/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_FUNCTIONS --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 14:14:29,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:14:29,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:14:29,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:14:29,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:14:29,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:14:29,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:14:29,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:14:29,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:14:29,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:14:29,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:14:29,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:14:29,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:14:29,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:14:29,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:14:29,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:14:29,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:14:29,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:14:29,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:14:29,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:14:29,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:14:29,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:14:29,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:14:29,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:14:29,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:14:29,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:14:29,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:14:29,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:14:29,377 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 14:14:29,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:14:29,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:14:29,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:14:29,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:14:29,401 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:14:29,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:14:29,401 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:14:29,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:14:29,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:14:29,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:14:29,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:14:29,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:14:29,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:14:29,403 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:14:29,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:14:29,403 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:14:29,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:14:29,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:14:29,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:14:29,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:14:29,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:14:29,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:14:29,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:14:29,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:14:29,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:14:29,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:14:29,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:29,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:14:29,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:14:29,406 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_FUNCTIONS 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 14:14:29,668 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:14:29,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:14:29,684 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:14:29,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:14:29,686 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:14:29,686 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 14:14:29,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5778ee9/25f4a42c4c6549c583152eea4eae2a3c/FLAG0c5f285e7 [2020-07-20 14:14:30,189 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:14:30,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 14:14:30,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5778ee9/25f4a42c4c6549c583152eea4eae2a3c/FLAG0c5f285e7 [2020-07-20 14:14:30,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5778ee9/25f4a42c4c6549c583152eea4eae2a3c [2020-07-20 14:14:30,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:14:30,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:14:30,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:30,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:14:30,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:14:30,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:30,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416ba85b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30, skipping insertion in model container [2020-07-20 14:14:30,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:30,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:14:30,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:14:30,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:30,849 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:14:30,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:30,891 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:14:30,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30 WrapperNode [2020-07-20 14:14:30,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:30,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:14:30,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:14:30,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:14:30,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:30,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:30,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:30,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:31,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:31,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:31,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (1/1) ... [2020-07-20 14:14:31,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:14:31,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:14:31,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:14:31,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:14:31,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (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 14:14:31,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:14:31,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:14:31,086 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 14:14:31,086 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 14:14:31,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:14:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:14:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:14:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 14:14:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:14:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 14:14:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:14:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:14:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:14:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:14:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:14:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:14:31,452 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:14:31,453 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 14:14:31,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:31 BoogieIcfgContainer [2020-07-20 14:14:31,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:14:31,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:14:31,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:14:31,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:14:31,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:14:30" (1/3) ... [2020-07-20 14:14:31,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30802217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:31, skipping insertion in model container [2020-07-20 14:14:31,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:30" (2/3) ... [2020-07-20 14:14:31,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30802217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:31, skipping insertion in model container [2020-07-20 14:14:31,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:31" (3/3) ... [2020-07-20 14:14:31,465 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-20 14:14:31,476 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:14:31,483 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:14:31,497 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:14:31,523 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:14:31,523 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:14:31,523 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:14:31,523 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:14:31,524 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:14:31,524 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:14:31,524 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:14:31,524 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:14:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-20 14:14:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 14:14:31,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:31,552 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 14:14:31,553 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-20 14:14:31,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:31,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379322000] [2020-07-20 14:14:31,567 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 14:14:31,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 14:14:31,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:31,751 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 14:14:31,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:31,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379322000] [2020-07-20 14:14:31,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:31,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:14:31,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673029952] [2020-07-20 14:14:31,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:14:31,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:31,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:14:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:31,778 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-07-20 14:14:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:31,999 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 14:14:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:14:32,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-20 14:14:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:32,019 INFO L225 Difference]: With dead ends: 73 [2020-07-20 14:14:32,020 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 14:14:32,026 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 14:14:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 14:14:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 14:14:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 14:14:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-20 14:14:32,090 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-20 14:14:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:32,090 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-20 14:14:32,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:14:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-20 14:14:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 14:14:32,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:32,094 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 14:14:32,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:32,296 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:32,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-20 14:14:32,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:32,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842578593] [2020-07-20 14:14:32,300 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 14:14:32,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:32,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 14:14:32,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:32,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842578593] [2020-07-20 14:14:32,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:32,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:14:32,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764208533] [2020-07-20 