/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:12:56,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:12:56,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:12:56,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:12:56,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:12:56,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:12:56,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:12:56,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:12:56,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:12:56,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:12:56,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:12:56,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:12:56,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:12:56,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:12:56,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:12:56,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:12:56,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:12:56,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:12:56,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:12:56,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:12:56,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:12:56,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:12:56,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:12:56,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:12:56,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:12:56,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:12:56,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:12:56,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:12:56,724 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 12:12:56,739 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:12:56,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:12:56,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:12:56,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:12:56,741 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:12:56,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:12:56,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:12:56,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:12:56,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:12:56,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:12:56,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:12:56,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:12:56,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:12:56,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:12:56,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:12:56,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:12:56,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:12:56,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:12:56,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:12:56,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:12:56,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:12:56,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:12:56,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:12:56,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:12:56,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:12:56,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:12:56,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:56,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:12:56,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:12:56,746 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 -> NOT_INCREMENTALLY [2020-07-21 12:12:57,032 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:12:57,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:12:57,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:12:57,056 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:12:57,056 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:12:57,057 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-21 12:12:57,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ddce4f1/f0c5db93005d469a90372e7f7530d4f8/FLAG250245a02 [2020-07-21 12:12:57,617 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:12:57,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-21 12:12:57,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ddce4f1/f0c5db93005d469a90372e7f7530d4f8/FLAG250245a02 [2020-07-21 12:12:57,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58ddce4f1/f0c5db93005d469a90372e7f7530d4f8 [2020-07-21 12:12:58,007 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:12:58,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:12:58,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:12:58,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:12:58,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:12:58,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:12:57" (1/1) ... [2020-07-21 12:12:58,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1badc2bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58, skipping insertion in model container [2020-07-21 12:12:58,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:12:57" (1/1) ... [2020-07-21 12:12:58,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:12:58,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:12:58,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:12:58,213 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:12:58,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:12:58,244 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:12:58,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58 WrapperNode [2020-07-21 12:12:58,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:12:58,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:12:58,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:12:58,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:12:58,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (1/1) ... [2020-07-21 12:12:58,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (1/1) ... [2020-07-21 12:12:58,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (1/1) ... [2020-07-21 12:12:58,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (1/1) ... [2020-07-21 12:12:58,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (1/1) ... [2020-07-21 12:12:58,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (1/1) ... [2020-07-21 12:12:58,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (1/1) ... [2020-07-21 12:12:58,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:12:58,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:12:58,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:12:58,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:12:58,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (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 12:12:58,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:12:58,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:12:58,430 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:12:58,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:12:58,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:12:58,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:12:58,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:12:58,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:12:58,431 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:12:58,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:12:58,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:12:58,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:12:58,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:12:58,632 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:12:58,632 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 12:12:58,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:12:58 BoogieIcfgContainer [2020-07-21 12:12:58,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:12:58,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:12:58,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:12:58,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:12:58,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:12:57" (1/3) ... [2020-07-21 12:12:58,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59503071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:12:58, skipping insertion in model container [2020-07-21 12:12:58,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:58" (2/3) ... [2020-07-21 12:12:58,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59503071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:12:58, skipping insertion in model container [2020-07-21 12:12:58,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:12:58" (3/3) ... [2020-07-21 12:12:58,667 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2020-07-21 12:12:58,684 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:12:58,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:12:58,745 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:12:58,789 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:12:58,790 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:12:58,790 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:12:58,790 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:12:58,790 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:12:58,791 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:12:58,791 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:12:58,791 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:12:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 12:12:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 12:12:58,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:12:58,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:12:58,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:12:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:12:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-21 12:12:58,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:12:58,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704452626] [2020-07-21 12:12:58,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:12:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:12:58,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 