/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/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:57:55,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:57:55,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:57:55,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:57:55,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:57:55,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:57:55,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:57:55,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:57:55,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:57:55,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:57:55,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:57:55,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:57:55,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:57:55,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:57:55,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:57:55,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:57:55,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:57:55,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:57:55,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:57:55,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:57:55,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:57:55,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:57:55,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:57:55,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:57:55,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:57:55,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:57:55,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:57:55,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:57:55,851 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 10:57:55,867 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:57:55,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:57:55,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:57:55,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:57:55,872 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:57:55,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:57:55,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:57:55,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:57:55,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:57:55,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:57:55,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:57:55,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:57:55,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:57:55,874 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:57:55,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:57:55,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:57:55,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:57:55,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:57:55,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:57:55,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:57:55,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:57:55,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:57:55,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:57:55,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:57:55,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:57:55,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:57:55,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:55,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:57:55,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:57:55,879 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 10:57:56,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:57:56,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:57:56,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:57:56,198 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:57:56,199 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:57:56,200 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-21 10:57:56,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20ccc0287/538b61b9460b4db6a30e05a92c3638f3/FLAGc2f2ead94 [2020-07-21 10:57:56,786 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:57:56,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-21 10:57:56,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20ccc0287/538b61b9460b4db6a30e05a92c3638f3/FLAGc2f2ead94 [2020-07-21 10:57:57,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20ccc0287/538b61b9460b4db6a30e05a92c3638f3 [2020-07-21 10:57:57,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:57:57,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:57:57,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:57:57,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:57:57,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:57:57,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f29f361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57, skipping insertion in model container [2020-07-21 10:57:57,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:57:57,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:57:57,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:57:57,358 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:57:57,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:57:57,393 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:57:57,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57 WrapperNode [2020-07-21 10:57:57,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:57:57,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:57:57,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:57:57,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:57:57,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (1/1) ... [2020-07-21 10:57:57,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:57:57,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:57:57,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:57:57,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:57:57,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (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 10:57:57,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:57:57,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:57:57,580 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 10:57:57,581 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 10:57:57,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:57:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:57:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:57:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 10:57:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 10:57:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:57:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:57:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:57:57,789 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:57:57,789 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:57:57,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:57:57 BoogieIcfgContainer [2020-07-21 10:57:57,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:57:57,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:57:57,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:57:57,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:57:57,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:57:57" (1/3) ... [2020-07-21 10:57:57,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658c9585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:57:57, skipping insertion in model container [2020-07-21 10:57:57,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:57" (2/3) ... [2020-07-21 10:57:57,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658c9585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:57:57, skipping insertion in model container [2020-07-21 10:57:57,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:57:57" (3/3) ... [2020-07-21 10:57:57,804 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-07-21 10:57:57,815 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:57:57,838 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:57:57,877 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:57:57,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:57:57,934 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:57:57,934 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:57:57,934 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:57:57,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:57:57,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:57:57,935 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:57:57,935 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:57:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 10:57:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:57:57,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:57,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:57,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 10:57:57,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:57,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013320676] [2020-07-21 10:57:57,976 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 10:57:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:58,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:57:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:57:58,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:57:58,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013320676] [2020-07-21 10:57:58,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:57:58,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:57:58,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196065844] [2020-07-21 10:57:58,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:57:58,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:58,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:57:58,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:57:58,168 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 10:57:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:58,290 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 10:57:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:57:58,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:57:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:58,303 INFO L225 Difference]: With dead ends: 44 [2020-07-21 10:57:58,312 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:57:58,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:57:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:57:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 10:57:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:57:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:57:58,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 10:57:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:58,402 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:57:58,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:57:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:57:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:57:58,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:58,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:58,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:58,624 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 10:57:58,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:58,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623167359] [2020-07-21 10:57:58,627 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 10:57:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:58,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:57:58,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:57:58,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:57:58,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623167359] [2020-07-21 10:57:58,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:57:58,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:57:58,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631787074] [2020-07-21 10:57:58,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:57:58,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:58,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:57:58,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:57:58,692 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 10:57:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:58,784 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 10:57:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:57:58,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:57:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:58,787 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:57:58,788 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 10:57:58,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:57:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 10:57:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 10:57:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:57:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:57:58,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 10:57:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:58,799 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:57:58,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:57:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:57:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:57:58,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:58,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:59,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:59,014 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 10:57:59,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:59,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520831173] [2020-07-21 10:57:59,017 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 10:57:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:59,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:59,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:59,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:59,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520831173] [2020-07-21 10:57:59,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:59,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:57:59,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030038177] [2020-07-21 10:57:59,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:57:59,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:57:59,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:57:59,471 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 10:57:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:59,588 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 10:57:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:57:59,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 10:57:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:59,590 INFO L225 Difference]: With dead ends: 41 [2020-07-21 10:57:59,591 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 10:57:59,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 10:57:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 10:57:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:57:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:57:59,602 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 10:57:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:59,602 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:57:59,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:57:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:57:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:57:59,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:59,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:59,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:59,818 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:59,819 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 10:57:59,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:59,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511752161] [2020-07-21 10:57:59,821 