/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 [2020-07-20 13:34:39,889 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 13:34:39,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:34:39,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:34:39,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:34:39,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:34:39,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:34:39,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:34:39,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:34:39,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:34:39,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:34:39,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:34:39,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:34:39,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:34:39,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:34:39,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:34:39,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:34:39,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:34:39,987 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 [2020-07-20 13:34:40,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:34:40,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:34:40,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:34:40,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:34:40,036 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:34:40,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:34:40,037 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:34:40,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:34:40,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:34:40,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:34:40,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:34:40,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:34:40,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:34:40,041 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:34:40,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:34:40,042 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:34:40,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:34:40,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:34:40,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:34:40,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:34:40,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:34:40,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:34:40,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:34:40,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:34:40,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:34:40,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:34:40,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:40,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:34:40,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:34:40,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:34:40,486 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:34:40,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:34:40,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:34:40,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:34:40,517 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:34:40,518 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-20 13:34:40,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00128df39/dc164912ad634f19b0b5b2f3e53ed5fc/FLAG9acf747c8 [2020-07-20 13:34:41,322 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:34:41,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-20 13:34:41,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00128df39/dc164912ad634f19b0b5b2f3e53ed5fc/FLAG9acf747c8 [2020-07-20 13:34:41,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00128df39/dc164912ad634f19b0b5b2f3e53ed5fc [2020-07-20 13:34:41,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:34:41,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:34:41,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:34:41,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:34:41,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:34:41,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:34:41" (1/1) ... [2020-07-20 13:34:41,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425c0372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:41, skipping insertion in model container [2020-07-20 13:34:41,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:34:41" (1/1) ... [2020-07-20 13:34:41,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:34:41,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:34:41,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:34:41,960 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:34:41,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:34:42,000 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:34:42,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42 WrapperNode [2020-07-20 13:34:42,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:34:42,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:34:42,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:34:42,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:34:42,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (1/1) ... [2020-07-20 13:34:42,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (1/1) ... [2020-07-20 13:34:42,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (1/1) ... [2020-07-20 13:34:42,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (1/1) ... [2020-07-20 13:34:42,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (1/1) ... [2020-07-20 13:34:42,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (1/1) ... [2020-07-20 13:34:42,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (1/1) ... [2020-07-20 13:34:42,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:34:42,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:34:42,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:34:42,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:34:42,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (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 [2020-07-20 13:34:42,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:34:42,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:34:42,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 13:34:42,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 13:34:42,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:34:42,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:34:42,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:34:42,289 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 13:34:42,289 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 13:34:42,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:34:42,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:34:42,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:34:42,582 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:34:42,583 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:34:42,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:34:42 BoogieIcfgContainer [2020-07-20 13:34:42,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:34:42,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:34:42,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:34:42,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:34:42,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:34:41" (1/3) ... [2020-07-20 13:34:42,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b9ac39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:34:42, skipping insertion in model container [2020-07-20 13:34:42,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:42" (2/3) ... [2020-07-20 13:34:42,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b9ac39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:34:42, skipping insertion in model container [2020-07-20 13:34:42,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:34:42" (3/3) ... [2020-07-20 13:34:42,607 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-07-20 13:34:42,625 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:34:42,639 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:34:42,677 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:34:42,766 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:34:42,767 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:34:42,767 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:34:42,767 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:34:42,768 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:34:42,772 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:34:42,772 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:34:42,772 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:34:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 13:34:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:34:42,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:42,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:42,861 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:42,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 13:34:42,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:42,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279698924] [2020-07-20 13:34:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:42,979 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:42,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:34:42,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:34:43,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:34:43,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279698924] [2020-07-20 13:34:43,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:34:43,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:34:43,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54014740] [2020-07-20 13:34:43,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:34:43,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:43,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:34:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:34:43,149 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 13:34:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:43,336 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 13:34:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:34:43,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:34:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:43,359 INFO L225 Difference]: With dead ends: 44 [2020-07-20 13:34:43,359 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 13:34:43,365 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 [2020-07-20 13:34:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 13:34:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 13:34:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:34:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 13:34:43,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 13:34:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:43,435 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 13:34:43,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:34:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 13:34:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:34:43,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:43,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:43,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:43,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 13:34:43,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:43,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355380815] [2020-07-20 13:34:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:43,718 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:43,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:43,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:34:43,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:34:43,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:34:43,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355380815] [2020-07-20 13:34:43,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:34:43,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:34:43,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588739486] [2020-07-20 13:34:43,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:34:43,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:43,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:34:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:34:43,812 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 13:34:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:43,935 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 13:34:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:34:43,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:34:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:43,939 INFO L225 Difference]: With dead ends: 36 [2020-07-20 13:34:43,939 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 13:34:43,941 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 [2020-07-20 13:34:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 13:34:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 13:34:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:34:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 13:34:43,954 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 13:34:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:43,954 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 13:34:43,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:34:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 13:34:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 13:34:43,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:43,957 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] [2020-07-20 13:34:44,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:44,161 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 13:34:44,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:44,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785852323] [2020-07-20 13:34:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:44,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:44,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:34:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:44,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:44,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:44,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785852323] [2020-07-20 13:34:44,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:44,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:34:44,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449878163] [2020-07-20 13:34:44,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:34:44,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:44,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:34:44,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:34:44,784 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 13:34:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:44,989 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 13:34:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:34:44,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 13:34:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:44,993 INFO L225 Difference]: With dead ends: 41 [2020-07-20 13:34:44,993 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 13:34:44,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 13:34:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 13:34:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:34:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 13:34:45,007 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 13:34:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:45,008 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 13:34:45,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:34:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 13:34:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:34:45,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:45,011 