/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:10:52,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:10:52,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:10:52,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:10:52,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:10:52,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:10:52,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:10:52,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:10:52,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:10:52,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:10:52,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:10:52,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:10:52,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:10:52,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:10:52,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:10:52,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:10:52,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:10:52,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:10:52,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:10:52,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:10:52,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:10:52,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:10:52,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:10:52,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:10:52,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:10:52,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:10:52,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:10:52,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:10:52,667 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:10:52,703 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:10:52,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:10:52,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:10:52,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:10:52,709 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:10:52,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:10:52,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:10:52,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:10:52,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:10:52,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:10:52,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:10:52,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:10:52,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:10:52,713 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:10:52,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:10:52,713 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:10:52,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:10:52,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:10:52,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:10:52,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:10:52,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:10:52,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:10:52,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:10:52,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:10:52,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:10:52,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:10:52,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:10:52,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:10:52,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:10:52,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:10:53,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:10:53,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:10:53,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:10:53,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:10:53,049 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:10:53,049 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-07-21 02:10:53,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/998686a04/e74b1f447c5e46aebaf5c187dc11da13/FLAG337ceb36e [2020-07-21 02:10:53,584 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:10:53,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-07-21 02:10:53,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/998686a04/e74b1f447c5e46aebaf5c187dc11da13/FLAG337ceb36e [2020-07-21 02:10:53,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/998686a04/e74b1f447c5e46aebaf5c187dc11da13 [2020-07-21 02:10:53,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:10:53,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:10:53,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:10:53,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:10:53,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:10:53,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:10:53" (1/1) ... [2020-07-21 02:10:53,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cca1c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:53, skipping insertion in model container [2020-07-21 02:10:53,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:10:53" (1/1) ... [2020-07-21 02:10:53,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:10:53,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:10:54,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:10:54,278 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:10:54,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:10:54,318 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:10:54,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54 WrapperNode [2020-07-21 02:10:54,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:10:54,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:10:54,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:10:54,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:10:54,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (1/1) ... [2020-07-21 02:10:54,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (1/1) ... [2020-07-21 02:10:54,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (1/1) ... [2020-07-21 02:10:54,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (1/1) ... [2020-07-21 02:10:54,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (1/1) ... [2020-07-21 02:10:54,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (1/1) ... [2020-07-21 02:10:54,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (1/1) ... [2020-07-21 02:10:54,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:10:54,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:10:54,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:10:54,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:10:54,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:10:54,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:10:54,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:10:54,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:10:54,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 02:10:54,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:10:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:10:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:10:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:10:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 02:10:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 02:10:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:10:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:10:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:10:54,859 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:10:54,859 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 02:10:54,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:10:54 BoogieIcfgContainer [2020-07-21 02:10:54,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:10:54,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:10:54,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:10:54,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:10:54,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:10:53" (1/3) ... [2020-07-21 02:10:54,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d7ff26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:10:54, skipping insertion in model container [2020-07-21 02:10:54,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:10:54" (2/3) ... [2020-07-21 