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 10:57:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:59,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:59,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:00,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:00,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:58:00,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511752161] [2020-07-21 10:58:00,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:00,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:58:00,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854274908] [2020-07-21 10:58:00,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:58:00,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:00,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:58:00,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:58:00,071 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 10:58:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:00,199 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 10:58:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:58:00,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 10:58:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:00,202 INFO L225 Difference]: With dead ends: 46 [2020-07-21 10:58:00,202 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 10:58:00,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:58:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 10:58:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 10:58:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:58:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:58:00,213 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 10:58:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:00,213 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:58:00,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:58:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:58:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:58:00,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:00,216 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:00,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:00,431 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 10:58:00,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:00,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517337568] [2020-07-21 10:58:00,432 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 10:58:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:00,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:58:00,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:58:00,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:00,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:00,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:00,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:58:00,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517337568] [2020-07-21 10:58:00,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:00,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:58:00,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790706404] [2020-07-21 10:58:00,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:58:00,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:00,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:58:00,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:58:00,930 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 10:58:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:01,133 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 10:58:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:58:01,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 10:58:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:01,136 INFO L225 Difference]: With dead ends: 51 [2020-07-21 10:58:01,136 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 10:58:01,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 10:58:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 10:58:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:58:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:58:01,147 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 10:58:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:01,147 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:58:01,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:58:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:58:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 10:58:01,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:01,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:01,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:01,353 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:01,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 10:58:01,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:01,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244932371] [2020-07-21 10:58:01,356 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 10:58:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:01,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:58:01,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 10:58:01,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:01,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:58:01,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244932371] [2020-07-21 10:58:01,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:01,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:58:01,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817831251] [2020-07-21 10:58:01,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:58:01,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:58:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:58:01,788 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 10:58:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:01,966 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 10:58:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:58:01,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 10:58:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:01,973 INFO L225 Difference]: With dead ends: 56 [2020-07-21 10:58:01,973 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:58:01,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:58:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 10:58:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:58:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:58:01,993 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 10:58:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:01,994 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:58:01,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:58:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:58:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:58:02,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:02,000 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 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 10:58:02,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:02,214 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 10:58:02,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:02,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547658916] [2020-07-21 10:58:02,216 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 10:58:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:02,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:02,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:58:02,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:02,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:58:02,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547658916] [2020-07-21 10:58:02,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:02,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:58:02,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032283195] [2020-07-21 10:58:02,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:58:02,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:02,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:58:02,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:02,926 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 10:58:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:03,148 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 10:58:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:03,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 10:58:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:03,151 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:58:03,151 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:58:03,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:58:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:58:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 10:58:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:58:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:58:03,162 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 10:58:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:03,163 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:58:03,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:58:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:58:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:58:03,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:03,170 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 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 10:58:03,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:03,378 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 10:58:03,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:03,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233908092] [2020-07-21 10:58:03,381 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 10:58:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 10:58:03,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:03,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:03,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:03,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:03,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:03,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:58:04,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233908092] [2020-07-21 10:58:04,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:04,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:58:04,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785547608] [2020-07-21 10:58:04,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:58:04,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:04,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:58:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:04,028 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 10:58:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:04,244 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 10:58:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:04,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 10:58:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:04,248 INFO L225 Difference]: With dead ends: 66 [2020-07-21 10:58:04,248 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:58:04,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:58:04,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:58:04,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 10:58:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:58:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:58:04,261 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 10:58:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:04,262 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:58:04,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:58:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:58:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 10:58:04,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:04,265 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:04,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:04,477 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:04,478 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 10:58:04,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:04,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637752382] [2020-07-21 10:58:04,481 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 10:58:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:04,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:04,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 10:58:04,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:05,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 10:58:05,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637752382] [2020-07-21 10:58:05,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:05,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 10:58:05,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972109578] [2020-07-21 10:58:05,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:58:05,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:05,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:58:05,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:58:05,523 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 10:58:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:05,770 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 10:58:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:05,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 10:58:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:05,773 INFO L225 Difference]: With dead ends: 71 [2020-07-21 10:58:05,774 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 10:58:05,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:58:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 10:58:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 10:58:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:58:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:58:05,787 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 10:58:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:05,787 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:58:05,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:58:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:58:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 10:58:05,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:05,790 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:06,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:06,004 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 10:58:06,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:06,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666773973] [2020-07-21 10:58:06,007 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 10:58:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:06,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 10:58:06,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:06,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:07,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:07,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 10:58:07,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666773973] [2020-07-21 10:58:07,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:07,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:07,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559590286] [2020-07-21 10:58:07,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:07,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:07,112 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 15 states. [2020-07-21 10:58:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:07,352 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 10:58:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:07,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 108 [2020-07-21 10:58:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:07,355 INFO L225 Difference]: With dead ends: 76 [2020-07-21 10:58:07,357 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 