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] [2020-07-20 13:34:45,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:45,227 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:45,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 13:34:45,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:45,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75710703] [2020-07-20 13:34:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:45,274 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:45,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:45,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:34:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:45,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:45,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:45,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75710703] [2020-07-20 13:34:45,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:45,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:34:45,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317467514] [2020-07-20 13:34:45,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:34:45,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:34:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:34:45,565 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 13:34:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:45,753 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 13:34:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:34:45,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 13:34:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:45,760 INFO L225 Difference]: With dead ends: 46 [2020-07-20 13:34:45,761 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:34:45,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:34:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 13:34:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:34:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 13:34:45,798 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 13:34:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:45,802 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 13:34:45,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:34:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 13:34:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 13:34:45,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:45,807 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] [2020-07-20 13:34:46,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:46,023 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 13:34:46,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:46,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62139679] [2020-07-20 13:34:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:34:46,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:46,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:46,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 13:34:46,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:46,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:34:46,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62139679] [2020-07-20 13:34:46,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:46,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 13:34:46,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629416600] [2020-07-20 13:34:46,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:34:46,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:34:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:46,700 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 13:34:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:46,946 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 13:34:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:46,947 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 13:34:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:46,949 INFO L225 Difference]: With dead ends: 51 [2020-07-20 13:34:46,950 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 13:34:46,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 13:34:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 13:34:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:34:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 13:34:46,965 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 13:34:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:46,966 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 13:34:46,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:34:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 13:34:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:34:46,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:46,969 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] [2020-07-20 13:34:47,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:47,185 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 13:34:47,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:47,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809906570] [2020-07-20 13:34:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:47,228 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:47,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:47,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:47,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:34:47,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:47,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:34:47,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809906570] [2020-07-20 13:34:47,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:47,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 13:34:47,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895950786] [2020-07-20 13:34:47,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:34:47,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:47,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:34:47,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:47,719 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 13:34:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:48,008 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 13:34:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:48,009 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 13:34:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:48,020 INFO L225 Difference]: With dead ends: 56 [2020-07-20 13:34:48,021 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 13:34:48,025 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 [2020-07-20 13:34:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 13:34:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 13:34:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:34:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 13:34:48,058 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 13:34:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:48,063 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 13:34:48,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:34:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 13:34:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 13:34:48,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:48,070 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] [2020-07-20 13:34:48,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:48,286 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 13:34:48,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:48,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441840413] [2020-07-20 13:34:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:48,347 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 13:34:48,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:48,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:48,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:48,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:49,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:34:49,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441840413] [2020-07-20 13:34:49,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:49,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 13:34:49,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020828250] [2020-07-20 13:34:49,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 13:34:49,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:49,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 13:34:49,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:34:49,125 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 13:34:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:49,397 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 13:34:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:49,398 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 13:34:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:49,401 INFO L225 Difference]: With dead ends: 61 [2020-07-20 13:34:49,402 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 13:34:49,403 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 [2020-07-20 13:34:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 13:34:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 13:34:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:34:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 13:34:49,419 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 13:34:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:49,419 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 13:34:49,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 13:34:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 13:34:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 13:34:49,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:49,423 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] [2020-07-20 13:34:49,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:49,638 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 13:34:49,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:49,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923673311] [2020-07-20 13:34:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:49,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:49,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:49,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:49,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 13:34:49,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:50,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:50,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:50,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:50,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:50,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:34:50,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923673311] [2020-07-20 13:34:50,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:50,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 13:34:50,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566081582] [2020-07-20 13:34:50,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 13:34:50,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:50,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 13:34:50,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:34:50,405 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 13:34:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:50,579 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 13:34:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:50,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 13:34:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:50,582 INFO L225 Difference]: With dead ends: 66 [2020-07-20 13:34:50,582 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 13:34:50,583 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 [2020-07-20 13:34:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 13:34:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 13:34:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:34:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 13:34:50,594 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 13:34:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:50,594 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 13:34:50,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 13:34:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 13:34:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 13:34:50,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:50,596 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] [2020-07-20 13:34:50,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:50,811 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 13:34:50,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:50,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193205089] [2020-07-20 13:34:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:34:50,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:50,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:34:50,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 13:34:50,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:51,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:51,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:51,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:51,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:51,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:51,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:51,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 13:34:51,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193205089] [2020-07-20 13:34:51,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:51,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 13:34:51,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041923740] [2020-07-20 13:34:51,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 13:34:51,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:51,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 13:34:51,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:34:51,912 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 13:34:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:52,176 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 13:34:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:34:52,177 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 13:34:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:52,179 INFO L225 Difference]: With dead ends: 71 [2020-07-20 13:34:52,180 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 13:34:52,181 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 [2020-07-20 13:34:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 13:34:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 13:34:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 13:34:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 13:34:52,193 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 13:34:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:52,194 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 13:34:52,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 13:34:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 13:34:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 13:34:52,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:52,196 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] [2020-07-20 13:34:52,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:52,410 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:52,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 13:34:52,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:52,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850862606] [2020-07-20 13:34:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:34:52,482 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:34:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 13:34:52,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:53,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:53,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:53,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:53,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 