/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:24:34,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:24:34,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:24:34,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:24:34,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:24:34,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:24:34,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:24:34,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:24:34,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:24:34,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:24:34,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:24:34,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:24:34,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:24:34,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:24:34,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:24:34,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:24:34,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:24:34,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:24:34,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:24:34,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:24:34,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:24:34,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:24:34,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:24:34,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:24:34,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:24:34,596 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 13:24:34,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:24:34,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:24:34,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:24:34,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:24:34,620 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:24:34,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:24:34,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:24:34,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:24:34,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:24:34,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:24:34,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:24:34,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:24:34,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:24:34,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:24:34,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:24:34,623 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:24:34,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:24:34,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:24:34,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:24:34,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:24:34,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:24:34,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:24:34,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:24:34,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:24:34,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:24:34,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:24:34,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:34,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:24:34,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:24:34,628 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 -> 2 [2020-07-21 13:24:35,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:24:35,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:24:35,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:24:35,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:24:35,114 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:24:35,117 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-21 13:24:35,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/011f7c62a/1b55286b72544e19b29e3e8032abe47d/FLAGf86d869da [2020-07-21 13:24:35,662 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:24:35,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-21 13:24:35,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/011f7c62a/1b55286b72544e19b29e3e8032abe47d/FLAGf86d869da [2020-07-21 13:24:36,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/011f7c62a/1b55286b72544e19b29e3e8032abe47d [2020-07-21 13:24:36,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:24:36,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:24:36,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:24:36,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:24:36,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:24:36,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e44e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36, skipping insertion in model container [2020-07-21 13:24:36,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:24:36,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:24:36,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:24:36,321 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:24:36,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:24:36,361 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:24:36,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36 WrapperNode [2020-07-21 13:24:36,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:24:36,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:24:36,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:24:36,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:24:36,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (1/1) ... [2020-07-21 13:24:36,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:24:36,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:24:36,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:24:36,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:24:36,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (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 13:24:36,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:24:36,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:24:36,570 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 13:24:36,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:24:36,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:24:36,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:24:36,571 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 13:24:36,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:24:36,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:24:36,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:24:36,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:24:36,759 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:24:36,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:24:36 BoogieIcfgContainer [2020-07-21 13:24:36,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:24:36,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:24:36,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:24:36,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:24:36,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:24:36" (1/3) ... [2020-07-21 13:24:36,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c05a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:24:36, skipping insertion in model container [2020-07-21 13:24:36,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:36" (2/3) ... [2020-07-21 13:24:36,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c05a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:24:36, skipping insertion in model container [2020-07-21 13:24:36,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:24:36" (3/3) ... [2020-07-21 13:24:36,772 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-07-21 13:24:36,784 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:24:36,791 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:24:36,805 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:24:36,830 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:24:36,830 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:24:36,831 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:24:36,831 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:24:36,831 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:24:36,831 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:24:36,831 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:24:36,831 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:24:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 13:24:36,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:24:36,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:36,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:36,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 13:24:36,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:36,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224181722] [2020-07-21 13:24:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:24:36,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:36,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:24:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:37,139 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 13:24:37,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:24:37,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224181722] [2020-07-21 13:24:37,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:24:37,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:24:37,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737714958] [2020-07-21 13:24:37,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:24:37,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:24:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:24:37,165 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 13:24:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:37,253 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 13:24:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:24:37,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 13:24:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:37,267 INFO L225 Difference]: With dead ends: 30 [2020-07-21 13:24:37,267 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 13:24:37,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:24:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 13:24:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 13:24:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 13:24:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 13:24:37,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 13:24:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:37,321 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 13:24:37,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:24:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 13:24:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 13:24:37,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:37,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:37,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:37,540 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 13:24:37,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:37,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551516878] [2020-07-21 13:24:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:24:37,578 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:37,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:24:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 13:24:37,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:37,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:24:37,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551516878] [2020-07-21 13:24:37,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:37,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 13:24:37,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470721559] [2020-07-21 13:24:37,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:24:37,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:37,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:24:37,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:24:37,897 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-21 13:24:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:37,976 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 13:24:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:24:37,977 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-21 