10:58:07,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 10:58:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 10:58:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:58:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:58:07,385 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 10:58:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:07,386 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:58:07,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:58:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 10:58:07,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:07,393 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:07,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:07,595 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 10:58:07,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:07,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447485047] [2020-07-21 10:58:07,597 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 10:58:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:58:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 10:58:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:08,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 10:58:09,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447485047] [2020-07-21 10:58:09,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:09,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:58:09,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086302834] [2020-07-21 10:58:09,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:09,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:09,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:09,498 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 17 states. [2020-07-21 10:58:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:09,783 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 10:58:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:09,783 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 208 [2020-07-21 10:58:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:09,786 INFO L225 Difference]: With dead ends: 81 [2020-07-21 10:58:09,786 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 10:58:09,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:58:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 10:58:09,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 10:58:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:58:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 10:58:09,799 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 10:58:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:09,800 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 10:58:09,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 10:58:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-21 10:58:09,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:09,802 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:10,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:10,017 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1298373331, now seen corresponding path program 2 times [2020-07-21 10:58:10,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:10,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482301277] [2020-07-21 10:58:10,018 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 10:58:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:10,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:10,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 156 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 10:58:10,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:10,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 164 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-07-21 10:58:11,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482301277] [2020-07-21 10:58:11,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:11,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:11,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257156903] [2020-07-21 10:58:11,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:11,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:11,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:11,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:11,225 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 15 states. [2020-07-21 10:58:11,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:11,451 INFO L93 Difference]: Finished difference Result 99 states and 221 transitions. [2020-07-21 10:58:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:11,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-21 10:58:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:11,456 INFO L225 Difference]: With dead ends: 99 [2020-07-21 10:58:11,456 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 10:58:11,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 272 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 10:58:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2020-07-21 10:58:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 10:58:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 92 transitions. [2020-07-21 10:58:11,470 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 92 transitions. Word has length 148 [2020-07-21 10:58:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:11,471 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 92 transitions. [2020-07-21 10:58:11,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 92 transitions. [2020-07-21 10:58:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-21 10:58:11,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:11,473 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:11,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:11,685 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:11,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times [2020-07-21 10:58:11,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:11,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788347633] [2020-07-21 10:58:11,687 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 10:58:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:11,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-07-21 10:58:11,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:12,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:12,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:12,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:12,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 94 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-21 10:58:12,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788347633] [2020-07-21 10:58:12,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:12,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:12,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222767503] [2020-07-21 10:58:12,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:12,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:12,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:12,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:12,465 INFO L87 Difference]: Start difference. First operand 57 states and 92 transitions. Second operand 13 states. [2020-07-21 10:58:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:12,676 INFO L93 Difference]: Finished difference Result 99 states and 217 transitions. [2020-07-21 10:58:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:12,677 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-07-21 10:58:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:12,679 INFO L225 Difference]: With dead ends: 99 [2020-07-21 10:58:12,680 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 10:58:12,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 226 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 10:58:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2020-07-21 10:58:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 10:58:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 98 transitions. [2020-07-21 10:58:12,699 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 98 transitions. Word has length 123 [2020-07-21 10:58:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:12,700 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 98 transitions. [2020-07-21 10:58:12,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 98 transitions. [2020-07-21 10:58:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-21 10:58:12,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:12,703 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:12,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:12,917 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1017418174, now seen corresponding path program 1 times [2020-07-21 10:58:12,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:12,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025814501] [2020-07-21 10:58:12,919 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 10:58:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:58:13,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 114 proven. 292 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-07-21 10:58:13,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:14,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 116 proven. 304 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2020-07-21 10:58:14,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025814501] [2020-07-21 10:58:14,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:14,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:58:14,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300630996] [2020-07-21 10:58:14,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:14,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:14,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:14,827 INFO L87 Difference]: Start difference. First operand 59 states and 98 transitions. Second operand 17 states. [2020-07-21 10:58:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:15,207 INFO L93 Difference]: Finished difference Result 113 states and 271 transitions. [2020-07-21 10:58:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:15,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 216 [2020-07-21 10:58:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:15,210 INFO L225 Difference]: With dead ends: 113 [2020-07-21 10:58:15,210 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 10:58:15,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 403 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:58:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 10:58:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-21 10:58:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 10:58:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 104 transitions. [2020-07-21 10:58:15,224 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 104 transitions. Word has length 216 [2020-07-21 10:58:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:15,224 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 104 transitions. [2020-07-21 10:58:15,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 104 transitions. [2020-07-21 10:58:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 10:58:15,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:15,228 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:15,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:15,443 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1521837768, now seen corresponding path program 2 times [2020-07-21 10:58:15,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:15,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683869852] [2020-07-21 10:58:15,445 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 10:58:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:15,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 114 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-07-21 10:58:15,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:16,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:16,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:16,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:16,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:16,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:16,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:16,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:16,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 122 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-21 10:58:16,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683869852] [2020-07-21 10:58:16,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:16,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:16,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086550170] [2020-07-21 10:58:16,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:16,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:16,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:16,616 INFO L87 Difference]: Start difference. First operand 67 states and 104 transitions. Second operand 15 states. [2020-07-21 10:58:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:16,864 INFO L93 Difference]: Finished difference Result 107 states and 201 transitions. [2020-07-21 10:58:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:16,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 10:58:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:16,869 INFO L225 Difference]: With dead ends: 107 [2020-07-21 10:58:16,869 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 10:58:16,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 10:58:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 70. [2020-07-21 10:58:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 10:58:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 112 transitions. [2020-07-21 10:58:16,899 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 112 transitions. Word has length 135 [2020-07-21 10:58:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:16,900 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 112 transitions. [2020-07-21 10:58:16,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 112 transitions. [2020-07-21 10:58:16,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-21 10:58:16,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:16,903 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:17,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:17,104 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1102424554, now seen corresponding path program 3 times [2020-07-21 10:58:17,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:17,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881542686] [2020-07-21 10:58:17,106 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 10:58:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:58:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 116 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-07-21 10:58:17,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:18,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 130 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 10:58:18,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881542686] [2020-07-21 10:58:18,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:18,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:58:18,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330766000] [2020-07-21 10:58:18,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:18,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:18,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:18,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:18,809 INFO L87 Difference]: Start difference. First operand 70 states and 112 transitions. Second operand 17 states. [2020-07-21 10:58:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:19,159 INFO L93 Difference]: Finished difference Result 107 states and 197 transitions. [2020-07-21 10:58:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:19,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2020-07-21 