13:34:53,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850862606] [2020-07-20 13:34:53,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:53,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:34:53,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327249763] [2020-07-20 13:34:53,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:34:53,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:34:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:53,536 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 15 states. [2020-07-20 13:34:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:53,795 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 13:34:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:34:53,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 108 [2020-07-20 13:34:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:53,798 INFO L225 Difference]: With dead ends: 76 [2020-07-20 13:34:53,798 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 13:34:53,799 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 [2020-07-20 13:34:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 13:34:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 13:34:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 13:34:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 13:34:53,828 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 13:34:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:53,829 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 13:34:53,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:34:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 13:34:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 13:34:53,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:53,833 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] [2020-07-20 13:34:54,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:54,050 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 13:34:54,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:54,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208248157] [2020-07-20 13:34:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:34:54,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:54,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:54,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:34:54,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 13:34:54,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:55,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 13:34:55,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208248157] [2020-07-20 13:34:55,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:55,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 13:34:55,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562518017] [2020-07-20 13:34:55,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:34:55,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:55,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:34:55,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:34:55,980 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 17 states. [2020-07-20 13:34:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:56,257 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 13:34:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:34:56,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 208 [2020-07-20 13:34:56,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:56,260 INFO L225 Difference]: With dead ends: 81 [2020-07-20 13:34:56,260 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 13:34:56,261 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 [2020-07-20 13:34:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 13:34:56,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 13:34:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 13:34:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 13:34:56,274 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 13:34:56,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:56,275 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 13:34:56,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:34:56,275 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 13:34:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-20 13:34:56,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:56,278 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] [2020-07-20 13:34:56,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:56,486 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1298373331, now seen corresponding path program 2 times [2020-07-20 13:34:56,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:56,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495205615] [2020-07-20 13:34:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:34:56,594 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:56,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:56,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:34:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 156 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 13:34:56,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:57,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 164 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-07-20 13:34:57,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495205615] [2020-07-20 13:34:57,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:57,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:34:57,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362828387] [2020-07-20 13:34:57,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:34:57,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:57,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:34:57,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:57,718 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 15 states. [2020-07-20 13:34:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:57,941 INFO L93 Difference]: Finished difference Result 99 states and 221 transitions. [2020-07-20 13:34:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:34:57,944 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-20 13:34:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:57,949 INFO L225 Difference]: With dead ends: 99 [2020-07-20 13:34:57,949 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 13:34:57,950 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 [2020-07-20 13:34:57,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 13:34:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2020-07-20 13:34:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 13:34:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 92 transitions. [2020-07-20 13:34:57,963 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 92 transitions. Word has length 148 [2020-07-20 13:34:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:57,964 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 92 transitions. [2020-07-20 13:34:57,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:34:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 92 transitions. [2020-07-20 13:34:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 13:34:57,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:57,966 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] [2020-07-20 13:34:58,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:58,180 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times [2020-07-20 13:34:58,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:58,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720438551] [2020-07-20 13:34:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:34:58,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-07-20 13:34:58,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:58,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:58,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:58,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:58,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 94 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-20 13:34:58,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720438551] [2020-07-20 13:34:58,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:58,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:34:58,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324846531] [2020-07-20 13:34:58,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:58,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:58,977 INFO L87 Difference]: Start difference. First operand 57 states and 92 transitions. Second operand 13 states. [2020-07-20 13:34:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:59,179 INFO L93 Difference]: Finished difference Result 99 states and 217 transitions. [2020-07-20 13:34:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:59,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-07-20 13:34:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:59,183 INFO L225 Difference]: With dead ends: 99 [2020-07-20 13:34:59,184 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 13:34:59,187 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 [2020-07-20 13:34:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 13:34:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2020-07-20 13:34:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 13:34:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 98 transitions. [2020-07-20 13:34:59,210 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 98 transitions. Word has length 123 [2020-07-20 13:34:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:59,211 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 98 transitions. [2020-07-20 13:34:59,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 98 transitions. [2020-07-20 13:34:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-20 13:34:59,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:59,215 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] [2020-07-20 13:34:59,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:59,428 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1017418174, now seen corresponding path program 1 times [2020-07-20 13:34:59,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:59,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854297531] [2020-07-20 13:34:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:34:59,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:59,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:59,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:34:59,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 114 proven. 290 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2020-07-20 13:34:59,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:00,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:00,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 116 proven. 304 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2020-07-20 13:35:01,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854297531] [2020-07-20 13:35:01,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:01,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 13:35:01,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139145947] [2020-07-20 13:35:01,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:01,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:01,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:01,372 INFO L87 Difference]: Start difference. First operand 59 states and 98 transitions. Second operand 17 states. [2020-07-20 13:35:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:01,738 INFO L93 Difference]: Finished difference Result 113 states and 271 transitions. [2020-07-20 13:35:01,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:01,738 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 216 [2020-07-20 13:35:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:01,744 INFO L225 Difference]: With dead ends: 113 [2020-07-20 13:35:01,745 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 13:35:01,748 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 [2020-07-20 13:35:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 13:35:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-20 13:35:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 13:35:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 104 transitions. [2020-07-20 13:35:01,763 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 104 transitions. Word has length 216 [2020-07-20 13:35:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:01,765 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 104 transitions. [2020-07-20 13:35:01,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 104 transitions. [2020-07-20 13:35:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 13:35:01,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:01,771 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] [2020-07-20 13:35:01,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:01,987 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:01,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1521837768, now seen corresponding path program 2 times [2020-07-20 13:35:01,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:01,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103564621] [2020-07-20 13:35:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:02,108 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:02,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:02,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 114 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-07-20 13:35:02,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:02,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:02,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:02,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 122 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-20 13:35:03,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103564621] [2020-07-20 13:35:03,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:03,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:35:03,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295998726] [2020-07-20 13:35:03,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:03,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:03,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:03,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:03,216 INFO L87 Difference]: Start difference. First operand 67 states and 104 transitions. Second operand 15 states. [2020-07-20 13:35:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:03,455 INFO L93 Difference]: Finished difference Result 107 states and 201 transitions. [2020-07-20 13:35:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:03,456 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-20 13:35:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:03,458 INFO L225 Difference]: With dead ends: 107 [2020-07-20 13:35:03,459 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 13:35:03,460 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 [2020-07-20 13:35:03,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 13:35:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 70. [2020-07-20 13:35:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 13:35:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 112 transitions. [2020-07-20 13:35:03,472 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 112 transitions. Word has length 135 [2020-07-20 13:35:03,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:03,473 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 112 transitions. [2020-07-20 13:35:03,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 112 transitions. [2020-07-20 13:35:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-20 13:35:03,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:03,476 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] [2020-07-20 13:35:03,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:03,691 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:03,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1102424554, now