12:12:58,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:12:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 12:12:58,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:12:58,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704452626] [2020-07-21 12:12:58,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:12:58,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 12:12:58,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326162889] [2020-07-21 12:12:58,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 12:12:58,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:12:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 12:12:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:12:58,955 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-21 12:12:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:12:58,984 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-21 12:12:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 12:12:58,985 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 12:12:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:12:58,994 INFO L225 Difference]: With dead ends: 50 [2020-07-21 12:12:58,995 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 12:12:58,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:12:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 12:12:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 12:12:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 12:12:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-21 12:12:59,038 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-21 12:12:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:12:59,039 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-21 12:12:59,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 12:12:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-21 12:12:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 12:12:59,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:12:59,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:12:59,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:59,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:12:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:12:59,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-21 12:12:59,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:12:59,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518113029] [2020-07-21 12:12:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:12:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:12:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:12:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:12:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:12:59,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:12:59,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518113029] [2020-07-21 12:12:59,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:12:59,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:12:59,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817071267] [2020-07-21 12:12:59,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:12:59,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:12:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:12:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:12:59,492 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2020-07-21 12:12:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:12:59,697 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-21 12:12:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:12:59,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-07-21 12:12:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:12:59,709 INFO L225 Difference]: With dead ends: 34 [2020-07-21 12:12:59,710 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 12:12:59,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:12:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 12:12:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-07-21 12:12:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 12:12:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-21 12:12:59,729 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-21 12:12:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:12:59,731 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-21 12:12:59,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:12:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-21 12:12:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 12:12:59,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:12:59,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:12:59,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:59,937 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:12:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:12:59,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-21 12:12:59,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:12:59,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517515048] [2020-07-21 12:12:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:12:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:12:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 12:12:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:13:00,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:00,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:00,224 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:13:00,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:00,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:13:00,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517515048] [2020-07-21 12:13:00,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:00,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 12:13:00,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050555889] [2020-07-21 12:13:00,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 12:13:00,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 12:13:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:13:00,303 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-07-21 12:13:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:02,533 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-21 12:13:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:13:02,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 12:13:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:02,538 INFO L225 Difference]: With dead ends: 37 [2020-07-21 12:13:02,538 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 12:13:02,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:13:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 12:13:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-07-21 12:13:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 12:13:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 12:13:02,558 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2020-07-21 12:13:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:02,559 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 12:13:02,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 12:13:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 12:13:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 12:13:02,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:02,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:02,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:02,777 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-21 12:13:02,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:02,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884447130] [2020-07-21 12:13:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:02,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:13:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:13:02,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:02,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:13:03,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884447130] [2020-07-21 12:13:03,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:03,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 12:13:03,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173060945] [2020-07-21 12:13:03,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:13:03,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:03,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:13:03,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:13:03,007 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-07-21 12:13:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:07,265 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-07-21 12:13:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:13:07,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-21 12:13:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:07,269 INFO L225 Difference]: With dead ends: 72 [2020-07-21 12:13:07,269 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 12:13:07,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:13:07,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 12:13:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-21 12:13:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 12:13:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-07-21 12:13:07,287 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 29 [2020-07-21 12:13:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:07,287 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-07-21 12:13:07,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:13:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-07-21 12:13:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 12:13:07,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:07,289 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:07,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:07,494 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash 802873865, now seen corresponding path program 1 times [2020-07-21 12:13:07,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:07,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347601989] [2020-07-21 