10:58:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:19,162 INFO L225 Difference]: With dead ends: 107 [2020-07-21 10:58:19,163 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 10:58:19,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 297 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:58:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 10:58:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-21 10:58:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 10:58:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2020-07-21 10:58:19,173 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 163 [2020-07-21 10:58:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:19,174 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2020-07-21 10:58:19,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2020-07-21 10:58:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-21 10:58:19,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:19,176 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:19,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:19,391 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 4 times [2020-07-21 10:58:19,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:19,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604880369] [2020-07-21 10:58:19,393 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 10:58:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-07-21 10:58:19,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:20,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-07-21 10:58:20,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604880369] [2020-07-21 10:58:20,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:20,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:20,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169914908] [2020-07-21 10:58:20,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:20,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:20,269 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 13 states. [2020-07-21 10:58:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:20,459 INFO L93 Difference]: Finished difference Result 107 states and 179 transitions. [2020-07-21 10:58:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:20,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-07-21 10:58:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:20,465 INFO L225 Difference]: With dead ends: 107 [2020-07-21 10:58:20,465 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 10:58:20,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 10:58:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-07-21 10:58:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 10:58:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 136 transitions. [2020-07-21 10:58:20,486 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 136 transitions. Word has length 136 [2020-07-21 10:58:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:20,487 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 136 transitions. [2020-07-21 10:58:20,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 136 transitions. [2020-07-21 10:58:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-21 10:58:20,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:20,491 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:20,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:20,706 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:20,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:20,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1316077641, now seen corresponding path program 5 times [2020-07-21 10:58:20,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:20,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959985401] [2020-07-21 10:58:20,708 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 10:58:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:20,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:20,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 106 proven. 98 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-07-21 10:58:20,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:21,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:22,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:22,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:22,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 108 proven. 104 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-07-21 10:58:22,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959985401] [2020-07-21 10:58:22,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:22,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:22,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945833785] [2020-07-21 10:58:22,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:22,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:22,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:22,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:22,276 INFO L87 Difference]: Start difference. First operand 82 states and 136 transitions. Second operand 15 states. [2020-07-21 10:58:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:22,514 INFO L93 Difference]: Finished difference Result 117 states and 203 transitions. [2020-07-21 10:58:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:22,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-21 10:58:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:22,517 INFO L225 Difference]: With dead ends: 117 [2020-07-21 10:58:22,517 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 10:58:22,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 271 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:22,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 10:58:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-21 10:58:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 10:58:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-21 10:58:22,533 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 148 [2020-07-21 10:58:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:22,534 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-21 10:58:22,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-21 10:58:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-21 10:58:22,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:22,536 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:22,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:22,751 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:22,751 INFO L82 PathProgramCache]: Analyzing trace with hash -872965087, now seen corresponding path program 6 times [2020-07-21 10:58:22,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:22,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468366015] [2020-07-21 10:58:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:22,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 81 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 10:58:22,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:23,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 85 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 10:58:23,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468366015] [2020-07-21 10:58:23,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:23,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:23,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284336072] [2020-07-21 10:58:23,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:23,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:23,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:23,686 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-21 10:58:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:23,871 INFO L93 Difference]: Finished difference Result 114 states and 190 transitions. [2020-07-21 10:58:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:23,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 149 [2020-07-21 10:58:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:23,877 INFO L225 Difference]: With dead ends: 114 [2020-07-21 10:58:23,877 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 10:58:23,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 10:58:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-07-21 10:58:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 10:58:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-21 10:58:23,887 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 149 [2020-07-21 10:58:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:23,888 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-21 10:58:23,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-21 10:58:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-21 10:58:23,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:23,890 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:24,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:24,105 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:24,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 7 times [2020-07-21 10:58:24,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:24,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317077158] [2020-07-21 10:58:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:24,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:24,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-07-21 10:58:24,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:24,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 143 proven. 37 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 10:58:25,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317077158] [2020-07-21 10:58:25,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:25,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:25,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120448525] [2020-07-21 10:58:25,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:25,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:25,127 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-21 10:58:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:25,299 INFO L93 Difference]: Finished difference Result 106 states and 183 transitions. [2020-07-21 10:58:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:25,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 150 [2020-07-21 10:58:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:25,302 INFO L225 Difference]: With dead ends: 106 [2020-07-21 10:58:25,302 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 10:58:25,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 10:58:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-07-21 10:58:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-21 10:58:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 161 transitions. [2020-07-21 10:58:25,312 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 161 transitions. Word has length 150 [2020-07-21 10:58:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:25,312 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 161 transitions. [2020-07-21 10:58:25,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 161 transitions. [2020-07-21 10:58:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-21 10:58:25,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:25,315 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 9, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:25,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:25,516 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:25,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:25,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1102006884, now seen corresponding path program 8 times [2020-07-21 10:58:25,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:25,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276556481] [2020-07-21 10:58:25,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:25,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:25,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 185 proven. 49 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-21 10:58:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:26,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 187 proven. 55 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2020-07-21 10:58:26,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276556481] [2020-07-21 10:58:26,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:26,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:26,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145448694] [2020-07-21 10:58:26,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:26,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:26,849 INFO L87 Difference]: Start difference. First operand 92 states and 161 transitions. Second operand 15 states. [2020-07-21 10:58:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:27,075 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-21 10:58:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:27,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 162 [2020-07-21 10:58:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:27,078 INFO L225 Difference]: With dead ends: 117 [2020-07-21 10:58:27,078 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 10:58:27,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 299 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 10:58:27,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-07-21 10:58:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 10:58:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 158 transitions. [2020-07-21 10:58:27,090 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 158 transitions. Word has length 162 [2020-07-21 10:58:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:27,090 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 158 transitions. [2020-07-21 10:58:27,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 158 transitions. [2020-07-21 10:58:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-21 10:58:27,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:27,093 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:27,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:27,306 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1920867700, now seen corresponding path program 9 times [2020-07-21 10:58:27,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:27,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856007958] [2020-07-21 10:58:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:27,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 37 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-07-21 10:58:27,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:27,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:27,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-21 10:58:28,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856007958] [2020-07-21 10:58:28,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:28,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:28,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345057776] [2020-07-21 10:58:28,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:28,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:28,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:28,305 INFO L87 Difference]: Start difference. First operand 96 states and 158 transitions. Second operand 13 states. [2020-07-21 10:58:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:28,486 INFO L93 Difference]: Finished difference Result 129 states and 217 transitions. [2020-07-21 10:58:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:28,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 163 [2020-07-21 10:58:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:28,492 INFO L225 Difference]: With dead ends: 129 [2020-07-21 10:58:28,492 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 10:58:28,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 305 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 10:58:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-07-21 