/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:23:38,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:23:38,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:23:38,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:23:38,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:23:38,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:23:38,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:23:38,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:23:38,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:23:38,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:23:38,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:23:38,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:23:38,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:23:38,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:23:38,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:23:38,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:23:38,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:23:38,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:23:38,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:23:38,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:23:38,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:23:38,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:23:38,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:23:38,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:23:38,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:23:38,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:23:38,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:23:38,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:23:38,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:23:38,162 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:23:38,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:23:38,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:23:38,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:23:38,168 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:23:38,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:23:38,169 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:23:38,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:23:38,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:23:38,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:23:38,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:23:38,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:23:38,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:23:38,170 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:23:38,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:23:38,171 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:23:38,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:23:38,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:23:38,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:23:38,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:23:38,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:23:38,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:23:38,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:23:38,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:23:38,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:23:38,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:23:38,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:38,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:23:38,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:23:38,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:23:38,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:23:38,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:23:38,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:23:38,599 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:23:38,600 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:23:38,601 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-21 13:23:38,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a4f44115/45abd6f2fdc141cca21a045e5e7fe27a/FLAG6981e6911 [2020-07-21 13:23:39,463 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:23:39,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-21 13:23:39,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a4f44115/45abd6f2fdc141cca21a045e5e7fe27a/FLAG6981e6911 [2020-07-21 13:23:39,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a4f44115/45abd6f2fdc141cca21a045e5e7fe27a [2020-07-21 13:23:39,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:23:39,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:23:39,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:23:39,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:23:39,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:23:39,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:23:39" (1/1) ... [2020-07-21 13:23:39,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@259d2f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:39, skipping insertion in model container [2020-07-21 13:23:39,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:23:39" (1/1) ... [2020-07-21 13:23:39,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:23:39,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:23:40,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:23:40,136 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:23:40,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:23:40,208 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:23:40,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40 WrapperNode [2020-07-21 13:23:40,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:23:40,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:23:40,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:23:40,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:23:40,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (1/1) ... [2020-07-21 13:23:40,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (1/1) ... [2020-07-21 13:23:40,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (1/1) ... [2020-07-21 13:23:40,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (1/1) ... [2020-07-21 13:23:40,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (1/1) ... [2020-07-21 13:23:40,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (1/1) ... [2020-07-21 13:23:40,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (1/1) ... [2020-07-21 13:23:40,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:23:40,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:23:40,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:23:40,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:23:40,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:23:40,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:23:40,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:23:40,622 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 13:23:40,622 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 13:23:40,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:23:40,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:23:40,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:23:40,625 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 13:23:40,625 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 13:23:40,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:23:40,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:23:40,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:23:40,946 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:23:40,947 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:23:40,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:23:40 BoogieIcfgContainer [2020-07-21 13:23:40,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:23:40,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:23:40,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:23:40,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:23:40,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:23:39" (1/3) ... [2020-07-21 13:23:40,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8af08f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:23:40, skipping insertion in model container [2020-07-21 13:23:40,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:23:40" (2/3) ... [2020-07-21 13:23:40,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8af08f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:23:40, skipping insertion in model container [2020-07-21 13:23:40,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:23:40" (3/3) ... [2020-07-21 13:23:40,971 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-07-21 13:23:40,990 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:23:41,003 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:23:41,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:23:41,075 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:23:41,075 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:23:41,076 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:23:41,076 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:23:41,076 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:23:41,076 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:23:41,077 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:23:41,077 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:23:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 13:23:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:23:41,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:41,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:41,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:41,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 13:23:41,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:41,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132313867] [2020-07-21 13:23:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:41,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:41,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:23:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:23:41,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:23:41,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132313867] [2020-07-21 13:23:41,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:23:41,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:23:41,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653871434] [2020-07-21 13:23:41,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:23:41,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:41,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:23:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:23:41,521 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 13:23:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:41,739 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 13:23:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:23:41,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 13:23:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:41,768 INFO L225 Difference]: With dead ends: 44 [2020-07-21 13:23:41,768 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 13:23:41,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:23:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 13:23:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 13:23:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:23:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 13:23:41,834 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 13:23:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:41,835 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 13:23:41,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:23:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 13:23:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:23:41,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:41,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:42,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:42,055 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 13:23:42,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:42,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107016459] [2020-07-21 13:23:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:42,095 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:42,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:42,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:23:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:23:42,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:23:42,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107016459] [2020-07-21 13:23:42,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:23:42,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:23:42,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135700509] [2020-07-21 13:23:42,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:23:42,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:23:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:23:42,161 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 13:23:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:42,273 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 13:23:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:23:42,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:23:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:42,277 INFO L225 Difference]: With dead ends: 36 [2020-07-21 13:23:42,277 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 13:23:42,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:23:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 13:23:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 13:23:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:23:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 13:23:42,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 13:23:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:42,293 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 13:23:42,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:23:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 13:23:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:23:42,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:42,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:42,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:42,511 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 13:23:42,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:42,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596274625] [2020-07-21 