:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:26,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:26,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:36:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-20 17:36:26,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 17:36:26,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375118749] [2020-07-20 17:36:26,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:26,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-20 17:36:26,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326675725] [2020-07-20 17:36:26,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 17:36:26,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 17:36:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:36:26,163 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-07-20 17:36:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:26,299 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-20 17:36:26,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:36:26,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-20 17:36:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:26,303 INFO L225 Difference]: With dead ends: 70 [2020-07-20 17:36:26,303 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 17:36:26,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:36:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 17:36:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-20 17:36:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 17:36:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-20 17:36:26,327 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51 [2020-07-20 17:36:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:26,329 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-20 17:36:26,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 17:36:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-20 17:36:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-20 17:36:26,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:26,331 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:26,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:26,534 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times [2020-07-20 17:36:26,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:26,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042277684] [2020-07-20 17:36:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:26,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:26,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:26,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:26,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 17:36:26,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:26,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042277684] [2020-07-20 17:36:26,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:26,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:36:26,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923947128] [2020-07-20 17:36:26,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:36:26,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:26,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:36:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:26,678 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 4 states. [2020-07-20 17:36:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:26,768 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-07-20 17:36:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:36:26,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-20 17:36:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:26,771 INFO L225 Difference]: With dead ends: 69 [2020-07-20 17:36:26,772 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 17:36:26,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 17:36:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 17:36:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 17:36:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 17:36:26,781 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60 [2020-07-20 17:36:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:26,782 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 17:36:26,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:36:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 17:36:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 17:36:26,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:26,785 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:26,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:27,000 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:27,001 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times [2020-07-20 17:36:27,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:27,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121209463] [2020-07-20 17:36:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:27,087 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:27,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 17:36:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 17:36:27,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:27,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121209463] [2020-07-20 17:36:27,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:27,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 17:36:27,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258556319] [2020-07-20 17:36:27,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:36:27,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:36:27,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:36:27,205 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2020-07-20 17:36:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:27,290 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-20 17:36:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:36:27,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-20 17:36:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:27,293 INFO L225 Difference]: With dead ends: 74 [2020-07-20 17:36:27,293 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 17:36:27,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:36:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 17:36:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-20 17:36:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 17:36:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-20 17:36:27,308 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-20 17:36:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:27,308 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-20 17:36:27,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:36:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-20 17:36:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 17:36:27,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:27,311 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:27,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:27,527 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-20 17:36:27,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:27,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940828492] [2020-07-20 17:36:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:27,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:27,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:27,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:36:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 17:36:27,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 17:36:27,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940828492] [2020-07-20 17:36:27,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:27,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 17:36:27,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101232540] [2020-07-20 17:36:27,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:36:27,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:27,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:36:27,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:36:27,945 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states. [2020-07-20 17:36:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:28,222 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2020-07-20 17:36:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 17:36:28,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 17:36:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:28,224 INFO L225 Difference]: With dead ends: 139 [2020-07-20 17:36:28,224 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 17:36:28,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:36:28,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 17:36:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-20 17:36:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 17:36:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-07-20 17:36:28,241 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 65 [2020-07-20 17:36:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:28,242 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-07-20 17:36:28,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:36:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-07-20 17:36:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 17:36:28,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:28,244 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:28,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:28,461 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-20 17:36:28,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:28,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806657702] [2020-07-20 17:36:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:28,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:28,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:28,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:36:28,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 17:36:28,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 17:36:28,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806657702] [2020-07-20 17:36:28,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:28,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 17:36:28,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652514172] [2020-07-20 17:36:28,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:36:28,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:28,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:36:28,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:36:28,830 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 13 states. [2020-07-20 17:36:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:29,085 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2020-07-20 17:36:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 17:36:29,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-07-20 17:36:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:29,087 INFO L225 Difference]: With dead ends: 129 [2020-07-20 17:36:29,088 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 17:36:29,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:36:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 17:36:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2020-07-20 17:36:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 17:36:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-07-20 17:36:29,104 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 67 [2020-07-20 17:36:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:29,104 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-07-20 17:36:29,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:36:29,104 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-07-20 17:36:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 17:36:29,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:29,107 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:29,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:29,321 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-20 17:36:29,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:29,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087394270] [2020-07-20 17:36:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:29,444 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:29,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:29,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:36:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-20 17:36:29,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-20 17:36:29,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087394270] [2020-07-20 17:36:29,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:29,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 17:36:29,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30231259] [2020-07-20 17:36:29,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 17:36:29,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:29,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 17:36:29,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 17:36:29,655 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-07-20 17:36:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:29,816 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-20 17:36:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:36:29,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-07-20 17:36:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:29,819 INFO L225 Difference]: With dead ends: 86 [2020-07-20 17:36:29,819 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 17:36:29,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:36:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 17:36:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-07-20 17:36:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 17:36:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-20 17:36:29,838 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 73 [2020-07-20 17:36:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:29,839 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-20 17:36:29,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 17:36:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-20 17:36:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 17:36:29,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:29,842 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:30,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:30,056 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:30,056 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-20 17:36:30,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:30,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653977097] [2020-07-20 17:36:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:30,339 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:30,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:36:30,340 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:36:30,420 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:30,483 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:36:30,484 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:36:30,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:30,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:36:30 BoogieIcfgContainer [2020-07-20 17:36:30,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:36:30,790 INFO L168 Benchmark]: Toolchain (without parser) took 8460.28 ms. Allocated memory was 137.4 MB in the beginning and 273.2 MB in the end (delta: 135.8 MB). Free memory was 101.9 MB in the beginning and 172.5 MB in the end (delta: -70.6 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:30,791 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:36:30,791 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.55 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:30,792 INFO L168 Benchmark]: Boogie Preprocessor took 207.45 ms. Allocated memory was 137.4 MB in the beginning and 203.9 MB in the end (delta: 66.6 MB). Free memory was 91.1 MB in the beginning and 181.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:30,793 INFO L168 Benchmark]: RCFGBuilder took 483.85 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:30,794 INFO L168 Benchmark]: TraceAbstraction took 7442.10 ms. Allocated memory was 203.9 MB in the beginning and 273.2 MB in the end (delta: 69.2 MB). Free memory was 162.0 MB in the beginning and 172.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 58.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:30,797 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.55 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.45 ms. Allocated memory was 137.4 MB in the beginning and 203.9 MB in the end (delta: 66.6 MB). Free memory was 91.1 MB in the beginning and 181.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 483.85 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7442.10 ms. Allocated memory was 203.9 MB in the beginning and 273.2 MB in the end (delta: 69.2 MB). Free memory was 162.0 MB in the beginning and 172.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 58.7 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=1, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=1, 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=1, temp=2, x={2:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=1, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=1, ret=1, temp=2, x={2:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=1, ret2=1, temp=3, 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=3, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=3, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=3, ret=1, ret2=1, temp=3, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=1, ret2=1, ret5=3, temp=3, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=1, ret2=1, ret5=3, temp=3, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.2s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 329 SDtfs, 280 SDslu, 591 SDs, 0 SdLazy, 640 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 832 GetRequests, 745 SyntacticMatches, 22 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 40 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 611 NumberOfCodeBlocks, 432 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 817 ConstructedInterpolants, 0 QuantifiedInterpolants, 98205 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1424 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 957/1066 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...