13:24:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:37,979 INFO L225 Difference]: With dead ends: 25 [2020-07-21 13:24:37,979 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 13:24:37,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:24:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 13:24:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 13:24:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 13:24:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 13:24:37,989 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 13:24:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:37,990 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 13:24:37,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:24:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 13:24:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 13:24:37,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:37,992 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:38,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:38,206 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:38,207 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-21 13:24:38,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:38,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996611800] [2020-07-21 13:24:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:24:38,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:38,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:24:38,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 13:24:38,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:38,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:38,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:38,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:38,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 13:24:38,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996611800] [2020-07-21 13:24:38,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:38,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 13:24:38,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497383057] [2020-07-21 13:24:38,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:24:38,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:38,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:24:38,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:24:38,730 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-21 13:24:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:38,805 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 13:24:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:24:38,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-21 13:24:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:38,808 INFO L225 Difference]: With dead ends: 28 [2020-07-21 13:24:38,808 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 13:24:38,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:24:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 13:24:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 13:24:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 13:24:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 13:24:38,816 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 13:24:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:38,816 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 13:24:38,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:24:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 13:24:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 13:24:38,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:38,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:39,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:39,032 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-21 13:24:39,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:39,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280581460] [2020-07-21 13:24:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:24:39,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:39,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:39,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:24:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 13:24:39,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:39,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:39,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:39,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:24:39,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280581460] [2020-07-21 13:24:39,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:39,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 13:24:39,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009540590] [2020-07-21 13:24:39,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:24:39,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:39,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:24:39,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:24:39,743 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-21 13:24:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:39,828 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 13:24:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:24:39,829 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-21 13:24:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:39,830 INFO L225 Difference]: With dead ends: 31 [2020-07-21 13:24:39,830 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 13:24:39,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 13:24:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 13:24:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 13:24:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 13:24:39,838 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-21 13:24:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:39,839 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 13:24:39,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:24:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 13:24:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 13:24:39,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:39,841 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:40,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:40,047 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:40,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-21 13:24:40,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:40,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207926942] [2020-07-21 13:24:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:24:40,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:40,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:24:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 13:24:40,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:40,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:40,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 13:24:41,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207926942] [2020-07-21 13:24:41,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:41,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 13:24:41,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447794230] [2020-07-21 13:24:41,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:24:41,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:41,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:24:41,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:24:41,127 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-21 13:24:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:41,242 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 13:24:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:24:41,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-21 13:24:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:41,251 INFO L225 Difference]: With dead ends: 34 [2020-07-21 13:24:41,251 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 13:24:41,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:24:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 13:24:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 13:24:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:24:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-21 13:24:41,259 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-21 13:24:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:41,259 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-21 13:24:41,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:24:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-21 13:24:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 13:24:41,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:41,261 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:41,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:41,466 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-21 13:24:41,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:41,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040262084] [2020-07-21 13:24:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:24:41,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:41,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:41,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:41,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 13:24:41,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:42,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 13:24:43,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040262084] [2020-07-21 13:24:43,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:43,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 13:24:43,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092628289] [2020-07-21 13:24:43,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:24:43,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:24:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:43,028 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-21 13:24:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:43,187 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-21 13:24:43,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:24:43,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-21 13:24:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:43,193 INFO L225 Difference]: With dead ends: 37 [2020-07-21 13:24:43,194 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 13:24:43,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 13:24:43,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 13:24:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 13:24:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-21 13:24:43,210 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-21 13:24:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:43,214 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-21 13:24:43,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:24:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-21 13:24:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 13:24:43,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:43,217 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:43,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:43,419 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-21 13:24:43,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:43,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944070557] [2020-07-21 13:24:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:24:43,475 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:43,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:24:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-21 13:24:43,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:44,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 13:24:45,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944070557] [2020-07-21 13:24:45,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:45,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 13:24:45,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719732069] [2020-07-21 13:24:45,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:24:45,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:45,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:24:45,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:24:45,592 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-21 