14:14:32,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:14:32,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:32,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:14:32,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:32,485 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2020-07-20 14:14:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:32,575 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-07-20 14:14:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:14:32,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-07-20 14:14:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:32,578 INFO L225 Difference]: With dead ends: 56 [2020-07-20 14:14:32,578 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 14:14:32,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 14:14:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 14:14:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 14:14:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 14:14:32,598 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-20 14:14:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:32,599 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 14:14:32,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:14:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 14:14:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 14:14:32,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:32,607 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 14:14:32,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:32,822 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash -759897477, now seen corresponding path program 1 times [2020-07-20 14:14:32,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:32,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528342867] [2020-07-20 14:14:32,824 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 14:14:32,895 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:32,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:14:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 14:14:32,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:32,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528342867] [2020-07-20 14:14:32,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:32,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:14:32,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817500767] [2020-07-20 14:14:32,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:14:32,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:14:32,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:32,955 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-07-20 14:14:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:33,018 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-20 14:14:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:14:33,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-07-20 14:14:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:33,020 INFO L225 Difference]: With dead ends: 67 [2020-07-20 14:14:33,020 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 14:14:33,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 14:14:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 14:14:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 14:14:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-20 14:14:33,029 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 40 [2020-07-20 14:14:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:33,030 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-20 14:14:33,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:14:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-20 14:14:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 14:14:33,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:33,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:14:33,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:33,246 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:33,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1437163047, now seen corresponding path program 1 times [2020-07-20 14:14:33,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:33,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737461222] [2020-07-20 14:14:33,249 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 14:14:33,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:33,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:33,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:14:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 14:14:33,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 14:14:33,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737461222] [2020-07-20 14:14:33,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:33,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-20 14:14:33,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488508434] [2020-07-20 14:14:33,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:14:33,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:14:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:14:33,514 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-07-20 14:14:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:33,639 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-07-20 14:14:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:14:33,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-07-20 14:14:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:33,640 INFO L225 Difference]: With dead ends: 69 [2020-07-20 14:14:33,641 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 14:14:33,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:14:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 14:14:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 14:14:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 14:14:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 14:14:33,649 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2020-07-20 14:14:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:33,650 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 14:14:33,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:14:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 14:14:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 14:14:33,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:33,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:14:33,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:33,865 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:33,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:33,866 INFO L82 PathProgramCache]: Analyzing trace with hash 545653175, now seen corresponding path program 2 times [2020-07-20 14:14:33,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:33,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971913364] [2020-07-20 14:14:33,867 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 14:14:33,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:33,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 14:14:33,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:33,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971913364] [2020-07-20 14:14:33,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:33,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:14:33,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597602617] [2020-07-20 14:14:33,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:14:33,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:33,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:14:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:33,970 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2020-07-20 14:14:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:34,036 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-07-20 14:14:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:14:34,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-07-20 14:14:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:34,038 INFO L225 Difference]: With dead ends: 67 [2020-07-20 14:14:34,039 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 14:14:34,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 14:14:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 14:14:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 14:14:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-07-20 14:14:34,054 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 44 [2020-07-20 14:14:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:34,059 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-07-20 14:14:34,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:14:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-07-20 14:14:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 14:14:34,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:34,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:14:34,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:34,262 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2870664, now seen corresponding path program 1 times [2020-07-20 14:14:34,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:34,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503569430] [2020-07-20 14:14:34,264 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 14:14:34,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:34,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:34,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:14:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 14:14:34,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 14:14:34,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503569430] [2020-07-20 14:14:34,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:34,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-20 14:14:34,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415088175] [2020-07-20 14:14:34,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:14:34,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:14:34,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:14:34,489 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 8 states. [2020-07-20 14:14:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:34,636 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-07-20 14:14:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:14:34,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-07-20 14:14:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:34,639 INFO L225 Difference]: With dead ends: 72 [2020-07-20 14:14:34,639 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 14:14:34,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:14:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 14:14:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 14:14:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 14:14:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 14:14:34,662 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 53 [2020-07-20 14:14:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:34,663 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 14:14:34,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:14:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 14:14:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 14:14:34,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:34,665 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 14:14:34,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:34,866 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 2 times [2020-07-20 14:14:34,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:34,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304094403] [2020-07-20 14:14:34,867 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 14:14:34,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:34,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:34,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 14:14:34,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:35,053 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 14:14:35,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:35,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304094403] [2020-07-20 14:14:35,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:35,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 14:14:35,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091270299] [2020-07-20 14:14:35,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 14:14:35,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 14:14:35,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:14:35,056 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2020-07-20 14:14:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:35,167 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-20 14:14:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 14:14:35,167 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-20 14:14:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:35,169 INFO L225 Difference]: With dead ends: 74 [2020-07-20 14:14:35,169 