12:13:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:07,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:13:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 12:13:07,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 12:13:07,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347601989] [2020-07-21 12:13:07,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:07,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 12:13:07,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952861874] [2020-07-21 12:13:07,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:13:07,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:13:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:13:07,630 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 6 states. [2020-07-21 12:13:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:07,743 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-21 12:13:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:13:07,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-07-21 12:13:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:07,747 INFO L225 Difference]: With dead ends: 86 [2020-07-21 12:13:07,747 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 12:13:07,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:13:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 12:13:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 12:13:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 12:13:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-07-21 12:13:07,764 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 45 [2020-07-21 12:13:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:07,765 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-07-21 12:13:07,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:13:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-07-21 12:13:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 12:13:07,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:07,767 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:07,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:07,980 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash -208243385, now seen corresponding path program 2 times [2020-07-21 12:13:07,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:07,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277987837] [2020-07-21 12:13:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:08,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 12:13:08,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 12:13:08,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:08,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 12:13:08,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277987837] [2020-07-21 12:13:08,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:08,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 12:13:08,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796123344] [2020-07-21 12:13:08,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 12:13:08,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:08,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 12:13:08,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:13:08,394 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 12 states. [2020-07-21 12:13:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:19,094 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2020-07-21 12:13:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:13:19,130 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-07-21 12:13:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:19,132 INFO L225 Difference]: With dead ends: 124 [2020-07-21 12:13:19,132 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 12:13:19,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:13:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 12:13:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2020-07-21 12:13:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-21 12:13:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2020-07-21 12:13:19,155 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 45 [2020-07-21 12:13:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:19,155 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2020-07-21 12:13:19,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 12:13:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2020-07-21 12:13:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 12:13:19,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:19,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:19,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:19,360 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash -53426768, now seen corresponding path program 2 times [2020-07-21 12:13:19,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:19,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614208961] [2020-07-21 12:13:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:19,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 12:13:19,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 12:13:19,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:19,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 12:13:20,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614208961] [2020-07-21 12:13:20,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:20,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 12:13:20,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456945392] [2020-07-21 12:13:20,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 12:13:20,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:20,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 12:13:20,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-07-21 12:13:20,161 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand 14 states. [2020-07-21 12:13:20,460 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-21 12:13:23,128 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 12:13:24,638 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-21 12:13:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:24,711 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2020-07-21 12:13:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:13:24,716 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-07-21 12:13:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:24,720 INFO L225 Difference]: With dead ends: 156 [2020-07-21 12:13:24,720 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 12:13:24,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-07-21 12:13:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 12:13:24,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-21 12:13:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 12:13:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2020-07-21 12:13:24,757 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 53 [2020-07-21 12:13:24,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:24,763 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2020-07-21 12:13:24,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 12:13:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2020-07-21 12:13:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 12:13:24,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:24,765 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:24,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:24,966 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:24,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:24,966 INFO L82 PathProgramCache]: Analyzing trace with hash 10333007, now seen corresponding path program 3 times [2020-07-21 12:13:24,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:24,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646974539] [2020-07-21 12:13:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:25,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:13:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 12:13:25,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 12:13:25,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646974539] [2020-07-21 12:13:25,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:25,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 12:13:25,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007485815] [2020-07-21 12:13:25,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 12:13:25,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:25,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 12:13:25,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:13:25,167 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand 10 states. [2020-07-21 12:13:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:25,304 INFO L93 Difference]: Finished difference Result 148 states and 180 transitions. [2020-07-21 12:13:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:13:25,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-07-21 12:13:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:25,318 INFO L225 Difference]: With dead ends: 148 [2020-07-21 12:13:25,318 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 12:13:25,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:13:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 12:13:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-07-21 12:13:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 12:13:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2020-07-21 12:13:25,340 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 61 [2020-07-21 12:13:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:25,341 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2020-07-21 12:13:25,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 12:13:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2020-07-21 12:13:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 12:13:25,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:25,344 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:25,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:25,551 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:25,552 INFO L82 PathProgramCache]: Analyzing trace with hash -185889457, now