/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:56:22,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:56:22,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:56:22,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:56:22,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:56:22,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:56:22,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:56:22,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:56:22,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:56:22,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:56:22,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:56:22,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:56:22,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:56:22,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:56:22,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:56:22,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:56:22,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:56:22,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:56:22,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:56:22,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:56:22,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:56:22,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:56:22,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:56:22,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:56:22,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:56:22,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:56:22,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:56:22,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:56:22,597 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 01:56:22,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:56:22,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:56:22,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:56:22,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:56:22,638 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:56:22,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:56:22,639 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:56:22,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:56:22,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:56:22,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:56:22,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:56:22,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:56:22,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:56:22,642 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:56:22,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:56:22,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:56:22,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:56:22,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:56:22,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:56:22,643 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:56:22,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:56:22,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:56:22,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:56:22,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:56:22,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:56:22,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:56:22,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:22,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:56:22,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:56:22,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:56:23,093 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:56:23,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:56:23,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:56:23,128 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:56:23,130 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:56:23,131 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2020-07-21 01:56:23,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22651381e/af6dd3c439c04a0792091d58db39d6ba/FLAG7e3b2bf5c [2020-07-21 01:56:23,849 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:56:23,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2020-07-21 01:56:23,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22651381e/af6dd3c439c04a0792091d58db39d6ba/FLAG7e3b2bf5c [2020-07-21 01:56:24,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22651381e/af6dd3c439c04a0792091d58db39d6ba [2020-07-21 01:56:24,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:56:24,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:56:24,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:56:24,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:56:24,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:56:24,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bbde3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24, skipping insertion in model container [2020-07-21 01:56:24,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:56:24,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:56:24,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:56:24,492 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:56:24,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:56:24,532 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:56:24,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24 WrapperNode [2020-07-21 01:56:24,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:56:24,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:56:24,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:56:24,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:56:24,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (1/1) ... [2020-07-21 01:56:24,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:56:24,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:56:24,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:56:24,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:56:24,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (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 01:56:24,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:56:24,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:56:24,775 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:56:24,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:56:24,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:56:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:56:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:56:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:56:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:56:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:56:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:56:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:56:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:56:25,037 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:56:25,038 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:56:25,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:56:25 BoogieIcfgContainer [2020-07-21 01:56:25,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:56:25,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:56:25,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:56:25,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:56:25,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:56:24" (1/3) ... [2020-07-21 01:56:25,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2952ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:56:25, skipping insertion in model container [2020-07-21 01:56:25,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:24" (2/3) ... [2020-07-21 01:56:25,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2952ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:56:25, skipping insertion in model container [2020-07-21 01:56:25,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:56:25" (3/3) ... [2020-07-21 01:56:25,058 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.i [2020-07-21 01:56:25,075 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:56:25,088 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:56:25,156 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:56:25,213 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:56:25,213 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:56:25,213 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:56:25,213 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:56:25,214 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:56:25,214 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:56:25,214 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:56:25,215 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:56:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 01:56:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 01:56:25,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:25,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:25,254 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash -42161200, now seen corresponding path program 1 times [2020-07-21 01:56:25,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:25,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466851352] [2020-07-21 01:56:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:25,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:25,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:56:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:25,524 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:56:25,584 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 01:56:25,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:56:25,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466851352] [2020-07-21 01:56:25,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:56:25,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:56:25,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689830761] [2020-07-21 01:56:25,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:56:25,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:25,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:56:25,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:56:25,618 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2020-07-21 01:56:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:25,861 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-07-21 01:56:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:56:25,864 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-21 01:56:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:25,875 INFO L225 Difference]: With dead ends: 46 [2020-07-21 01:56:25,876 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 01:56:25,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:56:25,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 01:56:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 