02:10:54,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d7ff26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:10:54, skipping insertion in model container [2020-07-21 02:10:54,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:10:54" (3/3) ... [2020-07-21 02:10:54,876 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-07-21 02:10:54,888 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:10:54,896 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:10:54,911 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:10:54,940 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:10:54,940 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:10:54,940 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:10:54,941 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:10:54,941 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:10:54,942 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:10:54,942 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:10:54,942 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:10:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 02:10:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 02:10:54,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:10:54,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:10:54,969 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:10:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:10:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash -684006215, now seen corresponding path program 1 times [2020-07-21 02:10:54,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:10:54,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690702164] [2020-07-21 02:10:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:10:55,075 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:10:55,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:10:55,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 02:10:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:10:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:10:55,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:10:55,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690702164] [2020-07-21 02:10:55,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:10:55,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:10:55,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174462411] [2020-07-21 02:10:55,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:10:55,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:10:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:10:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:10:55,450 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-21 02:10:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:10:55,730 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2020-07-21 02:10:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:10:55,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-21 02:10:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:10:55,746 INFO L225 Difference]: With dead ends: 74 [2020-07-21 02:10:55,747 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 02:10:55,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:10:55,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 02:10:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 02:10:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 02:10:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-21 02:10:55,806 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 14 [2020-07-21 02:10:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:10:55,807 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-21 02:10:55,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:10:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-21 02:10:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 02:10:55,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:10:55,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:10:56,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:10:56,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:10:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:10:56,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1563298987, now seen corresponding path program 1 times [2020-07-21 02:10:56,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:10:56,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542989562] [2020-07-21 02:10:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:10:56,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:10:56,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:10:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 02:10:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:10:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:10:56,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:10:56,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:10:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 02:10:56,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542989562] [2020-07-21 02:10:56,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 02:10:56,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-21 02:10:56,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319771843] [2020-07-21 02:10:56,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 02:10:56,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:10:56,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 02:10:56,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 02:10:56,611 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 6 states. [2020-07-21 02:11:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:11:23,892 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-07-21 02:11:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 02:11:23,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-07-21 02:11:23,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:11:23,895 INFO L225 Difference]: With dead ends: 58 [2020-07-21 02:11:23,895 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 02:11:23,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 02:11:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 02:11:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-21 02:11:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 02:11:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-21 02:11:23,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 29 [2020-07-21 02:11:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:11:23,915 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-21 02:11:23,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 02:11:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-21 02:11:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 02:11:23,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:11:23,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:11:24,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:24,131 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:11:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:11:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash -908789750, now seen corresponding path program 1 times [2020-07-21 02:11:24,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:11:24,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974474045] [2020-07-21 02:11:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:24,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:11:24,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:11:24,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 02:11:24,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 02:11:24,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:11:24,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 6 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 02:11:27,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974474045] [2020-07-21 02:11:27,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:11:27,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2020-07-21 02:11:27,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982486534] [2020-07-21 02:11:27,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 02:11:27,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:11:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 