10:58:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 10:58:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-21 10:58:28,503 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 163 [2020-07-21 10:58:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:28,503 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-21 10:58:28,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-21 10:58:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-21 10:58:28,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:28,506 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:28,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:28,721 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1607241826, now seen corresponding path program 10 times [2020-07-21 10:58:28,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:28,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937337887] [2020-07-21 10:58:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:58:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 32 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-21 10:58:28,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:29,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 34 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-07-21 10:58:29,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937337887] [2020-07-21 10:58:29,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:29,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:58:29,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366712661] [2020-07-21 10:58:29,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:58:29,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:29,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:58:29,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:58:29,495 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 11 states. [2020-07-21 10:58:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:29,629 INFO L93 Difference]: Finished difference Result 131 states and 225 transitions. [2020-07-21 10:58:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:58:29,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 164 [2020-07-21 10:58:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:29,633 INFO L225 Difference]: With dead ends: 131 [2020-07-21 10:58:29,634 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 10:58:29,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 10:58:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-07-21 10:58:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 10:58:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 157 transitions. [2020-07-21 10:58:29,645 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 157 transitions. Word has length 164 [2020-07-21 10:58:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:29,645 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 157 transitions. [2020-07-21 10:58:29,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:58:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 157 transitions. [2020-07-21 10:58:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-21 10:58:29,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:29,648 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:29,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:29,863 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash -315995755, now seen corresponding path program 11 times [2020-07-21 10:58:29,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:29,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101741342] [2020-07-21 10:58:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:30,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 168 proven. 41 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2020-07-21 10:58:30,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:30,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 170 proven. 43 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-21 10:58:30,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101741342] [2020-07-21 10:58:30,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:30,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:30,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108029483] [2020-07-21 10:58:30,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:30,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:30,943 INFO L87 Difference]: Start difference. First operand 95 states and 157 transitions. Second operand 13 states. [2020-07-21 10:58:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:31,097 INFO L93 Difference]: Finished difference Result 110 states and 175 transitions. [2020-07-21 10:58:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:31,097 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 176 [2020-07-21 10:58:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:31,100 INFO L225 Difference]: With dead ends: 110 [2020-07-21 10:58:31,100 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 10:58:31,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 10:58:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-07-21 10:58:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 10:58:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-21 10:58:31,109 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 176 [2020-07-21 10:58:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:31,110 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-21 10:58:31,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-21 10:58:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-21 10:58:31,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:31,113 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:31,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:31,327 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:31,327 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 12 times [2020-07-21 10:58:31,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:31,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255446656] [2020-07-21 10:58:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:31,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 47 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2020-07-21 10:58:31,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:32,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 55 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-07-21 10:58:32,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255446656] [2020-07-21 10:58:32,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:32,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:32,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716938620] [2020-07-21 10:58:32,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:32,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:32,770 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 15 states. [2020-07-21 10:58:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:32,997 INFO L93 Difference]: Finished difference Result 123 states and 202 transitions. [2020-07-21 10:58:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:32,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2020-07-21 10:58:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:32,999 INFO L225 Difference]: With dead ends: 123 [2020-07-21 10:58:32,999 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 10:58:33,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 357 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 10:58:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-07-21 10:58:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 10:58:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 173 transitions. [2020-07-21 10:58:33,010 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 173 transitions. Word has length 191 [2020-07-21 10:58:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:33,010 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 173 transitions. [2020-07-21 10:58:33,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 173 transitions. [2020-07-21 10:58:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-21 10:58:33,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:33,013 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:33,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:33,226 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:33,226 INFO L82 PathProgramCache]: Analyzing trace with hash -31808317, now seen corresponding path program 13 times [2020-07-21 10:58:33,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:33,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936692656] [2020-07-21 10:58:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:58:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 102 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2020-07-21 10:58:33,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:34,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 116 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-07-21 10:58:35,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936692656] [2020-07-21 10:58:35,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:35,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:58:35,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242163846] [2020-07-21 10:58:35,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:35,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:35,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:35,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:35,274 INFO L87 Difference]: Start difference. First operand 101 states and 173 transitions. Second operand 17 states. [2020-07-21 10:58:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:35,560 INFO L93 Difference]: Finished difference Result 121 states and 205 transitions. [2020-07-21 10:58:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:35,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 204 [2020-07-21 10:58:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:35,563 INFO L225 Difference]: With dead ends: 121 [2020-07-21 10:58:35,563 INFO L226 Difference]: Without dead ends: 114 [2020-07-21 10:58:35,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 379 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:58:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-21 10:58:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2020-07-21 10:58:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 10:58:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 161 transitions. [2020-07-21 10:58:35,573 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 161 transitions. Word has length 204 [2020-07-21 10:58:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:35,574 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 161 transitions. [2020-07-21 10:58:35,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 161 transitions. [2020-07-21 10:58:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-21 10:58:35,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:35,576 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:35,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:35,792 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 14 times [2020-07-21 10:58:35,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:35,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447346153] [2020-07-21 10:58:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-21 10:58:35,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-21 10:58:36,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-21 10:58:38,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447346153] [2020-07-21 10:58:38,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:38,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 10:58:38,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426810166] [2020-07-21 10:58:38,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 10:58:38,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:38,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 10:58:38,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 10:58:38,237 INFO L87 Difference]: Start difference. First operand 93 states and 161 transitions. Second operand 36 states. [2020-07-21 10:58:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:39,086 INFO L93 Difference]: Finished difference Result 226 states and 521 transitions. [2020-07-21 10:58:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 10:58:39,087 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-07-21 10:58:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:39,099 INFO L225 Difference]: With dead ends: 226 [2020-07-21 10:58:39,099 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 10:58:39,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 10:58:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 10:58:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 145. [2020-07-21 10:58:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 10:58:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2020-07-21 10:58:39,136 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 177 [2020-07-21 10:58:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:39,136 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2020-07-21 10:58:39,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 10:58:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2020-07-21 10:58:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-21 10:58:39,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:39,141 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:39,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:39,355 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1104223868, now seen corresponding path program 15 times [2020-07-21 10:58:39,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:39,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371757468] [2020-07-21 10:58:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 148 proven. 142 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2020-07-21 10:58:39,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:40,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 148 proven. 152 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 10:58:40,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371757468] [2020-07-21 10:58:40,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:40,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:40,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891584158] [2020-07-21 10:58:40,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:40,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:40,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:40,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:40,848 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 15 states. [2020-07-21 10:58:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:41,139 INFO L93 Difference]: Finished difference Result 205 states and 526 transitions. [2020-07-21 10:58:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:41,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2020-07-21 10:58:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:41,144 INFO L225 Difference]: With dead ends: 205 [2020-07-21 10:58:41,144 INFO L226 Difference]: Without dead ends: 173 [2020-07-21 10:58:41,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 357 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-21 10:58:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 154. [2020-07-21 10:58:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 10:58:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 344 transitions. [2020-07-21 10:58:41,170 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 344 transitions. Word has length 191 [2020-07-21 10:58:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:41,171 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 344 transitions. [2020-07-21 10:58:41,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 344 transitions. [2020-07-21 10:58:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 10:58:41,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:41,176 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:41,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:41,390 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1441264276, now seen corresponding path program 16 times [2020-07-21 10:58:41,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:41,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772423153] [2020-07-21 10:58:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:41,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 93 proven. 