seen corresponding path program 4 times [2020-07-21 12:13:25,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:25,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765141619] [2020-07-21 12:13:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:13:25,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 12:13:25,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 12:13:25,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765141619] [2020-07-21 12:13:25,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:25,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 12:13:25,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399555348] [2020-07-21 12:13:25,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:13:25,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:13:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:13:25,728 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 9 states. [2020-07-21 12:13:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:25,960 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-07-21 12:13:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:13:25,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-07-21 12:13:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:25,966 INFO L225 Difference]: With dead ends: 134 [2020-07-21 12:13:25,966 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 12:13:25,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:13:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 12:13:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-07-21 12:13:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 12:13:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2020-07-21 12:13:25,998 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 61 [2020-07-21 12:13:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:25,998 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2020-07-21 12:13:25,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 12:13:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2020-07-21 12:13:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 12:13:26,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:26,000 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:26,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:26,216 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash -377856460, now seen corresponding path program 5 times [2020-07-21 12:13:26,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:26,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496590056] [2020-07-21 12:13:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 12:13:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-21 12:13:26,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:26,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-21 12:13:27,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496590056] [2020-07-21 12:13:27,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:27,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-21 12:13:27,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50607730] [2020-07-21 12:13:27,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 12:13:27,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 12:13:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-21 12:13:27,619 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand 18 states. [2020-07-21 12:13:28,476 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 12:13:29,256 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-21 12:13:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:31,626 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2020-07-21 12:13:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 12:13:31,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-07-21 12:13:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:31,628 INFO L225 Difference]: With dead ends: 140 [2020-07-21 12:13:31,628 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 12:13:31,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-07-21 12:13:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 12:13:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-21 12:13:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 12:13:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-07-21 12:13:31,640 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 69 [2020-07-21 12:13:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:31,640 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-07-21 12:13:31,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 12:13:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-07-21 12:13:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-21 12:13:31,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:31,642 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:31,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:31,857 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:31,858 INFO L82 PathProgramCache]: Analyzing trace with hash 728435349, now seen corresponding path program 6 times [2020-07-21 12:13:31,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:31,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311922780] [2020-07-21 12:13:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:31,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 12:13:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 12:13:32,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 12:13:32,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311922780] [2020-07-21 12:13:32,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:32,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-07-21 12:13:32,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018431036] [2020-07-21 12:13:32,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 12:13:32,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 12:13:32,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:13:32,135 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 13 states. [2020-07-21 12:13:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:32,358 INFO L93 Difference]: Finished difference Result 148 states and 180 transitions. [2020-07-21 12:13:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:13:32,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-07-21 12:13:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:32,363 INFO L225 Difference]: With dead ends: 148 [2020-07-21 12:13:32,363 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 12:13:32,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:13:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 12:13:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-07-21 12:13:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 12:13:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2020-07-21 12:13:32,377 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 77 [2020-07-21 12:13:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:32,378 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2020-07-21 12:13:32,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 12:13:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2020-07-21 12:13:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-21 12:13:32,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:32,379 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:32,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:32,593 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash -323556203, now seen corresponding path program 7 times [2020-07-21 12:13:32,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:32,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029478049] [2020-07-21 12:13:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:32,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 12:13:32,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 12:13:32,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-21 12:13:32,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029478049] [2020-07-21 12:13:32,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:32,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 12:13:32,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840648011] [2020-07-21 12:13:32,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 12:13:32,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 12:13:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:13:32,803 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand 12 states. [2020-07-21 12:13:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:33,154 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2020-07-21 12:13:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:13:33,156 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-07-21 12:13:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:33,158 INFO L225 Difference]: With dead ends: 138 [2020-07-21 12:13:33,158 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 12:13:33,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:13:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 12:13:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-07-21 12:13:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 12:13:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2020-07-21 12:13:33,176 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 77 [2020-07-21 12:13:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:33,176 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2020-07-21 12:13:33,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 12:13:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2020-07-21 12:13:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 12:13:33,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:33,179 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:33,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:33,394 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:33,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1534824776, now seen corresponding path program 8 times [2020-07-21 12:13:33,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:33,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697324495] [2020-07-21 