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 14:14:35,170 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 14:14:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 14:14:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-20 14:14:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 14:14:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-20 14:14:35,181 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-20 14:14:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:35,182 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-20 14:14:35,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 14:14:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-20 14:14:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 14:14:35,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:35,184 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 14:14:35,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:35,399 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:35,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-20 14:14:35,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:35,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928902656] [2020-07-20 14:14:35,401 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 14:14:35,511 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:35,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:35,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 14:14:35,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:35,591 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 14:14:35,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:35,741 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 14:14:35,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928902656] [2020-07-20 14:14:35,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:35,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 14:14:35,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268540110] [2020-07-20 14:14:35,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 14:14:35,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 14:14:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 14:14:35,744 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states. [2020-07-20 14:14:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:36,026 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2020-07-20 14:14:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 14:14:36,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 14:14:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:36,032 INFO L225 Difference]: With dead ends: 139 [2020-07-20 14:14:36,033 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 14:14:36,034 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 14:14:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 14:14:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-20 14:14:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 14:14:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-07-20 14:14:36,059 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 65 [2020-07-20 14:14:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:36,060 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-07-20 14:14:36,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 14:14:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-07-20 14:14:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 14:14:36,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:36,064 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 14:14:36,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:36,268 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:36,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-20 14:14:36,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:36,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088808335] [2020-07-20 14:14:36,270 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 14:14:36,666 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:36,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 14:14:36,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:36,738 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 14:14:36,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:36,931 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 14:14:36,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088808335] [2020-07-20 14:14:36,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:36,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 14:14:36,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843104504] [2020-07-20 14:14:36,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 14:14:36,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 14:14:36,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 14:14:36,935 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 13 states. [2020-07-20 14:14:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:37,195 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2020-07-20 14:14:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 14:14:37,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-07-20 14:14:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:37,197 INFO L225 Difference]: With dead ends: 129 [2020-07-20 14:14:37,197 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 14:14:37,199 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 [2020-07-20 14:14:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 14:14:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2020-07-20 14:14:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 14:14:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-07-20 14:14:37,219 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 67 [2020-07-20 14:14:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:37,221 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-07-20 14:14:37,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 14:14:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-07-20 14:14:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 14:14:37,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:37,225 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 14:14:37,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:37,431 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:37,431 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-20 14:14:37,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:37,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214159414] [2020-07-20 14:14:37,435 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 14:14:37,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:37,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:37,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:14:37,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:37,797 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 14:14:37,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:37,889 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 14:14:37,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214159414] [2020-07-20 14:14:37,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:37,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 14:14:37,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100093470] [2020-07-20 14:14:37,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 14:14:37,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 14:14:37,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 14:14:37,891 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-07-20 14:14:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:38,016 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-20 14:14:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 14:14:38,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-07-20 14:14:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:38,018 INFO L225 Difference]: With dead ends: 86 [2020-07-20 14:14:38,018 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 14:14:38,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:14:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 14:14:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-07-20 14:14:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 14:14:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-20 14:14:38,039 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 73 [2020-07-20 14:14:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:38,039 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-20 14:14:38,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 14:14:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-20 14:14:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 14:14:38,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:38,041 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 14:14:38,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:38,257 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-20 14:14:38,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:38,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195167437] [2020-07-20 14:14:38,258 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 14:14:38,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:14:38,568 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:14:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:14:38,648 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:14:38,695 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:14:38,696 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:14:38,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:38,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:14:38 BoogieIcfgContainer [2020-07-20 14:14:38,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:14:38,984 INFO L168 Benchmark]: Toolchain (without parser) took 8418.48 ms. Allocated memory was 138.9 MB in the beginning and 277.3 MB in the end (delta: 138.4 MB). Free memory was 102.7 MB in the beginning and 160.8 MB in the end (delta: -58.1 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:38,996 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 14:14:38,997 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.40 ms. Allocated memory is still 138.9 MB. Free memory was 102.3 MB in the beginning and 91.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:38,998 INFO L168 Benchmark]: Boogie Preprocessor took 122.23 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:38,999 INFO L168 Benchmark]: RCFGBuilder took 441.33 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 162.1 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:39,003 INFO L168 Benchmark]: TraceAbstraction took 7523.73 ms. Allocated memory was 202.9 MB in the beginning and 277.3 MB in the end (delta: 74.4 MB). Free memory was 161.4 MB in the beginning and 160.8 MB in the end (delta: 626.5 kB). Peak memory consumption was 75.1 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:39,007 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.40 ms. Allocated memory is still 138.9 MB. Free memory was 102.3 MB in the beginning and 91.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.23 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 441.33 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 162.1 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7523.73 ms. Allocated memory was 202.9 MB in the beginning and 277.3 MB in the end (delta: 74.4 MB). Free memory was 161.4 MB in the beginning and 160.8 MB in the end (delta: 626.5 kB). Peak memory consumption was 75.1 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=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=0, 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=0, temp=2147483647, 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=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=0, ret=0, temp=2147483647, 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=0, ret2=0, temp=2, 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=2, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=2, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=2, ret=0, ret2=0, temp=2, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=0, ret2=0, ret5=2, temp=2, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=0, ret2=0, ret5=2, temp=2, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.3s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 329 SDtfs, 275 SDslu, 734 SDs, 0 SdLazy, 754 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 735 SyntacticMatches, 22 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s 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, 1.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 597 NumberOfCodeBlocks, 478 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 807 ConstructedInterpolants, 0 QuantifiedInterpolants, 94601 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1641 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 896/1005 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...