13:23:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:42,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:42,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:23:42,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:23:42,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:42,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:42,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:23:43,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596274625] [2020-07-21 13:23:43,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:43,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 13:23:43,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997783248] [2020-07-21 13:23:43,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:23:43,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:23:43,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:23:43,036 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 13:23:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:43,267 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 13:23:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:23:43,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 13:23:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:43,271 INFO L225 Difference]: With dead ends: 41 [2020-07-21 13:23:43,272 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 13:23:43,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:23:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 13:23:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 13:23:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:23:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 13:23:43,287 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 13:23:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:43,288 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 13:23:43,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:23:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 13:23:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:23:43,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:43,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:43,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:43,497 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 13:23:43,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:43,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142294256] [2020-07-21 13:23:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:43,563 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:43,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:43,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:23:43,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:23:43,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:43,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:43,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:23:44,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142294256] [2020-07-21 13:23:44,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:44,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 13:23:44,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185400816] [2020-07-21 13:23:44,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:23:44,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:23:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:23:44,061 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 13:23:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:44,321 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 13:23:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:23:44,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 13:23:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:44,325 INFO L225 Difference]: With dead ends: 46 [2020-07-21 13:23:44,326 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:23:44,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:23:44,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:23:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 13:23:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:23:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 13:23:44,360 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 13:23:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:44,361 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 13:23:44,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:23:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 13:23:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 13:23:44,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:44,364 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:44,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:44,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 13:23:44,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:44,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138051237] [2020-07-21 13:23:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:44,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:44,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:44,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:23:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 13:23:44,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:45,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:45,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:45,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 13:23:45,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138051237] [2020-07-21 13:23:45,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:45,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 13:23:45,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054867465] [2020-07-21 13:23:45,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 13:23:45,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 13:23:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:23:45,236 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 13:23:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:45,483 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 13:23:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:23:45,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 13:23:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:45,487 INFO L225 Difference]: With dead ends: 51 [2020-07-21 13:23:45,488 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 13:23:45,489 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 [2020-07-21 13:23:45,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 13:23:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 13:23:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:23:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 13:23:45,502 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 13:23:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:45,503 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 13:23:45,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 13:23:45,504 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 13:23:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 13:23:45,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:45,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:45,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:45,715 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:45,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 13:23:45,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:45,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173902264] [2020-07-21 13:23:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:45,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:45,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:45,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:23:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:23:45,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:46,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:46,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:46,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 13:23:46,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173902264] [2020-07-21 13:23:46,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:46,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 13:23:46,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016706123] [2020-07-21 13:23:46,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 13:23:46,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 13:23:46,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:23:46,251 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 13:23:46,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:46,505 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 13:23:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:23:46,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 13:23:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:46,512 INFO L225 Difference]: With dead ends: 56 [2020-07-21 13:23:46,512 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 13:23:46,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:23:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 13:23:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 13:23:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:23:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 13:23:46,552 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 13:23:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:46,553 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 13:23:46,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 13:23:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 13:23:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 13:23:46,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:46,564 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:46,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:46,779 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 13:23:46,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:46,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297227509] [2020-07-21 13:23:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:46,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:46,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:23:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 13:23:46,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:47,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:47,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:47,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:47,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 13:23:47,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297227509] [2020-07-21 13:23:47,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:47,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 13:23:47,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877492171] [2020-07-21 13:23:47,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 13:23:47,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 13:23:47,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:23:47,735 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 13:23:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:48,087 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 13:23:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:23:48,088 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 13:23:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:48,091 INFO L225 Difference]: With dead ends: 61 [2020-07-21 13:23:48,091 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 13:23:48,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:23:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 13:23:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 13:23:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:23:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 13:23:48,106 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 13:23:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:48,107 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 13:23:48,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 13:23:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 13:23:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 13:23:48,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:48,111 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:48,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:48,326 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:48,327 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 13:23:48,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:48,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105796347] [2020-07-21 13:23:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:48,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:48,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:48,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:23:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 13:23:48,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:48,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:48,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:49,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:49,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:49,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 13:23:49,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105796347] [2020-07-21 13:23:49,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:49,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 13:23:49,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689844063] [2020-07-21 13:23:49,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 13:23:49,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:49,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 13:23:49,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:23:49,188 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 13:23:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:49,488 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 13:23:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:23:49,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 13:23:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:49,492 INFO L225 Difference]: With dead ends: 66 [2020-07-21 13:23:49,493 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 13:23:49,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:23:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 13:23:49,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 