203 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-07-21 10:58:41,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:42,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 97 proven. 207 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2020-07-21 10:58:42,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772423153] [2020-07-21 10:58:42,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:42,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:42,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82502641] [2020-07-21 10:58:42,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:42,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:42,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:42,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:42,850 INFO L87 Difference]: Start difference. First operand 154 states and 344 transitions. Second operand 15 states. [2020-07-21 10:58:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:43,093 INFO L93 Difference]: Finished difference Result 205 states and 460 transitions. [2020-07-21 10:58:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:43,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 10:58:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:43,097 INFO L225 Difference]: With dead ends: 205 [2020-07-21 10:58:43,097 INFO L226 Difference]: Without dead ends: 154 [2020-07-21 10:58:43,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 355 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:43,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-21 10:58:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2020-07-21 10:58:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-21 10:58:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 314 transitions. [2020-07-21 10:58:43,120 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 314 transitions. Word has length 190 [2020-07-21 10:58:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:43,121 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 314 transitions. [2020-07-21 10:58:43,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 314 transitions. [2020-07-21 10:58:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-21 10:58:43,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:43,126 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 12, 11, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:43,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:43,339 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2034664010, now seen corresponding path program 17 times [2020-07-21 10:58:43,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:43,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368497494] [2020-07-21 10:58:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:43,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2020-07-21 10:58:43,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:44,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:44,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:44,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:44,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:44,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:44,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:44,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 192 proven. 177 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2020-07-21 10:58:45,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368497494] [2020-07-21 10:58:45,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:45,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:45,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504987461] [2020-07-21 10:58:45,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:45,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:45,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:45,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:45,003 INFO L87 Difference]: Start difference. First operand 148 states and 314 transitions. Second operand 15 states. [2020-07-21 10:58:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:45,253 INFO L93 Difference]: Finished difference Result 203 states and 459 transitions. [2020-07-21 10:58:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:45,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 216 [2020-07-21 10:58:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:45,258 INFO L225 Difference]: With dead ends: 203 [2020-07-21 10:58:45,258 INFO L226 Difference]: Without dead ends: 166 [2020-07-21 10:58:45,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 407 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-21 10:58:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2020-07-21 10:58:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 10:58:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 320 transitions. [2020-07-21 10:58:45,281 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 320 transitions. Word has length 216 [2020-07-21 10:58:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:45,281 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 320 transitions. [2020-07-21 10:58:45,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 320 transitions. [2020-07-21 10:58:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-07-21 10:58:45,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:45,287 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 11, 10, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:45,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:45,503 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:45,503 INFO L82 PathProgramCache]: Analyzing trace with hash -474236136, now seen corresponding path program 18 times [2020-07-21 10:58:45,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:45,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100492398] [2020-07-21 10:58:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:45,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 258 proven. 84 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2020-07-21 10:58:45,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:46,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 260 proven. 90 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-21 10:58:47,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100492398] [2020-07-21 10:58:47,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:47,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:47,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825145275] [2020-07-21 10:58:47,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:47,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:47,093 INFO L87 Difference]: Start difference. First operand 154 states and 320 transitions. Second operand 15 states. [2020-07-21 10:58:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:47,303 INFO L93 Difference]: Finished difference Result 185 states and 377 transitions. [2020-07-21 10:58:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:47,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 214 [2020-07-21 10:58:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:47,306 INFO L225 Difference]: With dead ends: 185 [2020-07-21 10:58:47,306 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 10:58:47,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 403 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 10:58:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 149. [2020-07-21 10:58:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 10:58:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 310 transitions. [2020-07-21 10:58:47,328 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 310 transitions. Word has length 214 [2020-07-21 10:58:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:47,328 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 310 transitions. [2020-07-21 10:58:47,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 310 transitions. [2020-07-21 10:58:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 10:58:47,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:47,333 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:47,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:47,548 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:47,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1674908912, now seen corresponding path program 19 times [2020-07-21 10:58:47,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:47,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27769613] [2020-07-21 10:58:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:58:47,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 124 proven. 130 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-21 10:58:47,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:48,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 125 proven. 133 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 10:58:48,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27769613] [2020-07-21 10:58:48,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:48,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 10:58:48,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540358939] [2020-07-21 10:58:48,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:48,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:48,965 INFO L87 Difference]: Start difference. First operand 149 states and 310 transitions. Second operand 15 states. [2020-07-21 10:58:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:49,242 INFO L93 Difference]: Finished difference Result 196 states and 432 transitions. [2020-07-21 10:58:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:49,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-21 10:58:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:49,250 INFO L225 Difference]: With dead ends: 196 [2020-07-21 10:58:49,250 INFO L226 Difference]: Without dead ends: 161 [2020-07-21 10:58:49,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:58:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-21 10:58:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2020-07-21 10:58:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 10:58:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 310 transitions. [2020-07-21 10:58:49,271 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 310 transitions. Word has length 189 [2020-07-21 10:58:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:49,271 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 310 transitions. [2020-07-21 10:58:49,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 310 transitions. [2020-07-21 10:58:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 10:58:49,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:49,276 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:49,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:49,490 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:49,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:49,490 INFO L82 PathProgramCache]: Analyzing trace with hash -75415662, now seen corresponding path program 20 times [2020-07-21 10:58:49,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:49,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073030451] [2020-07-21 10:58:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:49,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 204 proven. 34 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2020-07-21 10:58:49,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:50,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 204 proven. 40 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-07-21 10:58:50,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073030451] [2020-07-21 10:58:50,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:50,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:50,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868687643] [2020-07-21 10:58:50,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:50,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:50,609 INFO L87 Difference]: Start difference. First operand 149 states and 310 transitions. Second operand 13 states. [2020-07-21 10:58:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:50,805 INFO L93 Difference]: Finished difference Result 175 states and 357 transitions. [2020-07-21 10:58:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:50,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 190 [2020-07-21 10:58:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:50,809 INFO L225 Difference]: With dead ends: 175 [2020-07-21 10:58:50,809 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 10:58:50,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 359 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 10:58:50,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2020-07-21 10:58:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 10:58:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 310 transitions. [2020-07-21 10:58:50,829 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 310 transitions. Word has length 190 [2020-07-21 10:58:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:50,830 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 310 transitions. [2020-07-21 10:58:50,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:50,830 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 310 transitions. [2020-07-21 10:58:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 10:58:50,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:50,834 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:51,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:51,051 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1083167591, now seen corresponding path program 21 times [2020-07-21 10:58:51,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:51,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165602641] [2020-07-21 10:58:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:58:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 155 proven. 174 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2020-07-21 10:58:51,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:52,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:52,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:52,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:52,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:52,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:52,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 153 proven. 