12:13:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:13:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:33,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 12:13:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-21 12:13:34,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:34,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:13:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-07-21 12:13:36,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697324495] [2020-07-21 12:13:36,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:13:36,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 12:13:36,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308253232] [2020-07-21 12:13:36,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:13:36,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:13:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:13:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:13:36,238 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand 22 states. [2020-07-21 12:13:46,643 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 12:13:51,551 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-07-21 12:13:53,962 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-21 12:13:54,421 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-07-21 12:14:24,310 WARN L193 SmtUtils]: Spent 7.19 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 12:15:07,416 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:16:00,076 WARN L193 SmtUtils]: Spent 6.37 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:16:08,182 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:16:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:17,060 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2020-07-21 12:16:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 12:16:17,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2020-07-21 12:16:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:17,073 INFO L225 Difference]: With dead ends: 236 [2020-07-21 12:16:17,073 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 12:16:17,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 108.4s TimeCoverageRelationStatistics Valid=132, Invalid=1042, Unknown=16, NotChecked=0, Total=1190 [2020-07-21 12:16:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 12:16:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-07-21 12:16:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 12:16:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2020-07-21 12:16:17,102 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 85 [2020-07-21 12:16:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:17,102 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2020-07-21 12:16:17,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:16:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2020-07-21 12:16:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 12:16:17,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:17,104 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:16:17,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:17,318 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash -2106989411, now seen corresponding path program 9 times [2020-07-21 12:16:17,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:17,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874242750] [2020-07-21 12:16:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:16:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 12:16:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:17,991 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:16:18,374 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:16:18,918 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:16:19,545 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:16:20,275 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:16:20,878 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 12:16:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 12:16:21,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:16:22,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:16:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 12:16:34,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874242750] [2020-07-21 12:16:34,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:16:34,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-07-21 12:16:34,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679794919] [2020-07-21 12:16:34,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 12:16:34,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:34,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 12:16:34,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-07-21 12:16:34,342 INFO L87 Difference]: Start difference. First operand 200 states and 237 transitions. Second operand 24 states. [2020-07-21 12:16:39,419 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-21 12:16:41,525 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-07-21 12:16:42,889 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-21 12:16:48,175 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-21 12:16:50,443 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-21 12:16:52,460 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-21 12:16:56,651 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-21 12:16:59,508 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-07-21 12:17:02,101 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-07-21 12:17:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:02,448 INFO L93 Difference]: Finished difference Result 224 states and 258 transitions. [2020-07-21 12:17:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 12:17:02,460 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-07-21 12:17:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:02,461 INFO L225 Difference]: With dead ends: 224 [2020-07-21 12:17:02,462 INFO L226 Difference]: Without dead ends: 166 [2020-07-21 12:17:02,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 12:17:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-21 12:17:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 148. [2020-07-21 12:17:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-21 12:17:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2020-07-21 12:17:02,485 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 93 [2020-07-21 12:17:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:02,485 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2020-07-21 12:17:02,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 12:17:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2020-07-21 12:17:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 12:17:02,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:02,488 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:17:02,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:02,700 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash -178978853, now seen corresponding path program 10 times [2020-07-21 12:17:02,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:02,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349791787] [2020-07-21 12:17:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 12:17:02,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 76 proven. 104 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 12:17:02,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:17:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 76 proven. 104 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 12:17:02,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349791787] [2020-07-21 12:17:02,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:17:02,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2020-07-21 12:17:02,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443286591] [2020-07-21 12:17:02,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 12:17:02,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 12:17:02,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-07-21 12:17:02,997 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand 15 states. [2020-07-21 12:17:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:03,755 INFO L93 Difference]: Finished difference Result 198 states and 234 transitions. [2020-07-21 12:17:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 12:17:03,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2020-07-21 12:17:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:03,763 INFO L225 Difference]: With dead ends: 198 [2020-07-21 12:17:03,763 INFO L226 Difference]: Without dead ends: 172 [2020-07-21 12:17:03,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:17:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-21 12:17:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-07-21 12:17:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-21 12:17:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2020-07-21 12:17:03,779 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 93 [2020-07-21 12:17:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:03,780 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2020-07-21 12:17:03,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 12:17:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2020-07-21 12:17:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-21 12:17:03,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:03,781 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:17:03,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:03,987 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash -837428226, now seen corresponding path program 11 times [2020-07-21 12:17:03,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:03,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201551763] [2020-07-21 12:17:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:04,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-21 12:17:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:05,147 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:17:05,650 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:17:06,184 