seen corresponding path program 3 times [2020-07-20 13:35:03,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:03,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744084544] [2020-07-20 13:35:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:03,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:03,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:03,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:35:03,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 114 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-07-20 13:35:03,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:04,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 130 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 13:35:05,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744084544] [2020-07-20 13:35:05,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:05,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 13:35:05,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480509737] [2020-07-20 13:35:05,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:05,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:05,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:05,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:05,600 INFO L87 Difference]: Start difference. First operand 70 states and 112 transitions. Second operand 17 states. [2020-07-20 13:35:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:05,989 INFO L93 Difference]: Finished difference Result 107 states and 197 transitions. [2020-07-20 13:35:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:05,990 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2020-07-20 13:35:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:05,991 INFO L225 Difference]: With dead ends: 107 [2020-07-20 13:35:05,991 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 13:35:05,993 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 [2020-07-20 13:35:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 13:35:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 13:35:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 13:35:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2020-07-20 13:35:06,002 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 163 [2020-07-20 13:35:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:06,002 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2020-07-20 13:35:06,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2020-07-20 13:35:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 13:35:06,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:06,005 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] [2020-07-20 13:35:06,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:06,220 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:06,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 4 times [2020-07-20 13:35:06,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:06,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518747622] [2020-07-20 13:35:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:06,361 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:06,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:06,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-07-20 13:35:06,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:06,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:06,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:06,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:06,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:07,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-07-20 13:35:07,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518747622] [2020-07-20 13:35:07,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:07,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:35:07,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889342379] [2020-07-20 13:35:07,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:07,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:07,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:07,085 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 13 states. [2020-07-20 13:35:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:07,274 INFO L93 Difference]: Finished difference Result 107 states and 179 transitions. [2020-07-20 13:35:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:07,277 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-07-20 13:35:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:07,279 INFO L225 Difference]: With dead ends: 107 [2020-07-20 13:35:07,279 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 13:35:07,280 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 [2020-07-20 13:35:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 13:35:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-07-20 13:35:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 13:35:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 136 transitions. [2020-07-20 13:35:07,291 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 136 transitions. Word has length 136 [2020-07-20 13:35:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:07,291 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 136 transitions. [2020-07-20 13:35:07,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 136 transitions. [2020-07-20 13:35:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-20 13:35:07,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:07,295 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] [2020-07-20 13:35:07,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:07,511 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1316077641, now seen corresponding path program 5 times [2020-07-20 13:35:07,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:07,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926422560] [2020-07-20 13:35:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:07,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:07,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:07,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:07,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 106 proven. 98 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-07-20 13:35:07,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:08,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 108 proven. 104 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-07-20 13:35:08,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926422560] [2020-07-20 13:35:08,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:08,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:35:08,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789219662] [2020-07-20 13:35:08,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:08,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:08,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:08,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:08,734 INFO L87 Difference]: Start difference. First operand 82 states and 136 transitions. Second operand 15 states. [2020-07-20 13:35:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:08,962 INFO L93 Difference]: Finished difference Result 117 states and 203 transitions. [2020-07-20 13:35:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:08,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-20 13:35:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:08,965 INFO L225 Difference]: With dead ends: 117 [2020-07-20 13:35:08,966 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 13:35:08,967 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 [2020-07-20 13:35:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 13:35:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-20 13:35:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 13:35:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-20 13:35:08,977 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 148 [2020-07-20 13:35:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:08,977 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-20 13:35:08,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-20 13:35:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 13:35:08,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:08,980 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] [2020-07-20 13:35:09,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:09,195 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash -872965087, now seen corresponding path program 6 times [2020-07-20 13:35:09,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:09,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696831002] [2020-07-20 13:35:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:09,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:09,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:09,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 81 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 13:35:09,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:09,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:09,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:09,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:09,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:09,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 85 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 13:35:10,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696831002] [2020-07-20 13:35:10,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:10,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:35:10,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451877276] [2020-07-20 13:35:10,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:10,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:10,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:10,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:10,150 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-20 13:35:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:10,365 INFO L93 Difference]: Finished difference Result 114 states and 190 transitions. [2020-07-20 13:35:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:10,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 149 [2020-07-20 13:35:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:10,369 INFO L225 Difference]: With dead ends: 114 [2020-07-20 13:35:10,369 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 13:35:10,371 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 [2020-07-20 13:35:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 13:35:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-07-20 13:35:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 13:35:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-20 13:35:10,383 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 149 [2020-07-20 13:35:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:10,387 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-20 13:35:10,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-20 13:35:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 13:35:10,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:10,389 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] [2020-07-20 13:35:10,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:10,605 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 7 times [2020-07-20 13:35:10,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:10,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946275376] [2020-07-20 13:35:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:10,745 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:10,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:10,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-07-20 13:35:10,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:11,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 143 proven. 37 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 13:35:11,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946275376] [2020-07-20 13:35:11,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:11,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:35:11,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108687406] [2020-07-20 13:35:11,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:11,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:11,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:11,511 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-20 13:35:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:11,675 INFO L93 Difference]: Finished difference Result 106 states and 183 transitions. [2020-07-20 13:35:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:11,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 150 [2020-07-20 13:35:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:11,678 INFO L225 Difference]: With dead ends: 106 [2020-07-20 13:35:11,678 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 13:35:11,680 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 [2020-07-20 13:35:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 13:35:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-07-20 13:35:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 13:35:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 161 transitions. [2020-07-20 13:35:11,694 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 161 transitions. Word has length 150 [2020-07-20 13:35:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:11,695 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 161 transitions. [2020-07-20 13:35:11,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 161 transitions. [2020-07-20 13:35:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-20 13:35:11,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:11,698 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] [2020-07-20 13:35:11,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:11,912 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:11,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1102006884, now seen corresponding path program 8 times [2020-07-20 13:35:11,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:11,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273151232] [2020-07-20 13:35:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:12,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:12,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:12,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:12,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 185 proven. 49 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-20 13:35:12,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:12,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 187 proven. 