13:24:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:45,777 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-21 13:24:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:24:45,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-21 13:24:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:45,780 INFO L225 Difference]: With dead ends: 40 [2020-07-21 13:24:45,780 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 13:24:45,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:24:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 13:24:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 13:24:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 13:24:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 13:24:45,788 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-21 13:24:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:45,789 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 13:24:45,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:24:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 13:24:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 13:24:45,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:45,790 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:46,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:46,003 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-21 13:24:46,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:46,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283535277] [2020-07-21 13:24:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:24:46,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:46,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:46,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:24:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 13:24:46,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:47,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:47,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:48,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:49,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:49,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 13:24:49,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283535277] [2020-07-21 13:24:49,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:49,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 13:24:49,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455251895] [2020-07-21 13:24:49,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:24:49,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:49,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:24:49,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:24:49,091 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-21 13:24:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:49,306 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-21 13:24:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:49,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-21 13:24:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:49,309 INFO L225 Difference]: With dead ends: 43 [2020-07-21 13:24:49,309 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 13:24:49,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:24:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 13:24:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 13:24:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 13:24:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 13:24:49,317 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-21 13:24:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:49,317 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 13:24:49,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:24:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 13:24:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 13:24:49,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:49,319 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:49,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:49,527 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:49,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-21 13:24:49,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:49,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824843563] [2020-07-21 13:24:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:49,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:49,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 13:24:49,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-21 13:24:49,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:51,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:52,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 13:24:53,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824843563] [2020-07-21 13:24:53,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:53,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 13:24:53,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754424531] [2020-07-21 13:24:53,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:24:53,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:24:53,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:53,892 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-21 13:24:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:54,084 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-21 13:24:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:24:54,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-21 13:24:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:54,087 INFO L225 Difference]: With dead ends: 46 [2020-07-21 13:24:54,087 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:24:54,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 13:24:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:24:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 13:24:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 13:24:54,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-21 13:24:54,098 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-21 13:24:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:54,098 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-21 13:24:54,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:24:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-21 13:24:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 13:24:54,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:54,100 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:54,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:54,304 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-21 13:24:54,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:54,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002131909] [2020-07-21 13:24:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:54,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:54,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 13:24:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-21 13:24:54,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:57,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:57,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:58,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:58,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:58,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:58,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:59,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:59,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:59,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:59,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:59,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-21 13:25:00,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002131909] [2020-07-21 13:25:00,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:00,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 13:25:00,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913345434] [2020-07-21 13:25:00,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 13:25:00,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 13:25:00,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:25:00,278 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 25 states. [2020-07-21 13:25:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:00,486 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-21 13:25:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:25:00,487 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-07-21 13:25:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:00,489 INFO L225 Difference]: With dead ends: 49 [2020-07-21 13:25:00,489 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 13:25:00,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 13:25:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 13:25:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-21 13:25:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:25:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-21 13:25:00,497 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-21 13:25:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:00,497 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-21 13:25:00,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 13:25:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-21 13:25:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 13:25:00,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:00,499 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:00,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:00,709 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:00,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-21 13:25:00,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:00,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838383251] [2020-07-21 13:25:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:00,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:00,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 13:25:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-21 13:25:01,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:04,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:06,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:06,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:07,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-21 13:25:08,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838383251] [2020-07-21 13:25:08,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:08,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 13:25:08,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900451056] [2020-07-21 13:25:08,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 13:25:08,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 13:25:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:25:08,971 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 27 states. [2020-07-21 13:25:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:09,251 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-21 13:25:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 13:25:09,252 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-07-21 13:25:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:09,254 INFO L225 Difference]: With dead ends: 52 [2020-07-21 13:25:09,254 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:25:09,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 98 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 13:25:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:25:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-21 13:25:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 13:25:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-21 13:25:09,276 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-21 13:25:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:09,277 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-21 13:25:09,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 13:25:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-21 13:25:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 13:25:09,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:09,279 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:09,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:09,492 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-21 