01:56:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 01:56:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 01:56:25,939 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 01:56:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:25,940 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 01:56:25,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:56:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 01:56:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:56:25,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:25,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:26,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:26,152 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash 219103455, now seen corresponding path program 1 times [2020-07-21 01:56:26,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:26,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380250040] [2020-07-21 01:56:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:26,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:56:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 01:56:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:26,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:26,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:26,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380250040] [2020-07-21 01:56:26,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:26,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 01:56:26,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574697078] [2020-07-21 01:56:26,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 01:56:26,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 01:56:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:56:26,472 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-07-21 01:56:26,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:26,781 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 01:56:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:56:26,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-07-21 01:56:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:26,783 INFO L225 Difference]: With dead ends: 25 [2020-07-21 01:56:26,783 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 01:56:26,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-07-21 01:56:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 01:56:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 01:56:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 01:56:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 01:56:26,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 01:56:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:26,794 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 01:56:26,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 01:56:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 01:56:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:56:26,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:26,796 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:27,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:27,011 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:27,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1744767088, now seen corresponding path program 2 times [2020-07-21 01:56:27,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:27,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448808654] [2020-07-21 01:56:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:27,056 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 01:56:27,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:27,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:27,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:27,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448808654] [2020-07-21 01:56:27,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:27,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 01:56:27,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841888231] [2020-07-21 01:56:27,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 01:56:27,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 01:56:27,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 01:56:27,510 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2020-07-21 01:56:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:28,291 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 01:56:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 01:56:28,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-07-21 01:56:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:28,294 INFO L225 Difference]: With dead ends: 31 [2020-07-21 01:56:28,294 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 01:56:28,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2020-07-21 01:56:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 01:56:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 01:56:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 01:56:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 01:56:28,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 01:56:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:28,329 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 01:56:28,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 01:56:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 01:56:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:56:28,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:28,333 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:28,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:28,547 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1040440016, now seen corresponding path program 3 times [2020-07-21 01:56:28,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:28,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790680584] [2020-07-21 01:56:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:28,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:28,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 01:56:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:28,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:28,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:29,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790680584] [2020-07-21 01:56:29,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:29,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-21 01:56:29,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206078938] [2020-07-21 01:56:29,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 01:56:29,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:29,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 01:56:29,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2020-07-21 01:56:29,533 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 29 states. [2020-07-21 01:56:30,178 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-21 01:56:30,442 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-07-21 01:56:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:31,437 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-07-21 01:56:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 01:56:31,438 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 22 [2020-07-21 01:56:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:31,439 INFO L225 Difference]: With dead ends: 43 [2020-07-21 01:56:31,440 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 01:56:31,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 01:56:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 01:56:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 01:56:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 01:56:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 01:56:31,451 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 01:56:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:31,452 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 01:56:31,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 01:56:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 01:56:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 01:56:31,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:31,454 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:31,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:31,670 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:31,671 INFO L82 PathProgramCache]: Analyzing trace with hash -276146064, now seen corresponding path program 4 times [2020-07-21 01:56:31,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:31,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010222765] [2020-07-21 01:56:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:31,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:31,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-21 01:56:31,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:32,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:32,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:34,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010222765] [2020-07-21 01:56:34,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:34,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-21 01:56:34,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938150431] [2020-07-21 01:56:34,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-21 01:56:34,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:34,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-21 01:56:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=2119, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 01:56:34,222 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 53 states. [2020-07-21 01:56:35,290 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 01:56:35,749 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-21 01:56:36,106 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 01:56:36,463 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-07-21 01:56:36,804 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 01:56:37,225 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 01:56:37,550 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 01:56:37,876 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 01:56:38,200 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 01:56:38,493 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 01:56:38,794 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 01:56:39,065 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 01:56:41,862 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 01:56:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:41,881 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-07-21 01:56:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-21 01:56:41,882 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 34 [2020-07-21 01:56:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:41,884 INFO