55 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2020-07-20 13:35:13,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273151232] [2020-07-20 13:35:13,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:13,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:35:13,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748824807] [2020-07-20 13:35:13,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:13,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:13,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:13,308 INFO L87 Difference]: Start difference. First operand 92 states and 161 transitions. Second operand 15 states. [2020-07-20 13:35:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:13,545 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-20 13:35:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:13,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 162 [2020-07-20 13:35:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:13,550 INFO L225 Difference]: With dead ends: 117 [2020-07-20 13:35:13,550 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 13:35:13,551 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 [2020-07-20 13:35:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 13:35:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-07-20 13:35:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 13:35:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 158 transitions. [2020-07-20 13:35:13,561 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 158 transitions. Word has length 162 [2020-07-20 13:35:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:13,562 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 158 transitions. [2020-07-20 13:35:13,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 158 transitions. [2020-07-20 13:35:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-20 13:35:13,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:13,565 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] [2020-07-20 13:35:13,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:13,780 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1920867700, now seen corresponding path program 9 times [2020-07-20 13:35:13,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:13,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765564806] [2020-07-20 13:35:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:13,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:13,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:13,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 37 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-07-20 13:35:14,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:14,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-20 13:35:14,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765564806] [2020-07-20 13:35:14,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:14,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:35:14,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821296810] [2020-07-20 13:35:14,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:14,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:14,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:14,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:14,819 INFO L87 Difference]: Start difference. First operand 96 states and 158 transitions. Second operand 13 states. [2020-07-20 13:35:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:15,012 INFO L93 Difference]: Finished difference Result 129 states and 217 transitions. [2020-07-20 13:35:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:15,016 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 163 [2020-07-20 13:35:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:15,018 INFO L225 Difference]: With dead ends: 129 [2020-07-20 13:35:15,018 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 13:35:15,020 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 [2020-07-20 13:35:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 13:35:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-07-20 13:35:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 13:35:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-20 13:35:15,036 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 163 [2020-07-20 13:35:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:15,036 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-20 13:35:15,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-20 13:35:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-20 13:35:15,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:15,039 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] [2020-07-20 13:35:15,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:15,254 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:15,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1607241826, now seen corresponding path program 10 times [2020-07-20 13:35:15,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:15,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835202345] [2020-07-20 13:35:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:15,416 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:15,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:15,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:35:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 32 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-20 13:35:15,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:15,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:15,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:15,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:15,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 34 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-07-20 13:35:16,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835202345] [2020-07-20 13:35:16,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:16,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:35:16,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029438311] [2020-07-20 13:35:16,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:35:16,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:35:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:35:16,091 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 11 states. [2020-07-20 13:35:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:16,227 INFO L93 Difference]: Finished difference Result 131 states and 225 transitions. [2020-07-20 13:35:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:35:16,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 164 [2020-07-20 13:35:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:16,230 INFO L225 Difference]: With dead ends: 131 [2020-07-20 13:35:16,230 INFO L226 Difference]: Without dead ends: 124 [2020-07-20 13:35:16,231 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 [2020-07-20 13:35:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-20 13:35:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-07-20 13:35:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 13:35:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 157 transitions. [2020-07-20 13:35:16,242 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 157 transitions. Word has length 164 [2020-07-20 13:35:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:16,242 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 157 transitions. [2020-07-20 13:35:16,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:35:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 157 transitions. [2020-07-20 13:35:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-20 13:35:16,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:16,245 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] [2020-07-20 13:35:16,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:16,459 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash -315995755, now seen corresponding path program 11 times [2020-07-20 13:35:16,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:16,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616818390] [2020-07-20 13:35:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:16,632 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:16,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:16,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 168 proven. 41 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2020-07-20 13:35:16,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:17,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 170 proven. 43 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-20 13:35:17,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616818390] [2020-07-20 13:35:17,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:17,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:35:17,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130472580] [2020-07-20 13:35:17,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:17,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:17,558 INFO L87 Difference]: Start difference. First operand 95 states and 157 transitions. Second operand 13 states. [2020-07-20 13:35:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:17,734 INFO L93 Difference]: Finished difference Result 110 states and 175 transitions. [2020-07-20 13:35:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:17,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 176 [2020-07-20 13:35:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:17,737 INFO L225 Difference]: With dead ends: 110 [2020-07-20 13:35:17,737 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 13:35:17,738 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 [2020-07-20 13:35:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 13:35:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-07-20 13:35:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 13:35:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-20 13:35:17,747 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 176 [2020-07-20 13:35:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:17,748 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-20 13:35:17,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-20 13:35:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-20 13:35:17,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:17,750 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] [2020-07-20 13:35:17,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:17,966 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 12 times [2020-07-20 13:35:17,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:17,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104197306] [2020-07-20 13:35:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:18,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:18,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:18,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 45 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-07-20 13:35:18,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:18,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:18,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:19,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:19,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:19,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:19,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 55 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-07-20 13:35:19,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104197306] [2020-07-20 13:35:19,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:19,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:35:19,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225474499] [2020-07-20 13:35:19,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:19,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:19,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:19,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:19,306 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 15 states. [2020-07-20 13:35:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:19,565 INFO L93 Difference]: Finished difference Result 123 states and 202 transitions. [2020-07-20 13:35:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:19,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2020-07-20 13:35:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:19,568 INFO L225 Difference]: With dead ends: 123 [2020-07-20 13:35:19,568 INFO L226 Difference]: Without dead ends: 116 [2020-07-20 13:35:19,569 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 [2020-07-20 13:35:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-20 13:35:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-07-20 13:35:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 13:35:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 173 transitions. [2020-07-20 13:35:19,588 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 173 transitions. Word has length 191 [2020-07-20 13:35:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:19,589 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 173 transitions. [2020-07-20 13:35:19,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 173 transitions. [2020-07-20 13:35:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-20 13:35:19,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:19,592 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] [2020-07-20 13:35:19,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:19,806 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:19,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:19,806 INFO L82 PathProgramCache]: Analyzing trace with hash -31808317, now seen corresponding path program 13 times [2020-07-20 13:35:19,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:19,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715951203] [2020-07-20 13:35:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:19,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:19,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:35:19,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 100 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-07-20 13:35:20,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:20,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:20,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 116 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-07-20 13:35:21,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715951203] [2020-07-20 13:35:21,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:21,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 13:35:21,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838606188] [2020-07-20 13:35:21,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:21,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:21,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:21,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:21,743 INFO L87 Difference]: Start difference. First operand 101 states and 173 transitions. Second operand 17 states. [2020-07-20 13:35:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:22,010 INFO L93 Difference]: Finished difference Result 121 states and 205 transitions. [2020-07-20 13:35:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:22,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 204 [2020-07-20 13:35:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:22,014 INFO L225 Difference]: With dead ends: 121 [2020-07-20 13:35:22,014 INFO L226 Difference]: Without dead ends: 114 [2020-07-20 13:35:22,016 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 [2020-07-20 13:35:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-20 13:35:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2020-07-20 13:35:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 13:35:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 161 transitions. [2020-07-20 13:35:22,026 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 161 transitions. Word has length 204 [2020-07-20 13:35:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:22,027 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 161 transitions. [2020-07-20 13:35:22,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 161 transitions. [2020-07-20 13:35:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-20 13:35:22,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:22,029 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] [2020-07-20 13:35:22,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:22,244 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 14 times [2020-07-20 13:35:22,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:22,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177618861] [2020-07-20 13:35:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:22,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:22,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-20 13:35:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-20 13:35:22,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-20 13:35:24,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177618861] [2020-07-20 13:35:24,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:24,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-20 13:35:24,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561966721] [2020-07-20 13:35:24,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 13:35:24,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:24,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 13:35:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 13:35:24,797 INFO L87 Difference]: Start difference. First operand 93 states and 161 transitions. Second operand 36 states. [2020-07-20 13:35:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:25,638 INFO L93 Difference]: Finished difference Result 226 states and 521 transitions. [2020-07-20 13:35:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 13:35:25,639 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-07-20 13:35:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:25,646 INFO L225 Difference]: With dead ends: 226 [2020-07-20 13:35:25,646 INFO L226 Difference]: Without dead ends: 219 [2020-07-20 13:35:25,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 13:35:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-20 13:35:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 145. [2020-07-20 13:35:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-20 13:35:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2020-07-20 13:35:25,687 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 177 [2020-07-20 13:35:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:25,688 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2020-07-20 13:35:25,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 13:35:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2020-07-20 13:35:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-20 13:35:25,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:25,694 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] [2020-07-20 13:35:25,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:25,908 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:25,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1104223868, now seen corresponding path program 15 times [2020-07-20 13:35:25,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:25,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160627735] [2020-07-20 13:35:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:26,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:26,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:35:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 104 proven. 