13:25:09,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:09,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676471148] [2020-07-21 13:25:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:09,750 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:09,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 13:25:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-21 13:25:09,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:14,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:14,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:15,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:15,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:18,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:18,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:19,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:19,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:19,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:19,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 13:25:20,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676471148] [2020-07-21 13:25:20,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:20,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 13:25:20,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313619714] [2020-07-21 13:25:20,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 13:25:20,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:20,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 13:25:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:25:20,576 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 29 states. [2020-07-21 13:25:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:20,947 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-21 13:25:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:25:20,948 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-07-21 13:25:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:20,950 INFO L225 Difference]: With dead ends: 55 [2020-07-21 13:25:20,950 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 13:25:20,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 13:25:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 13:25:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-21 13:25:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 13:25:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-21 13:25:20,965 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-21 13:25:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:20,967 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-21 13:25:20,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 13:25:20,967 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-21 13:25:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 13:25:20,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:20,969 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:21,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:21,170 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:21,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-21 13:25:21,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:21,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311649719] [2020-07-21 13:25:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:21,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 13:25:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-21 13:25:21,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:27,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:29,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:31,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:31,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:32,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:33,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:34,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:34,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:35,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:36,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:36,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:36,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:36,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 13:25:36,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311649719] [2020-07-21 13:25:36,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:36,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 31 [2020-07-21 13:25:36,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108872122] [2020-07-21 13:25:36,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 13:25:36,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:36,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 13:25:36,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-07-21 13:25:36,229 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 31 states. [2020-07-21 13:25:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:36,635 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-21 13:25:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 13:25:36,636 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-07-21 13:25:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:36,638 INFO L225 Difference]: With dead ends: 58 [2020-07-21 13:25:36,638 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 13:25:36,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 114 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=619, Invalid=1273, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 13:25:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 13:25:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 13:25:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 13:25:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-21 13:25:36,645 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-21 13:25:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:36,646 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-21 13:25:36,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 13:25:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-21 13:25:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-21 13:25:36,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:36,647 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:36,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:36,850 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:36,851 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-21 13:25:36,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:36,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088223902] [2020-07-21 13:25:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:37,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 13:25:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-21 13:25:37,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:39,844 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:25:39,948 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:25:40,251 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 13:25:44,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:47,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:47,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:50,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:53,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:55,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:55,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:56,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:56,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-07-21 13:25:58,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088223902] [2020-07-21 13:25:58,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:58,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 33 [2020-07-21 13:25:58,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839350574] [2020-07-21 13:25:58,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 13:25:58,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 13:25:58,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 13:25:58,436 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 33 states. [2020-07-21 13:25:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:59,006 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-21 13:25:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 13:25:59,009 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2020-07-21 13:25:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:59,010 INFO L225 Difference]: With dead ends: 61 [2020-07-21 13:25:59,010 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 13:25:59,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 28 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2020-07-21 13:25:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 13:25:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 13:25:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 13:25:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-21 13:25:59,025 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-21 13:25:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:59,025 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-21 13:25:59,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 13:25:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-21 13:25:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-21 13:25:59,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:59,027 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:59,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:59,229 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:59,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:59,230 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-21 13:25:59,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:59,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071336852] [2020-07-21 13:25:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:59,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:59,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:59,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 13:25:59,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-21 13:26:00,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:02,630 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 13:26:02,732 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 13:26:02,840 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:26:02,951 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:26:03,448 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 13:26:03,551 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 13:26:03,662 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 13:26:03,778 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 13:26:03,908 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 13:26:04,034 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-21 13:26:04,153 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 13:26:04,272 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-21 13:26:04,376 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 13:26:08,038 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:26:08,145 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:26:08,259 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 13:26:08,379 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 13:26:08,499 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 13:26:08,618 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 13:26:08,734 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 13:26:08,841 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 13:26:08,943 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 13:26:09,048 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 13:26:09,577 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 13:26:10,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:10,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:12,606 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 13:26:12,708 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 13:26:12,817 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:26:12,928 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:26:13,039 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 13:26:14,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:14,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:16,634 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 13:26:16,738 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 