02:11:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2020-07-21 02:11:27,152 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 14 states. [2020-07-21 02:11:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:11:50,367 INFO L93 Difference]: Finished difference Result 103 states and 144 transitions. [2020-07-21 02:11:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 02:11:50,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-07-21 02:11:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:11:50,370 INFO L225 Difference]: With dead ends: 103 [2020-07-21 02:11:50,370 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 02:11:50,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=41, Invalid=168, Unknown=1, NotChecked=0, Total=210 [2020-07-21 02:11:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 02:11:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-07-21 02:11:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 02:11:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-07-21 02:11:50,382 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 38 [2020-07-21 02:11:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:11:50,383 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-07-21 02:11:50,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 02:11:50,383 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-07-21 02:11:50,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 02:11:50,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:11:50,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:11:50,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:50,588 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:11:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:11:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1051834481, now seen corresponding path program 1 times [2020-07-21 02:11:50,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:11:50,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579343206] [2020-07-21 02:11:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:50,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:11:50,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:11:50,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 02:11:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 02:11:51,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:11:51,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 0 refuted. 13 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 02:11:55,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579343206] [2020-07-21 02:11:55,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:11:55,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2020-07-21 02:11:55,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562387709] [2020-07-21 02:11:55,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 02:11:55,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:11:55,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 02:11:55,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=195, Unknown=2, NotChecked=0, Total=240 [2020-07-21 02:11:55,934 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 16 states. [2020-07-21 02:12:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:12:33,099 INFO L93 Difference]: Finished difference Result 117 states and 157 transitions. [2020-07-21 02:12:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 02:12:33,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-07-21 02:12:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:12:33,101 INFO L225 Difference]: With dead ends: 117 [2020-07-21 02:12:33,102 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 02:12:33,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=47, Invalid=223, Unknown=2, NotChecked=0, Total=272 [2020-07-21 02:12:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 02:12:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-21 02:12:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 02:12:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-07-21 02:12:33,113 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-07-21 02:12:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:12:33,114 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-07-21 02:12:33,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 02:12:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-07-21 02:12:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 02:12:33,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:12:33,116 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:12:33,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:12:33,320 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:12:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:12:33,321 INFO L82 PathProgramCache]: Analyzing trace with hash -850530640, now seen corresponding path program 1 times [2020-07-21 02:12:33,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:12:33,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580143103] [2020-07-21 02:12:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:12:33,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:12:33,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:12:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 02:12:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:12:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 02:12:33,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:12:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 02:12:33,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580143103] [2020-07-21 02:12:33,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:12:33,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 02:12:33,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165528063] [2020-07-21 02:12:33,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 02:12:33,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:12:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 02:12:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-21 02:12:33,577 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 12 states. [2020-07-21 02:12:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:12:39,494 INFO L93 Difference]: Finished difference Result 357 states and 559 transitions. [2020-07-21 02:12:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 02:12:39,495 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-07-21 02:12:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:12:39,500 INFO L225 Difference]: With dead ends: 357 [2020-07-21 02:12:39,501 INFO L226 Difference]: Without dead ends: 325 [2020-07-21 02:12:39,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-07-21 02:12:39,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-07-21 02:12:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 311. [2020-07-21 02:12:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-07-21 02:12:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 474 transitions. [2020-07-21 02:12:39,550 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 474 transitions. Word has length 67 [2020-07-21 02:12:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:12:39,550 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 474 transitions. [2020-07-21 02:12:39,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 02:12:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 474 transitions. [2020-07-21 02:12:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 02:12:39,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:12:39,554 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:12:39,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:12:39,766 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:12:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:12:39,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2066624618, now seen corresponding path program 1 times [2020-07-21 02:12:39,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:12:39,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239554435] [2020-07-21 02:12:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:12:39,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:12:39,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:12:39,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 02:12:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:12:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 10 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 02:12:40,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:12:40,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:12:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 18 proven. 