204 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-20 13:35:26,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:27,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 104 proven. 212 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2020-07-20 13:35:27,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160627735] [2020-07-20 13:35:27,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:27,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 13:35:27,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845749987] [2020-07-20 13:35:27,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:27,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:27,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:27,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:27,615 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 17 states. [2020-07-20 13:35:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:27,931 INFO L93 Difference]: Finished difference Result 199 states and 481 transitions. [2020-07-20 13:35:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:27,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 191 [2020-07-20 13:35:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:27,936 INFO L225 Difference]: With dead ends: 199 [2020-07-20 13:35:27,936 INFO L226 Difference]: Without dead ends: 145 [2020-07-20 13:35:27,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 355 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:35:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-20 13:35:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-07-20 13:35:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-20 13:35:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 299 transitions. [2020-07-20 13:35:27,958 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 299 transitions. Word has length 191 [2020-07-20 13:35:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:27,958 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 299 transitions. [2020-07-20 13:35:27,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 299 transitions. [2020-07-20 13:35:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 13:35:27,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:27,963 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] [2020-07-20 13:35:28,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:28,176 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1843327003, now seen corresponding path program 16 times [2020-07-20 13:35:28,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:28,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814681138] [2020-07-20 13:35:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:28,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 185 proven. 32 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2020-07-20 13:35:28,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:28,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:28,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:28,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:29,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:29,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:29,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:29,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:29,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 185 proven. 39 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2020-07-20 13:35:29,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814681138] [2020-07-20 13:35:29,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:29,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:35:29,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046105274] [2020-07-20 13:35:29,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:29,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:29,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:29,279 INFO L87 Difference]: Start difference. First operand 145 states and 299 transitions. Second operand 13 states. [2020-07-20 13:35:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:29,453 INFO L93 Difference]: Finished difference Result 174 states and 357 transitions. [2020-07-20 13:35:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:29,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 178 [2020-07-20 13:35:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:29,457 INFO L225 Difference]: With dead ends: 174 [2020-07-20 13:35:29,458 INFO L226 Difference]: Without dead ends: 167 [2020-07-20 13:35:29,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 335 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-07-20 13:35:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 145. [2020-07-20 13:35:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-20 13:35:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 299 transitions. [2020-07-20 13:35:29,480 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 299 transitions. Word has length 178 [2020-07-20 13:35:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:29,481 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 299 transitions. [2020-07-20 13:35:29,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 299 transitions. [2020-07-20 13:35:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 13:35:29,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:29,485 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:29,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:29,700 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:29,700 INFO L82 PathProgramCache]: Analyzing trace with hash -916523095, now seen corresponding path program 17 times [2020-07-20 13:35:29,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:29,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039257754] [2020-07-20 13:35:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:29,898 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:29,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:29,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 131 proven. 135 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2020-07-20 13:35:29,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:30,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:30,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:30,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:30,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:30,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:30,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:30,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:30,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 131 proven. 147 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-20 13:35:31,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039257754] [2020-07-20 13:35:31,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:31,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:35:31,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15776629] [2020-07-20 13:35:31,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:31,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:31,123 INFO L87 Difference]: Start difference. First operand 145 states and 299 transitions. Second operand 15 states. [2020-07-20 13:35:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:31,462 INFO L93 Difference]: Finished difference Result 200 states and 443 transitions. [2020-07-20 13:35:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:31,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 178 [2020-07-20 13:35:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:31,466 INFO L225 Difference]: With dead ends: 200 [2020-07-20 13:35:31,466 INFO L226 Difference]: Without dead ends: 168 [2020-07-20 13:35:31,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 331 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:35:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-20 13:35:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 148. [2020-07-20 13:35:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 13:35:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 302 transitions. [2020-07-20 13:35:31,493 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 302 transitions. Word has length 178 [2020-07-20 13:35:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:31,494 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 302 transitions. [2020-07-20 13:35:31,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 302 transitions. [2020-07-20 13:35:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-07-20 13:35:31,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:31,500 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 11, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:31,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:31,713 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash -664244463, now seen corresponding path program 18 times [2020-07-20 13:35:31,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:31,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523715581] [2020-07-20 13:35:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:31,904 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:31,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:31,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:35:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 155 proven. 177 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-07-20 13:35:32,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:32,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:33,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:33,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:33,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:33,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:33,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 153 proven. 187 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2020-07-20 13:35:33,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523715581] [2020-07-20 13:35:33,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:33,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 13:35:33,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348209922] [2020-07-20 13:35:33,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:33,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:33,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:33,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:33,360 INFO L87 Difference]: Start difference. First operand 148 states and 302 transitions. Second operand 17 states. [2020-07-20 13:35:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:33,694 INFO L93 Difference]: Finished difference Result 186 states and 397 transitions. [2020-07-20 13:35:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:33,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 202 [2020-07-20 13:35:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:33,698 INFO L225 Difference]: With dead ends: 186 [2020-07-20 13:35:33,698 INFO L226 Difference]: Without dead ends: 154 [2020-07-20 13:35:33,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 377 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:35:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-20 13:35:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2020-07-20 13:35:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-20 13:35:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 293 transitions. [2020-07-20 13:35:33,719 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 293 transitions. Word has length 202 [2020-07-20 13:35:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:33,720 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 293 transitions. [2020-07-20 13:35:33,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:33,720 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 293 transitions. [2020-07-20 13:35:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 13:35:33,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:33,725 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] [2020-07-20 13:35:33,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:33,940 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash -140375518, now seen corresponding path program 19 times [2020-07-20 13:35:33,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:33,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881523081] [2020-07-20 13:35:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:34,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:34,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:35:34,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 211 proven. 