13:26:17,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:17,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:20,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:20,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:22,811 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 13:26:23,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:23,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:25,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:27,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:28,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:29,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:29,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:30,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:30,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:30,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:30,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:31,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:31,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:31,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:31,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-21 13:26:31,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071336852] [2020-07-21 13:26:31,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:31,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 34 [2020-07-21 13:26:31,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183600502] [2020-07-21 13:26:31,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 13:26:31,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:31,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 13:26:31,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 13:26:31,555 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2020-07-21 13:26:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:32,441 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-21 13:26:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 13:26:32,444 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-07-21 13:26:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:32,445 INFO L225 Difference]: With dead ends: 64 [2020-07-21 13:26:32,446 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 13:26:32,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 130 SyntacticMatches, 31 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=800, Invalid=1552, Unknown=0, NotChecked=0, Total=2352 [2020-07-21 13:26:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 13:26:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 13:26:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 13:26:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-21 13:26:32,454 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-21 13:26:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:32,454 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-21 13:26:32,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 13:26:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-21 13:26:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-21 13:26:32,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:32,456 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:32,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:32,669 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-21 13:26:32,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:32,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122979845] [2020-07-21 13:26:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:33,388 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:33,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:33,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 13:26:33,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 13:26:35,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 13:26:39,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122979845] [2020-07-21 13:26:39,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:39,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-07-21 13:26:39,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985949815] [2020-07-21 13:26:39,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 13:26:39,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 13:26:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 13:26:39,789 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-07-21 13:26:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:40,977 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-21 13:26:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 13:26:40,981 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-07-21 13:26:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:40,983 INFO L225 Difference]: With dead ends: 67 [2020-07-21 13:26:40,983 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 13:26:40,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 13:26:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 13:26:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-21 13:26:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 13:26:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-21 13:26:40,990 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-21 13:26:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:40,990 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-21 13:26:40,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 13:26:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-21 13:26:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 13:26:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:40,992 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:41,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:41,205 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-21 13:26:41,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:41,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139934444] [2020-07-21 13:26:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:41,945 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:41,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-21 13:26:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-21 13:26:42,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:26:42,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139934444] [2020-07-21 13:26:42,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:26:42,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-07-21 13:26:42,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972187165] [2020-07-21 13:26:42,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:26:42,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:26:42,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:26:42,531 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-07-21 13:26:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:43,151 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-07-21 13:26:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 13:26:43,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-07-21 13:26:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:43,155 INFO L225 Difference]: With dead ends: 63 [2020-07-21 13:26:43,155 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:26:43,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 13:26:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:26:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:26:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:26:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:26:43,157 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-07-21 13:26:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:43,157 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:26:43,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:26:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:26:43,157 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:26:43,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:43,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:26:43,480 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 13:26:43,480 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:26:43,480 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:26:43,480 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 13:26:43,481 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:26:43,481 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:26:43,481 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-21 13:26:43,481 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-21 13:26:43,481 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-21 13:26:43,481 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-21 13:26:43,482 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-21 13:26:43,482 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 15 main_~input~0) (<= main_~input~0 15)) [2020-07-21 13:26:43,482 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-21 13:26:43,482 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-21 13:26:43,482 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-21 13:26:43,482 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-21 13:26:43,482 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-21 13:26:43,483 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2020-07-21 13:26:43,483 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 13:26:43,483 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-21 13:26:43,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:26:43 BoogieIcfgContainer [2020-07-21 13:26:43,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:26:43,492 INFO L168 Benchmark]: Toolchain (without parser) took 127440.83 ms. Allocated memory was 136.3 MB in the beginning and 664.3 MB in the end (delta: 528.0 MB). Free memory was 101.7 MB in the beginning and 340.8 MB in the end (delta: -239.1 MB). Peak memory consumption was 288.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:26:43,493 INFO L168 Benchmark]: CDTParser took 1.07 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 13:26:43,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.53 ms. Allocated memory is still 136.3 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:26:43,494 INFO L168 Benchmark]: Boogie Preprocessor took 34.37 ms. Allocated memory is still 136.3 MB. Free memory was 91.7 MB in the beginning and 90.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:26:43,494 INFO L168 Benchmark]: RCFGBuilder took 364.24 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 90.3 MB in the beginning and 169.7 MB in the end (delta: -79.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:26:43,495 INFO L168 Benchmark]: TraceAbstraction took 126725.75 ms. Allocated memory was 201.3 MB in the beginning and 664.3 MB in the end (delta: 462.9 MB). Free memory was 169.7 MB in the beginning and 340.8 MB in the end (delta: -171.1 MB). Peak memory consumption was 291.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:26:43,498 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.07 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.53 ms. Allocated memory is still 136.3 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.37 ms. Allocated memory is still 136.3 MB. Free memory was 91.7 MB in the beginning and 90.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.24 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 90.3 MB in the beginning and 169.7 MB in the end (delta: -79.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 126725.75 ms. Allocated memory was 201.3 MB in the beginning and 664.3 MB in the end (delta: 462.9 MB). Free memory was 169.7 MB in the beginning and 340.8 MB in the end (delta: -171.1 MB). Peak memory consumption was 291.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 126.5s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 1548 SDslu, 2904 SDs, 0 SdLazy, 1632 SolverSat, 655 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2072 GetRequests, 1362 SyntacticMatches, 239 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 112.9s InterpolantComputationTime, 1037 NumberOfCodeBlocks, 1037 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 1920 ConstructedInterpolants, 0 QuantifiedInterpolants, 399960 SizeOfPredicates, 153 NumberOfNonLiveVariables, 2431 ConjunctsInSsa, 373 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 3609/8464 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...