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:17:06,763 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:17:07,683 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 12:17:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-21 12:17:08,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:17:09,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:17:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-21 12:17:23,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201551763] [2020-07-21 12:17:23,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:17:23,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-07-21 12:17:23,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901624295] [2020-07-21 12:17:23,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 12:17:23,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 12:17:23,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-07-21 12:17:23,353 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand 26 states. [2020-07-21 12:17:54,344 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-21 12:17:56,120 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-07-21 12:17:57,442 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-07-21 12:18:18,812 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-07-21 12:18:30,883 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-21 12:19:09,387 WARN L193 SmtUtils]: Spent 6.84 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 12:19:30,281 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y1~0 c_main_~x2~0))) (and (= (+ c_main_~x1~0 3) (+ c_main_~x2~0 c_main_~y3~0 .cse0)) (= (+ (* 2 c_main_~y2~0) (* 3 c_main_~y1~0) c_main_~y3~0 (* c_main_~y2~0 c_main_~y1~0)) (+ c_main_~x1~0 2)) (= (+ c_main_~y2~0 c_main_~y3~0 .cse0) c_main_~x1~0))) is different from false [2020-07-21 12:19:40,215 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:19:45,844 WARN L193 SmtUtils]: Spent 972.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:19:58,529 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:20:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:30,722 INFO L93 Difference]: Finished difference Result 306 states and 364 transitions. [2020-07-21 12:20:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 12:20:30,736 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2020-07-21 12:20:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:30,738 INFO L225 Difference]: With dead ends: 306 [2020-07-21 12:20:30,738 INFO L226 Difference]: Without dead ends: 276 [2020-07-21 12:20:30,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 109.3s TimeCoverageRelationStatistics Valid=151, Invalid=1477, Unknown=16, NotChecked=78, Total=1722 [2020-07-21 12:20:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-07-21 12:20:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2020-07-21 12:20:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-07-21 12:20:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 327 transitions. [2020-07-21 12:20:30,765 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 327 transitions. Word has length 101 [2020-07-21 12:20:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:30,765 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 327 transitions. [2020-07-21 12:20:30,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 12:20:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 327 transitions. [2020-07-21 12:20:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 12:20:30,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:30,767 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:20:30,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:30,977 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:30,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1126316255, now seen corresponding path program 12 times [2020-07-21 12:20:30,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:30,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226847314] [2020-07-21 12:20:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:20:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 12:20:31,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 104 proven. 160 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-07-21 12:20:31,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:20:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 104 proven. 160 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-07-21 12:20:31,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226847314] [2020-07-21 12:20:31,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:20:31,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2020-07-21 12:20:31,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012527198] [2020-07-21 12:20:31,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 12:20:31,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:31,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 12:20:31,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-07-21 12:20:31,418 INFO L87 Difference]: Start difference. First operand 276 states and 327 transitions. Second operand 18 states. [2020-07-21 12:20:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:34,121 INFO L93 Difference]: Finished difference Result 338 states and 405 transitions. [2020-07-21 12:20:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 12:20:34,136 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-07-21 12:20:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:34,138 INFO L225 Difference]: With dead ends: 338 [2020-07-21 12:20:34,138 INFO L226 Difference]: Without dead ends: 308 [2020-07-21 12:20:34,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 195 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2020-07-21 12:20:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-07-21 12:20:34,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2020-07-21 12:20:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-21 12:20:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 370 transitions. [2020-07-21 12:20:34,174 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 370 transitions. Word has length 109 [2020-07-21 12:20:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:34,175 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 370 transitions. [2020-07-21 12:20:34,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 12:20:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 370 transitions. [2020-07-21 12:20:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 12:20:34,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:34,177 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:20:34,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:34,378 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:34,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:34,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1251867972, now seen corresponding path program 13 times [2020-07-21 12:20:34,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:34,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734991079] [2020-07-21 12:20:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 12:20:34,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:36,249 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:20:36,942 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:20:37,696 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:20:38,515 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:20:39,412 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:20:40,767 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 12:20:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-21 12:20:42,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:20:43,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:21:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-07-21 12:21:17,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734991079] [2020-07-21 12:21:17,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:21:17,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-07-21 12:21:17,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379742137] [2020-07-21 12:21:17,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 12:21:17,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:17,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 12:21:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-07-21 12:21:17,205 INFO L87 Difference]: Start difference. First operand 308 states and 370 transitions. Second operand 30 states. [2020-07-21 12:21:59,107 WARN L193 SmtUtils]: Spent 3.31 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 12:22:41,570 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 12:23:10,850 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:23:22,899 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 12:23:43,782 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 12:24:13,870 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 12:24:16,060 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-21 12:24:19,936 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-07-21 12:24:22,699 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-07-21 12:24:51,234 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-07-21 12:24:57,080 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2020-07-21 12:25:00,734 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-21 12:25:04,041 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y1~0 c_main_~x2~0))) (and (= (+ c_main_~x1~0 1) (+ (* 2 c_main_~y2~0) (* 5 c_main_~y1~0) c_main_~y3~0 (* c_main_~y2~0 c_main_~y1~0))) (= (+ c_main_~x1~0 5) (+ c_main_~x2~0 c_main_~y3~0 .cse0)) (= (+ c_main_~y2~0 c_main_~y3~0 .cse0) c_main_~x1~0))) is different from false [2020-07-21 12:25:18,555 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 12:25:37,334 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:26:02,513 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 12:26:32,032 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:26:47,532 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 12:27:01,215 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13