0 refuted. 54 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 02:12:57,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239554435] [2020-07-21 02:12:57,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:12:57,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 22 [2020-07-21 02:12:57,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051581735] [2020-07-21 02:12:57,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 02:12:57,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:12:57,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 02:12:57,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=380, Unknown=5, NotChecked=0, Total=462 [2020-07-21 02:12:57,904 INFO L87 Difference]: Start difference. First operand 311 states and 474 transitions. Second operand 22 states. [2020-07-21 02:14:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:14:27,870 INFO L93 Difference]: Finished difference Result 624 states and 991 transitions. [2020-07-21 02:14:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 02:14:27,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-07-21 02:14:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:14:27,875 INFO L225 Difference]: With dead ends: 624 [2020-07-21 02:14:27,875 INFO L226 Difference]: Without dead ends: 383 [2020-07-21 02:14:27,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=81, Invalid=420, Unknown=5, NotChecked=0, Total=506 [2020-07-21 02:14:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-07-21 02:14:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 380. [2020-07-21 02:14:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-07-21 02:14:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 582 transitions. [2020-07-21 02:14:27,933 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 582 transitions. Word has length 82 [2020-07-21 02:14:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:14:27,936 INFO L479 AbstractCegarLoop]: Abstraction has 380 states and 582 transitions. [2020-07-21 02:14:27,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 02:14:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 582 transitions. [2020-07-21 02:14:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 02:14:27,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:14:27,942 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:14:28,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:14:28,160 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:14:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:14:28,161 INFO L82 PathProgramCache]: Analyzing trace with hash 753532585, now seen corresponding path program 1 times [2020-07-21 02:14:28,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:14:28,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918452741] [2020-07-21 02:14:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:14:28,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:14:28,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:14:28,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 02:14:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:14:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-21 02:14:28,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:14:28,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:14:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 17 proven. 0 refuted. 65 times theorem prover too weak. 134 trivial. 0 not checked. [2020-07-21 02:14:51,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918452741] [2020-07-21 02:14:51,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:14:51,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 25 [2020-07-21 02:14:51,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983424905] [2020-07-21 02:14:51,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 02:14:51,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:14:51,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 02:14:51,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=496, Unknown=10, NotChecked=0, Total=600 [2020-07-21 02:14:51,570 INFO L87 Difference]: Start difference. First operand 380 states and 582 transitions. Second operand 25 states. [2020-07-21 02:15:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:15:53,861 INFO L93 Difference]: Finished difference Result 1017 states and 1628 transitions. [2020-07-21 02:15:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 02:15:53,862 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 93 [2020-07-21 02:15:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:15:53,872 INFO L225 Difference]: With dead ends: 1017 [2020-07-21 02:15:53,872 INFO L226 Difference]: Without dead ends: 711 [2020-07-21 02:15:53,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 151 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=98, Invalid=542, Unknown=10, NotChecked=0, Total=650 [2020-07-21 02:15:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-07-21 02:15:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 691. [2020-07-21 02:15:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-07-21 02:15:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1095 transitions. [2020-07-21 02:15:53,913 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1095 transitions. Word has length 93 [2020-07-21 02:15:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:15:53,914 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 1095 transitions. [2020-07-21 02:15:53,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 02:15:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1095 transitions. [2020-07-21 02:15:53,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-07-21 02:15:53,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:15:53,917 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:15:54,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:15:54,131 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:15:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:15:54,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1159422209, now seen corresponding path program 1 times [2020-07-21 02:15:54,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:15:54,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87707995] [2020-07-21 02:15:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:15:54,251 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:15:54,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:15:54,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-21 02:15:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:15:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 16 proven. 215 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 02:15:55,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:15:55,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:16:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 87 proven. 0 refuted. 24 times theorem prover too weak. 232 trivial. 