184 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2020-07-21 10:58:52,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165602641] [2020-07-21 10:58:52,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:52,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 10:58:52,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772784176] [2020-07-21 10:58:52,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:52,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:52,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:52,834 INFO L87 Difference]: Start difference. First operand 149 states and 310 transitions. Second operand 17 states. [2020-07-21 10:58:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:53,164 INFO L93 Difference]: Finished difference Result 193 states and 402 transitions. [2020-07-21 10:58:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:53,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 201 [2020-07-21 10:58:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:53,168 INFO L225 Difference]: With dead ends: 193 [2020-07-21 10:58:53,168 INFO L226 Difference]: Without dead ends: 161 [2020-07-21 10:58:53,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 375 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:58:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-21 10:58:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 146. [2020-07-21 10:58:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 10:58:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 297 transitions. [2020-07-21 10:58:53,187 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 297 transitions. Word has length 201 [2020-07-21 10:58:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:53,187 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 297 transitions. [2020-07-21 10:58:53,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 297 transitions. [2020-07-21 10:58:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-21 10:58:53,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:53,191 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 10, 10, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:53,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:53,406 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash 878848244, now seen corresponding path program 22 times [2020-07-21 10:58:53,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:53,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175445] [2020-07-21 10:58:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:53,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:58:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 109 proven. 244 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2020-07-21 10:58:53,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:54,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:54,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:54,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:54,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 109 proven. 252 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-07-21 10:58:55,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175445] [2020-07-21 10:58:55,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:55,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 10:58:55,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688712567] [2020-07-21 10:58:55,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:55,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:55,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:55,289 INFO L87 Difference]: Start difference. First operand 146 states and 297 transitions. Second operand 17 states. [2020-07-21 10:58:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:55,545 INFO L93 Difference]: Finished difference Result 197 states and 403 transitions. [2020-07-21 10:58:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:55,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 213 [2020-07-21 10:58:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:55,549 INFO L225 Difference]: With dead ends: 197 [2020-07-21 10:58:55,549 INFO L226 Difference]: Without dead ends: 146 [2020-07-21 10:58:55,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 399 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:58:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-21 10:58:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-07-21 10:58:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 10:58:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2020-07-21 10:58:55,567 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 213 [2020-07-21 10:58:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:55,567 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2020-07-21 10:58:55,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2020-07-21 10:58:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 10:58:55,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:55,572 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:55,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:55,786 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1483992651, now seen corresponding path program 23 times [2020-07-21 10:58:55,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:55,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448911676] [2020-07-21 10:58:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:56,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:58:56,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 239 proven. 90 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2020-07-21 10:58:56,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:56,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:56,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:57,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:57,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:57,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:57,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:57,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:57,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 237 proven. 100 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2020-07-21 10:58:57,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448911676] [2020-07-21 10:58:57,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:57,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 10:58:57,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94489477] [2020-07-21 10:58:57,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:57,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:57,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:57,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:57,672 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand 17 states. [2020-07-21 10:58:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:57,966 INFO L93 Difference]: Finished difference Result 180 states and 348 transitions. [2020-07-21 10:58:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:57,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 201 [2020-07-21 10:58:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:57,969 INFO L225 Difference]: With dead ends: 180 [2020-07-21 10:58:57,969 INFO L226 Difference]: Without dead ends: 173 [2020-07-21 10:58:57,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 375 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:58:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-21 10:58:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2020-07-21 10:58:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 10:58:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 254 transitions. [2020-07-21 10:58:57,986 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 254 transitions. Word has length 201 [2020-07-21 10:58:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:57,987 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 254 transitions. [2020-07-21 10:58:57,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 254 transitions. [2020-07-21 10:58:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 10:58:57,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:57,990 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 10, 10, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:58,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:58,204 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash 748557275, now seen corresponding path program 24 times [2020-07-21 10:58:58,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:58,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083476311] [2020-07-21 10:58:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:58,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:58:58,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 203 proven. 69 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2020-07-21 10:58:58,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:59,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 202 proven. 76 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-07-21 10:58:59,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083476311] [2020-07-21 10:58:59,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:59,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 10:58:59,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649149488] [2020-07-21 10:58:59,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:59,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:59,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:59,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:59,622 INFO L87 Difference]: Start difference. First operand 136 states and 254 transitions. Second operand 15 states. [2020-07-21 10:58:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:59,857 INFO L93 Difference]: Finished difference Result 168 states and 320 transitions. [2020-07-21 10:58:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:59,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 201 [2020-07-21 10:58:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:59,861 INFO L225 Difference]: With dead ends: 168 [2020-07-21 10:58:59,861 INFO L226 Difference]: Without dead ends: 161 [2020-07-21 10:58:59,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 379 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:58:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-21 10:58:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 128. [2020-07-21 10:58:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-21 10:58:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 238 transitions. [2020-07-21 10:58:59,877 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 238 transitions. Word has length 201 [2020-07-21 10:58:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:59,877 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 238 transitions. [2020-07-21 10:58:59,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 238 transitions. [2020-07-21 10:58:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 10:58:59,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:59,880 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:00,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:00,095 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:00,095 INFO L82 PathProgramCache]: Analyzing trace with hash -140375518, now seen corresponding path program 25 times [2020-07-21 10:59:00,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:00,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505070081] [2020-07-21 10:59:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:59:00,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 211 proven. 43 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-21 10:59:00,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:00,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:01,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:01,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:01,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:01,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:01,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 10:59:01,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505070081] [2020-07-21 10:59:01,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:01,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 10:59:01,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459615922] [2020-07-21 10:59:01,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:59:01,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:01,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:59:01,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:59:01,456 INFO L87 Difference]: Start difference. First operand 128 states and 238 transitions. Second operand 15 states. [2020-07-21 10:59:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:01,661 INFO L93 Difference]: Finished difference Result 147 states and 264 transitions. [2020-07-21 10:59:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:59:01,662 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-21 10:59:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:01,665 INFO L225 Difference]: With dead ends: 147 [2020-07-21 10:59:01,665 INFO L226 Difference]: Without dead ends: 140 [2020-07-21 10:59:01,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-21 10:59:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2020-07-21 10:59:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 10:59:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 192 transitions. [2020-07-21 10:59:01,676 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 192 transitions. Word has length 189 [2020-07-21 10:59:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:01,677 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 192 transitions. [2020-07-21 10:59:01,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:59:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 192 transitions. [2020-07-21 10:59:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-21 10:59:01,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:01,679 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:01,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:01,893 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:01,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2096855727, now seen corresponding path program 26 times [2020-07-21 10:59:01,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:01,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657498726] [2020-07-21 10:59:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:02,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 69 proven. 241 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-07-21 10:59:02,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:03,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 73 proven. 