43 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-20 13:35:34,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:34,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:34,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:34,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:34,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-20 13:35:35,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881523081] [2020-07-20 13:35:35,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:35,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 13:35:35,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664794704] [2020-07-20 13:35:35,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:35,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:35,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:35,283 INFO L87 Difference]: Start difference. First operand 143 states and 293 transitions. Second operand 15 states. [2020-07-20 13:35:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:35,495 INFO L93 Difference]: Finished difference Result 162 states and 313 transitions. [2020-07-20 13:35:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:35,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-20 13:35:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:35,497 INFO L225 Difference]: With dead ends: 162 [2020-07-20 13:35:35,497 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 13:35:35,499 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 [2020-07-20 13:35:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 13:35:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-07-20 13:35:35,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-20 13:35:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 280 transitions. [2020-07-20 13:35:35,516 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 280 transitions. Word has length 189 [2020-07-20 13:35:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:35,517 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 280 transitions. [2020-07-20 13:35:35,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 280 transitions. [2020-07-20 13:35:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 13:35:35,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:35,521 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] [2020-07-20 13:35:35,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:35,736 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:35,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:35,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1674908912, now seen corresponding path program 20 times [2020-07-20 13:35:35,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:35,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675373266] [2020-07-20 13:35:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:35,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:35,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:35,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:35:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 124 proven. 130 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-20 13:35:36,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:36,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:36,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:36,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:36,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:36,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 125 proven. 133 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-20 13:35:37,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675373266] [2020-07-20 13:35:37,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:37,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 13:35:37,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892919175] [2020-07-20 13:35:37,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:37,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:37,056 INFO L87 Difference]: Start difference. First operand 140 states and 280 transitions. Second operand 15 states. [2020-07-20 13:35:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:37,288 INFO L93 Difference]: Finished difference Result 192 states and 404 transitions. [2020-07-20 13:35:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:37,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-20 13:35:37,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:37,292 INFO L225 Difference]: With dead ends: 192 [2020-07-20 13:35:37,292 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 13:35:37,295 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 [2020-07-20 13:35:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 13:35:37,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2020-07-20 13:35:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-20 13:35:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 273 transitions. [2020-07-20 13:35:37,313 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 273 transitions. Word has length 189 [2020-07-20 13:35:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:37,313 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 273 transitions. [2020-07-20 13:35:37,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 273 transitions. [2020-07-20 13:35:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 13:35:37,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:37,318 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:37,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:37,534 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash -712647889, now seen corresponding path program 21 times [2020-07-20 13:35:37,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:37,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062246601] [2020-07-20 13:35:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:37,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:37,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 210 proven. 58 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-07-20 13:35:37,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:38,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 212 proven. 66 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-20 13:35:39,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062246601] [2020-07-20 13:35:39,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:39,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 13:35:39,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315469085] [2020-07-20 13:35:39,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:39,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:39,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:39,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:39,005 INFO L87 Difference]: Start difference. First operand 143 states and 273 transitions. Second operand 15 states. [2020-07-20 13:35:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:39,233 INFO L93 Difference]: Finished difference Result 179 states and 334 transitions. [2020-07-20 13:35:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:39,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 178 [2020-07-20 13:35:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:39,236 INFO L225 Difference]: With dead ends: 179 [2020-07-20 13:35:39,236 INFO L226 Difference]: Without dead ends: 172 [2020-07-20 13:35:39,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 331 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:35:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-20 13:35:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2020-07-20 13:35:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-20 13:35:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 273 transitions. [2020-07-20 13:35:39,257 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 273 transitions. Word has length 178 [2020-07-20 13:35:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:39,258 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 273 transitions. [2020-07-20 13:35:39,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 273 transitions. [2020-07-20 13:35:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 13:35:39,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:39,262 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] [2020-07-20 13:35:39,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:39,478 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:39,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1156996270, now seen corresponding path program 22 times [2020-07-20 13:35:39,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:39,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554499259] [2020-07-20 13:35:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:39,800 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:39,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:35:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 234 proven. 69 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-20 13:35:39,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:40,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 232 proven. 79 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-20 13:35:41,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554499259] [2020-07-20 13:35:41,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:41,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 13:35:41,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007513497] [2020-07-20 13:35:41,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:41,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:41,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:41,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:41,595 INFO L87 Difference]: Start difference. First operand 143 states and 273 transitions. Second operand 17 states. [2020-07-20 13:35:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:41,911 INFO L93 Difference]: Finished difference Result 177 states and 332 transitions. [2020-07-20 13:35:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:41,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-20 13:35:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:41,915 INFO L225 Difference]: With dead ends: 177 [2020-07-20 13:35:41,915 INFO L226 Difference]: Without dead ends: 170 [2020-07-20 13:35:41,917 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 [2020-07-20 13:35:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-20 13:35:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 133. [2020-07-20 13:35:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-20 13:35:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 242 transitions. [2020-07-20 13:35:41,933 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 242 transitions. Word has length 189 [2020-07-20 13:35:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:41,933 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 242 transitions. [2020-07-20 13:35:41,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 242 transitions. [2020-07-20 13:35:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 13:35:41,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:41,936 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] [2020-07-20 13:35:42,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:42,151 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1838391522, now seen corresponding path program 23 times [2020-07-20 13:35:42,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:42,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803339450] [2020-07-20 13:35:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:42,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:42,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:35:42,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 198 proven. 54 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-07-20 13:35:42,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:42,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:43,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:43,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:43,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:43,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:43,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 197 proven. 61 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-20 13:35:43,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803339450] [2020-07-20 13:35:43,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:43,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 13:35:43,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913759838] [2020-07-20 13:35:43,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:43,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:43,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:43,437 INFO L87 Difference]: Start difference. First operand 133 states and 242 transitions. Second operand 15 states. [2020-07-20 13:35:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:43,719 INFO L93 Difference]: Finished difference Result 162 states and 300 transitions. [2020-07-20 13:35:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:43,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-20 13:35:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:43,723 INFO L225 Difference]: With dead ends: 162 [2020-07-20 13:35:43,724 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 13:35:43,725 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 [2020-07-20 13:35:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 13:35:43,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 107. [2020-07-20 13:35:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 13:35:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 192 transitions. [2020-07-20 13:35:43,737 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 192 transitions. Word has length 189 [2020-07-20 13:35:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:43,738 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 192 transitions. [2020-07-20 13:35:43,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 192 transitions. [2020-07-20 13:35:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 13:35:43,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:43,740 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] [2020-07-20 13:35:43,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:43,956 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:43,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2096855727, now seen corresponding path program 24 times [2020-07-20 13:35:43,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:43,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235548394] [2020-07-20 13:35:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:44,208 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:44,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:35:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 69 proven. 239 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2020-07-20 13:35:44,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:45,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 73 proven. 