0 not checked. [2020-07-21 02:16:20,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87707995] [2020-07-21 02:16:20,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:16:20,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 28 [2020-07-21 02:16:20,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092318924] [2020-07-21 02:16:20,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 02:16:20,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:16:20,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 02:16:20,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=647, Unknown=5, NotChecked=0, Total=756 [2020-07-21 02:16:20,452 INFO L87 Difference]: Start difference. First operand 691 states and 1095 transitions. Second operand 28 states. [2020-07-21 02:16:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:16:31,876 INFO L93 Difference]: Finished difference Result 967 states and 1548 transitions. [2020-07-21 02:16:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 02:16:31,877 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 111 [2020-07-21 02:16:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:16:31,878 INFO L225 Difference]: With dead ends: 967 [2020-07-21 02:16:31,878 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 02:16:31,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 179 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=108, Invalid=699, Unknown=5, NotChecked=0, Total=812 [2020-07-21 02:16:31,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 02:16:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 02:16:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 02:16:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 02:16:31,888 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 111 [2020-07-21 02:16:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:16:31,889 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 02:16:31,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 02:16:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 02:16:31,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 02:16:32,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:16:32,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 02:16:32,315 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 98 [2020-07-21 02:16:34,996 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 98 DAG size of output: 18 [2020-07-21 02:16:35,108 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 18 [2020-07-21 02:16:35,115 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 02:16:35,115 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 02:16:35,115 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 02:16:35,115 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 02:16:35,116 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 02:16:35,116 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 02:16:35,116 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 02:16:35,116 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 02:16:35,116 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 02:16:35,116 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 02:16:35,117 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 02:16:35,117 INFO L268 CegarLoopResult]: For program point L35-2(lines 21 38) no Hoare annotation was computed. [2020-07-21 02:16:35,117 INFO L268 CegarLoopResult]: For program point L31(lines 31 38) no Hoare annotation was computed. [2020-07-21 02:16:35,117 INFO L268 CegarLoopResult]: For program point L27(lines 27 38) no Hoare annotation was computed. [2020-07-21 02:16:35,117 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 43) no Hoare annotation was computed. [2020-07-21 02:16:35,117 INFO L268 CegarLoopResult]: For program point L23(lines 23 38) no Hoare annotation was computed. [2020-07-21 02:16:35,117 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 41) no Hoare annotation was computed. [2020-07-21 02:16:35,118 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (= (mod (+ main_~i~0 main_~j~0 main_~k~0 main_~v1~0 main_~v2~0 main_~v3~0 main_~v4~0 main_~v5~0 main_~v6~0 2) 4294967296) (mod (+ main_~l~0 2) 4294967296)) [2020-07-21 02:16:35,118 INFO L264 CegarLoopResult]: At program point L40-1(lines 19 41) the Hoare annotation is: (= (mod (+ main_~i~0 main_~j~0 main_~k~0 main_~v1~0 main_~v2~0 main_~v3~0 main_~v4~0 main_~v5~0 main_~v6~0 2) 4294967296) (mod (+ main_~l~0 2) 4294967296)) [2020-07-21 02:16:35,118 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 02:16:35,118 INFO L268 CegarLoopResult]: For program point L29(lines 29 38) no Hoare annotation was computed. [2020-07-21 02:16:35,118 INFO L268 CegarLoopResult]: For program point L25(lines 25 38) no Hoare annotation was computed. [2020-07-21 02:16:35,118 INFO L268 CegarLoopResult]: For program point L21(lines 21 38) no Hoare annotation was computed. [2020-07-21 02:16:35,119 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 43) no Hoare annotation was computed. [2020-07-21 02:16:35,119 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 43) the Hoare annotation is: true [2020-07-21 02:16:35,119 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-21 02:16:35,119 INFO L268 CegarLoopResult]: For program point L35(lines 35 38) no Hoare annotation was computed. [2020-07-21 02:16:35,119 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 02:16:35,120 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 02:16:35,120 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 02:16:35,120 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 02:16:35,120 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 02:16:35,120 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 02:16:35,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:16:35 BoogieIcfgContainer [2020-07-21 02:16:35,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 02:16:35,144 INFO L168 Benchmark]: Toolchain (without parser) took 341216.66 ms. Allocated memory was 145.2 MB in the beginning and 246.9 MB in the end (delta: 101.7 MB). Free memory was 103.7 MB in the beginning and 157.9 MB in the end (delta: -54.2 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-07-21 02:16:35,145 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 02:16:35,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.87 ms. Allocated memory is still 145.2 MB. Free memory was 103.3 MB in the beginning and 93.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 02:16:35,147 INFO L168 Benchmark]: Boogie Preprocessor took 143.35 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 93.1 MB in the beginning and 182.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 02:16:35,147 INFO L168 Benchmark]: RCFGBuilder took 401.23 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 165.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-21 02:16:35,148 INFO L168 Benchmark]: TraceAbstraction took 340275.79 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 165.1 MB in the beginning and 157.9 MB in the end (delta: 7.2 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. [2020-07-21 02:16:35,152 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 387.87 ms. Allocated memory is still 145.2 MB. Free memory was 103.3 MB in the beginning and 93.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.35 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 93.1 MB in the beginning and 182.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 401.23 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 165.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 340275.79 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 165.1 MB in the beginning and 157.9 MB in the end (delta: 7.2 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (i + j + k + v1 + v2 + v3 + v4 + v5 + v6 + 2) % 4294967296 == (l + 2) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 337.1s, OverallIterations: 8, TraceHistogramMax: 9, AutomataDifference: 257.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 153 SDtfs, 504 SDslu, 889 SDs, 0 SdLazy, 4149 SolverSat, 173 SolverUnsat, 117 SolverUnknown, 0 SolverNotchecked, 244.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 988 GetRequests, 779 SyntacticMatches, 63 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 79.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=691occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 37 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 191 PreInvPairs, 270 NumberOfFragments, 43 HoareAnnotationTreeSize, 191 FomulaSimplifications, 2625 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 7 FomulaSimplificationsInter, 853 FormulaSimplificationTreeSizeReductionInter, 2.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 76.7s InterpolantComputationTime, 488 NumberOfCodeBlocks, 488 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 947 ConstructedInterpolants, 0 QuantifiedInterpolants, 1038579 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1041 ConjunctsInSsa, 300 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 991/1778 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 correct! Received shutdown request...