251 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2020-07-21 10:59:03,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657498726] [2020-07-21 10:59:03,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:03,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:59:03,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675259398] [2020-07-21 10:59:03,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:03,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:03,937 INFO L87 Difference]: Start difference. First operand 107 states and 192 transitions. Second operand 17 states. [2020-07-21 10:59:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:04,292 INFO L93 Difference]: Finished difference Result 168 states and 323 transitions. [2020-07-21 10:59:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:04,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 178 [2020-07-21 10:59:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:04,295 INFO L225 Difference]: With dead ends: 168 [2020-07-21 10:59:04,295 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 10:59:04,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 327 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 10:59:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-21 10:59:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 10:59:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 148 transitions. [2020-07-21 10:59:04,305 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 148 transitions. Word has length 178 [2020-07-21 10:59:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:04,306 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 148 transitions. [2020-07-21 10:59:04,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 148 transitions. [2020-07-21 10:59:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 10:59:04,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:04,308 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:04,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:04,523 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:04,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:04,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1148569106, now seen corresponding path program 27 times [2020-07-21 10:59:04,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:04,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678956607] [2020-07-21 10:59:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:59:04,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 212 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-21 10:59:04,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:05,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:06,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:06,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:06,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:06,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:06,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 220 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-21 10:59:06,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678956607] [2020-07-21 10:59:06,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:06,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 10:59:06,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58491665] [2020-07-21 10:59:06,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:06,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:06,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:06,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:06,320 INFO L87 Difference]: Start difference. First operand 104 states and 148 transitions. Second operand 17 states. [2020-07-21 10:59:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:06,706 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-07-21 10:59:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:06,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-21 10:59:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:06,709 INFO L225 Difference]: With dead ends: 152 [2020-07-21 10:59:06,710 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 10:59:06,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:59:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 10:59:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-07-21 10:59:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 10:59:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-07-21 10:59:06,725 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 189 [2020-07-21 10:59:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:06,725 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-07-21 10:59:06,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-07-21 10:59:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 10:59:06,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:06,729 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:06,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:06,942 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:06,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1803358882, now seen corresponding path program 28 times [2020-07-21 10:59:06,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:06,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255622506] [2020-07-21 10:59:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:07,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 10:59:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 89 proven. 260 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2020-07-21 10:59:07,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:08,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 87 proven. 276 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-07-21 10:59:09,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255622506] [2020-07-21 10:59:09,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:09,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 10:59:09,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729867842] [2020-07-21 10:59:09,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:59:09,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:09,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:59:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:09,398 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 19 states. [2020-07-21 10:59:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:09,772 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-07-21 10:59:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:59:09,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 189 [2020-07-21 10:59:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:09,774 INFO L225 Difference]: With dead ends: 137 [2020-07-21 10:59:09,774 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:59:09,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 347 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:59:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:59:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:59:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:59:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:59:09,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2020-07-21 10:59:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:09,779 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:59:09,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:59:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:59:09,779 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:59:09,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:09,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:59:10,613 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 29 [2020-07-21 10:59:10,928 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 45 [2020-07-21 10:59:11,203 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 45 [2020-07-21 10:59:11,464 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 45 [2020-07-21 10:59:11,718 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 60 [2020-07-21 10:59:12,058 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 68 [2020-07-21 10:59:12,271 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 60 [2020-07-21 10:59:12,487 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 45 [2020-07-21 10:59:12,826 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 68 [2020-07-21 10:59:13,150 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 55 [2020-07-21 10:59:13,285 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 45 [2020-07-21 10:59:13,481 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 61 [2020-07-21 10:59:13,674 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 61 [2020-07-21 10:59:13,880 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 60 [2020-07-21 10:59:14,266 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 68 [2020-07-21 10:59:14,527 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 45 [2020-07-21 10:59:14,712 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 60 [2020-07-21 10:59:14,871 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 68 [2020-07-21 10:59:14,985 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 60 [2020-07-21 10:59:15,144 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 45 [2020-07-21 10:59:15,269 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 61 [2020-07-21 10:59:15,511 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 60 [2020-07-21 10:59:15,756 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 68 [2020-07-21 10:59:16,001 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 68 [2020-07-21 10:59:16,184 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 45 [2020-07-21 10:59:16,357 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 57 [2020-07-21 10:59:16,536 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 57 [2020-07-21 10:59:16,808 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:17,093 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:17,225 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 76 [2020-07-21 10:59:17,371 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-21 10:59:17,653 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:17,901 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 79 [2020-07-21 10:59:18,060 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 57 [2020-07-21 10:59:18,333 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:18,585 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 82 [2020-07-21 10:59:18,719 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 45 [2020-07-21 10:59:18,991 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:19,151 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 57 [2020-07-21 10:59:19,329 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 57 [2020-07-21 10:59:19,628 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:19,853 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 79 [2020-07-21 10:59:20,080 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 79 [2020-07-21 10:59:20,309 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 79 [2020-07-21 10:59:20,595 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:20,852 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 82 [2020-07-21 10:59:20,983 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-21 10:59:21,099 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 44 [2020-07-21 10:59:21,217 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 45 [2020-07-21 10:59:21,383 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 57 [2020-07-21 10:59:21,764 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 92 [2020-07-21 10:59:22,053 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:22,169 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 51 [2020-07-21 10:59:22,461 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 84 [2020-07-21 10:59:22,579 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 51 [2020-07-21 10:59:22,707 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 45 [2020-07-21 10:59:22,809 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 44 [2020-07-21 10:59:23,869 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 128 DAG size of output: 27 [2020-07-21 10:59:24,764 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 26 [2020-07-21 10:59:24,769 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:59:24,769 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:59:24,769 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:59:24,769 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:59:24,769 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:59:24,769 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:59:24,770 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 10:59:24,770 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 10:59:24,770 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 10:59:24,770 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 10:59:24,770 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 10:59:24,770 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 10:59:24,771 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2020-07-21 10:59:24,771 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 10:59:24,771 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 10:59:24,771 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 10:59:24,771 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 10:59:24,771 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 10:59:24,772 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (and (= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 3)))) (and (<= fibo2_~n |fibo2_#in~n|) (or (= 3 |fibo2_#t~ret2|) (<= 6 |fibo2_#in~n|) .cse0 (and (<= 4 |fibo2_#in~n|) (<= |fibo2_#in~n| 4))) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|) (or (<= 5 |fibo2_#in~n|) .cse0 (= 2 |fibo2_#t~ret2|)))) [2020-07-21 10:59:24,772 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 10:59:24,772 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 10:59:24,772 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 10:59:24,772 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 10:59:24,773 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 10:59:24,773 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 10:59:24,773 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 10:59:24,773 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 10:59:24,773 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (or (<= 5 |fibo1_#in~n|) (and (= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3)) (and (= 2 |fibo1_#t~ret0|) (<= 4 |fibo1_#in~n|))) (or (= 5 |fibo1_#t~ret0|) (<= 7 |fibo1_#in~n|) (<= |fibo1_#in~n| 5)) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 10:59:24,773 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 10:59:24,773 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 10:59:24,773 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 10:59:24,774 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 10:59:24,774 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 10:59:24,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:59:24 BoogieIcfgContainer [2020-07-21 10:59:24,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:59:24,780 INFO L168 Benchmark]: Toolchain (without parser) took 87637.27 ms. Allocated memory was 145.2 MB in the beginning and 921.7 MB in the end (delta: 776.5 MB). Free memory was 102.3 MB in the beginning and 442.3 MB in the end (delta: -340.0 MB). Peak memory consumption was 769.1 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,781 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.49 ms. Allocated memory is still 145.2 MB. Free memory was 101.9 MB in the beginning and 92.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,782 INFO L168 Benchmark]: Boogie Preprocessor took 115.99 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 92.3 MB in the beginning and 181.7 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,782 INFO L168 Benchmark]: RCFGBuilder took 284.30 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 168.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,783 INFO L168 Benchmark]: TraceAbstraction took 86982.76 ms. Allocated memory was 202.9 MB in the beginning and 921.7 MB in the end (delta: 718.8 MB). Free memory was 168.2 MB in the beginning and 442.3 MB in the end (delta: -274.2 MB). Peak memory consumption was 777.3 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,785 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.49 ms. Allocated memory is still 145.2 MB. Free memory was 101.9 MB in the beginning and 92.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.99 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 92.3 MB in the beginning and 181.7 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 284.30 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 168.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 86982.76 ms. Allocated memory was 202.9 MB in the beginning and 921.7 MB in the end (delta: 718.8 MB). Free memory was 168.2 MB in the beginning and 442.3 MB in the end (delta: -274.2 MB). Peak memory consumption was 777.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 72.0s, OverallIterations: 41, TraceHistogramMax: 18, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1220 SDtfs, 1462 SDslu, 8606 SDs, 0 SdLazy, 7753 SolverSat, 1086 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12162 GetRequests, 11086 SyntacticMatches, 375 SemanticMatches, 701 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 41 MinimizatonAttempts, 726 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 263 PreInvPairs, 6307 NumberOfFragments, 116 HoareAnnotationTreeSize, 263 FomulaSimplifications, 1015595106 FormulaSimplificationTreeSizeReduction, 12.8s HoareSimplificationTime, 11 FomulaSimplificationsInter, 39212 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 45.5s InterpolantComputationTime, 6015 NumberOfCodeBlocks, 6015 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 11923 ConstructedInterpolants, 0 QuantifiedInterpolants, 3348981 SizeOfPredicates, 214 NumberOfNonLiveVariables, 13409 ConjunctsInSsa, 539 ConjunctsInUnsatCore, 80 InterpolantComputations, 2 PerfectInterpolantSequences, 44240/53102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...