251 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2020-07-20 13:35:45,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235548394] [2020-07-20 13:35:45,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:45,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 13:35:45,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418971636] [2020-07-20 13:35:45,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:45,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:46,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:46,000 INFO L87 Difference]: Start difference. First operand 107 states and 192 transitions. Second operand 17 states. [2020-07-20 13:35:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:46,336 INFO L93 Difference]: Finished difference Result 168 states and 323 transitions. [2020-07-20 13:35:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:46,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 178 [2020-07-20 13:35:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:46,339 INFO L225 Difference]: With dead ends: 168 [2020-07-20 13:35:46,339 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 13:35:46,342 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 [2020-07-20 13:35:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 13:35:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-20 13:35:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-20 13:35:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 148 transitions. [2020-07-20 13:35:46,353 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 148 transitions. Word has length 178 [2020-07-20 13:35:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:46,353 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 148 transitions. [2020-07-20 13:35:46,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 148 transitions. [2020-07-20 13:35:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 13:35:46,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:46,355 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] [2020-07-20 13:35:46,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:46,570 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:46,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1148569106, now seen corresponding path program 25 times [2020-07-20 13:35:46,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:46,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314820469] [2020-07-20 13:35:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:46,813 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:35:46,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 212 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-20 13:35:46,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:47,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:48,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:48,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:48,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:48,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:48,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:48,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 220 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-20 13:35:48,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314820469] [2020-07-20 13:35:48,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:48,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 13:35:48,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32089862] [2020-07-20 13:35:48,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:48,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:48,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:48,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:48,358 INFO L87 Difference]: Start difference. First operand 104 states and 148 transitions. Second operand 17 states. [2020-07-20 13:35:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:48,680 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-07-20 13:35:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:48,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-20 13:35:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:48,683 INFO L225 Difference]: With dead ends: 152 [2020-07-20 13:35:48,683 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 13:35:48,686 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 [2020-07-20 13:35:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 13:35:48,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-07-20 13:35:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 13:35:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-07-20 13:35:48,694 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 189 [2020-07-20 13:35:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:48,694 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-07-20 13:35:48,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-07-20 13:35:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 13:35:48,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:48,696 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] [2020-07-20 13:35:48,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:48,897 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1803358882, now seen corresponding path program 26 times [2020-07-20 13:35:48,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:48,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635332287] [2020-07-20 13:35:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:35:49,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:49,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:49,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:35:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 89 proven. 260 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2020-07-20 13:35:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:50,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:51,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:51,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:51,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:51,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:51,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:51,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 87 proven. 276 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-07-20 13:35:51,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635332287] [2020-07-20 13:35:51,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:51,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 13:35:51,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264045731] [2020-07-20 13:35:51,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 13:35:51,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:51,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 13:35:51,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:35:51,322 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 19 states. [2020-07-20 13:35:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:51,675 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-07-20 13:35:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:35:51,677 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 189 [2020-07-20 13:35:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:51,678 INFO L225 Difference]: With dead ends: 137 [2020-07-20 13:35:51,678 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:35:51,683 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 [2020-07-20 13:35:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:35:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:35:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:35:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:35:51,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2020-07-20 13:35:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:51,684 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:35:51,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 13:35:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:35:51,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:35:51,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:51,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:35:52,580 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 54 [2020-07-20 13:35:52,886 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 59 [2020-07-20 13:35:53,114 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 53 [2020-07-20 13:35:53,415 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:53,967 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:54,192 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 58 [2020-07-20 13:35:54,405 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:54,508 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 58 [2020-07-20 13:35:54,862 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:55,088 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 54 [2020-07-20 13:35:55,272 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 53 [2020-07-20 13:35:55,455 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:55,599 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:55,789 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 53 [2020-07-20 13:35:55,892 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 53 [2020-07-20 13:35:56,000 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 53 [2020-07-20 13:35:56,222 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:56,456 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:56,592 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 54 [2020-07-20 13:35:56,759 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 53 [2020-07-20 13:35:56,936 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 60 [2020-07-20 13:35:57,224 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:35:57,346 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-07-20 13:35:57,522 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 60 [2020-07-20 13:35:57,763 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 67 [2020-07-20 13:35:57,867 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-07-20 13:35:58,186 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:35:58,476 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:35:58,732 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 68 [2020-07-20 13:35:58,984 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 68 [2020-07-20 13:35:59,241 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 68 [2020-07-20 13:35:59,400 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 60 [2020-07-20 13:35:59,673 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:35:59,916 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 67 [2020-07-20 13:36:00,089 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 63 [2020-07-20 13:36:00,359 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 40 [2020-07-20 13:36:00,634 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:36:00,759 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-07-20 13:36:01,037 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:36:01,145 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-07-20 13:36:01,469 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:36:01,754 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:36:01,931 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 82 [2020-07-20 13:36:02,084 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 60 [2020-07-20 13:36:02,279 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 63 [2020-07-20 13:36:02,553 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:36:02,803 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 68 [2020-07-20 13:36:03,319 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 29 [2020-07-20 13:36:03,868 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 26 [2020-07-20 13:36:03,872 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:36:03,872 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:36:03,872 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:36:03,872 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:36:03,872 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:36:03,872 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:36:03,873 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 13:36:03,873 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 13:36:03,873 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 13:36:03,873 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 13:36:03,873 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 13:36:03,873 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 13:36:03,873 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2020-07-20 13:36:03,874 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 13:36:03,874 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 13:36:03,874 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 13:36:03,874 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|)) [2020-07-20 13:36:03,874 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 13:36:03,874 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= fibo2_~n |fibo2_#in~n|)) (.cse2 (= 1 |fibo2_#t~ret2|)) (.cse1 (<= |fibo2_#in~n| fibo2_~n))) (or (and .cse0 .cse1 (<= 4 |fibo2_#in~n|) (<= |fibo2_#in~n| 4) (= 2 |fibo2_#t~ret2|)) (and .cse0 (= 3 |fibo2_#t~ret2|) (<= 5 |fibo2_#in~n|) .cse1) (and .cse0 (<= 3 |fibo2_#in~n|) .cse2 .cse1 (<= |fibo2_#in~n| 3)) (and .cse0 .cse1 (<= 6 |fibo2_#in~n|)) (and .cse0 (<= |fibo2_#in~n| 2) .cse2 .cse1 (<= 2 |fibo2_#in~n|)))) [2020-07-20 13:36:03,874 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 13:36:03,874 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 13:36:03,875 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 13:36:03,875 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 13:36:03,875 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 13:36:03,875 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 13:36:03,875 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)) [2020-07-20 13:36:03,875 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 13:36:03,875 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)) [2020-07-20 13:36:03,875 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 13:36:03,875 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 13:36:03,875 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 13:36:03,875 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 13:36:03,876 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 13:36:03,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:36:03 BoogieIcfgContainer [2020-07-20 13:36:03,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:36:03,882 INFO L168 Benchmark]: Toolchain (without parser) took 82246.44 ms. Allocated memory was 142.1 MB in the beginning and 893.4 MB in the end (delta: 751.3 MB). Free memory was 100.0 MB in the beginning and 287.2 MB in the end (delta: -187.2 MB). Peak memory consumption was 742.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:36:03,883 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 142.1 MB. Free memory is still 117.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 13:36:03,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.00 ms. Allocated memory is still 142.1 MB. Free memory was 99.6 MB in the beginning and 90.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:36:03,883 INFO L168 Benchmark]: Boogie Preprocessor took 44.82 ms. Allocated memory is still 142.1 MB. Free memory was 90.1 MB in the beginning and 88.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:36:03,884 INFO L168 Benchmark]: RCFGBuilder took 542.34 ms. Allocated memory was 142.1 MB in the beginning and 199.8 MB in the end (delta: 57.7 MB). Free memory was 88.3 MB in the beginning and 165.4 MB in the end (delta: -77.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:36:03,884 INFO L168 Benchmark]: TraceAbstraction took 81288.92 ms. Allocated memory was 199.8 MB in the beginning and 893.4 MB in the end (delta: 693.6 MB). Free memory was 164.3 MB in the beginning and 287.2 MB in the end (delta: -122.8 MB). Peak memory consumption was 748.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:36:03,888 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 142.1 MB. Free memory is still 117.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.00 ms. Allocated memory is still 142.1 MB. Free memory was 99.6 MB in the beginning and 90.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.82 ms. Allocated memory is still 142.1 MB. Free memory was 90.1 MB in the beginning and 88.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 542.34 ms. Allocated memory was 142.1 MB in the beginning and 199.8 MB in the end (delta: 57.7 MB). Free memory was 88.3 MB in the beginning and 165.4 MB in the end (delta: -77.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 81288.92 ms. Allocated memory was 199.8 MB in the beginning and 893.4 MB in the end (delta: 693.6 MB). Free memory was 164.3 MB in the beginning and 287.2 MB in the end (delta: -122.8 MB). Peak memory consumption was 748.7 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: 69.1s, OverallIterations: 39, TraceHistogramMax: 18, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 11.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1150 SDtfs, 1407 SDslu, 8267 SDs, 0 SdLazy, 7386 SolverSat, 1070 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11130 GetRequests, 10112 SyntacticMatches, 353 SemanticMatches, 665 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=30, 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, 39 MinimizatonAttempts, 705 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 227 PreInvPairs, 5075 NumberOfFragments, 143 HoareAnnotationTreeSize, 227 FomulaSimplifications, 715151394 FormulaSimplificationTreeSizeReduction, 10.8s HoareSimplificationTime, 11 FomulaSimplificationsInter, 33025 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 43.2s InterpolantComputationTime, 5503 NumberOfCodeBlocks, 4965 NumberOfCodeBlocksAsserted, 136 NumberOfCheckSat, 10903 ConstructedInterpolants, 0 QuantifiedInterpolants, 2995494 SizeOfPredicates, 202 NumberOfNonLiveVariables, 11397 ConjunctsInSsa, 515 ConjunctsInUnsatCore, 76 InterpolantComputations, 2 PerfectInterpolantSequences, 38537/46420 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...