L225 Difference]: With dead ends: 67 [2020-07-21 01:56:41,884 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 01:56:41,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1952, Invalid=4528, Unknown=0, NotChecked=0, Total=6480 [2020-07-21 01:56:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 01:56:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 01:56:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 01:56:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 01:56:41,911 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 01:56:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:41,911 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 01:56:41,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-21 01:56:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 01:56:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 01:56:41,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:41,914 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:42,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:42,129 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:42,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2111955216, now seen corresponding path program 5 times [2020-07-21 01:56:42,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:42,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358247591] [2020-07-21 01:56:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:42,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:42,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:42,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-21 01:56:42,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:44,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:45,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:51,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358247591] [2020-07-21 01:56:51,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:51,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-21 01:56:51,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413865021] [2020-07-21 01:56:51,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-21 01:56:51,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-21 01:56:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2413, Invalid=7687, Unknown=0, NotChecked=0, Total=10100 [2020-07-21 01:56:51,785 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 101 states. [2020-07-21 01:56:55,625 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 01:56:56,708 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-21 01:56:58,120 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 01:56:59,157 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 193 [2020-07-21 01:57:00,588 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 01:57:02,226 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-21 01:57:03,653 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-21 01:57:05,051 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-21 01:57:06,423 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-21 01:57:07,723 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-21 01:57:08,941 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 01:57:10,198 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 01:57:11,383 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 01:57:12,564 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 01:57:13,810 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-21 01:57:15,028 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 01:57:16,203 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 01:57:17,417 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 01:57:18,582 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 01:57:19,741 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 01:57:20,916 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 01:57:22,007 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 01:57:23,077 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 01:57:24,069 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 01:57:25,041 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 01:57:26,067 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 01:57:27,079 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 01:57:28,062 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 01:57:29,008 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 01:57:29,918 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 01:57:30,768 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 01:57:31,601 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 01:57:32,396 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 01:57:33,180 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 01:57:33,948 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 01:57:34,695 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 01:57:35,409 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 01:57:36,107 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 01:57:36,701 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 01:57:43,274 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 01:57:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:57:43,304 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2020-07-21 01:57:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 01:57:43,306 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 58 [2020-07-21 01:57:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:57:43,308 INFO L225 Difference]: With dead ends: 115 [2020-07-21 01:57:43,308 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 01:57:43,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 56.8s TimeCoverageRelationStatistics Valid=7328, Invalid=15928, Unknown=0, NotChecked=0, Total=23256 [2020-07-21 01:57:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 01:57:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 01:57:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 01:57:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 01:57:43,347 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 01:57:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:57:43,348 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 01:57:43,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-21 01:57:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 01:57:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 01:57:43,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:57:43,352 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:57:43,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:57:43,568 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:57:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:57:43,568 INFO L82 PathProgramCache]: Analyzing trace with hash -236770320, now seen corresponding path program 6 times [2020-07-21 01:57:43,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:57:43,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705542907] [2020-07-21 01:57:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:57:43,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:57:43,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:57:43,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-21 01:57:43,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:57:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:57:58,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:57:58,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:58:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:46,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705542907] [2020-07-21 01:58:46,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:58:46,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-21 01:58:46,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308287821] [2020-07-21 01:58:46,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-21 01:58:46,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-21 01:58:46,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9421, Invalid=29191, Unknown=0, NotChecked=0, Total=38612 [2020-07-21 01:58:46,167 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 197 states. [2020-07-21 01:59:26,995 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-21 01:59:32,678 WARN L193 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-21 01:59:52,351 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-21 01:59:58,382 WARN L193 SmtUtils]: Spent 5.19 s on a formula simplification. DAG size of input: 479 DAG size of output: 385 [2020-07-21 02:00:20,525 WARN L193 SmtUtils]: Spent 3.62 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-21 02:00:44,517 WARN L193 SmtUtils]: Spent 3.71 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-21 02:01:03,864 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-21 02:01:21,545 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-21 02:01:39,722 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-21 02:01:58,802 WARN L193 SmtUtils]: Spent 3.03 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-21 02:02:18,311 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-21 02:02:38,228 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-21 02:02:58,816 WARN L193 SmtUtils]: Spent 3.22 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-21 02:03:20,056 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-21 02:03:42,074 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-21 02:04:04,127 WARN L193 SmtUtils]: Spent 3.35 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-21 02:04:26,899 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-21 02:04:50,031 WARN L193 SmtUtils]: Spent 3.48 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-21 02:05:14,006 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-21 02:05:38,203 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-21 02:06:02,744 WARN L193 SmtUtils]: Spent 3.64 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-21 02:06:27,519 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-21 02:06:52,887 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-21 02:07:18,831 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-21 02:07:45,365 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-21 02:08:12,149 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-21 02:08:39,292 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-21 02:09:05,810 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-21 02:09:23,211 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-21 02:09:39,939 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 02:09:56,928 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-21 02:10:14,187 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-21 02:10:31,214 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-21 02:10:48,320 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification that was a NOOP. DAG size: 327