13:23:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:23:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 13:23:49,517 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 13:23:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:49,517 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 13:23:49,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 13:23:49,518 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 13:23:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 13:23:49,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:49,521 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:49,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:49,736 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 13:23:49,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:49,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914725523] [2020-07-21 13:23:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:49,812 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:49,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:49,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:23:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 13:23:49,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:50,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:50,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:50,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:50,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:50,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:50,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:50,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 13:23:50,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914725523] [2020-07-21 13:23:50,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:50,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 13:23:50,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727210071] [2020-07-21 13:23:50,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 13:23:50,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 13:23:50,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 13:23:50,974 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 13:23:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:51,290 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 13:23:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:23:51,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 13:23:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:51,293 INFO L225 Difference]: With dead ends: 71 [2020-07-21 13:23:51,294 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 13:23:51,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:23:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 13:23:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 13:23:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 13:23:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 13:23:51,311 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 13:23:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:51,312 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 13:23:51,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 13:23:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 13:23:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 13:23:51,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:51,315 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:51,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:51,529 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 13:23:51,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:51,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100033751] [2020-07-21 13:23:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:51,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:51,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:23:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 13:23:51,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:52,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:52,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:52,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:52,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 13:23:52,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100033751] [2020-07-21 13:23:52,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:52,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 13:23:52,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304163284] [2020-07-21 13:23:52,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 13:23:52,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 13:23:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 13:23:52,600 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 13:23:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:52,830 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 13:23:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:23:52,831 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 13:23:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:52,833 INFO L225 Difference]: With dead ends: 76 [2020-07-21 13:23:52,833 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 13:23:52,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:23:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 13:23:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 13:23:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 13:23:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 13:23:52,859 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 13:23:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:52,860 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 13:23:52,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 13:23:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 13:23:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 13:23:52,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:52,863 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:53,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:53,066 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 13:23:53,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:53,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485729041] [2020-07-21 13:23:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:53,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:53,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:23:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 13:23:53,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:54,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:54,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:54,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:54,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:54,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:55,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:55,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:55,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 13:23:55,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485729041] [2020-07-21 13:23:55,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:55,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 13:23:55,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799819742] [2020-07-21 13:23:55,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 13:23:55,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:55,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 13:23:55,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:23:55,153 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 13:23:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:55,576 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 13:23:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:23:55,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 13:23:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:55,585 INFO L225 Difference]: With dead ends: 81 [2020-07-21 13:23:55,585 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 13:23:55,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 13:23:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 13:23:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 13:23:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 13:23:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 13:23:55,628 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 13:23:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:55,632 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 13:23:55,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 13:23:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 13:23:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 13:23:55,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:55,639 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:55,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:55,840 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 13:23:55,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:55,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160686739] [2020-07-21 13:23:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:55,945 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:55,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:55,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:23:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 13:23:56,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:57,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:57,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:57,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:57,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:57,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:57,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:57,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:23:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 13:23:57,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160686739] [2020-07-21 13:23:57,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:23:57,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 13:23:57,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512396705] [2020-07-21 13:23:57,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 13:23:57,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:23:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 13:23:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 13:23:57,844 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 13:23:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:23:58,283 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 13:23:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:23:58,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 13:23:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:23:58,287 INFO L225 Difference]: With dead ends: 86 [2020-07-21 13:23:58,288 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 13:23:58,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 13:23:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 13:23:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 13:23:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 13:23:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 13:23:58,302 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 13:23:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:23:58,303 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 13:23:58,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 13:23:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 13:23:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 13:23:58,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:23:58,307 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:23:58,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:58,523 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:23:58,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:23:58,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 13:23:58,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:23:58,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561242422] [2020-07-21 13:23:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:23:58,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:23:58,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:23:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:23:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 13:23:58,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:00,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:00,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:00,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 13:24:01,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561242422] [2020-07-21 13:24:01,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:01,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 13:24:01,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504724121] [2020-07-21 13:24:01,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 13:24:01,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 13:24:01,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:24:01,703 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 13:24:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:02,262 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 13:24:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:02,263 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 13:24:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:02,267 INFO L225 Difference]: With dead ends: 91 [2020-07-21 13:24:02,267 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 13:24:02,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:24:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 13:24:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 13:24:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 13:24:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 13:24:02,285 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 13:24:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:02,286 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 13:24:02,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 13:24:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 13:24:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 13:24:02,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:02,291 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:02,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:02,505 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 13:24:02,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:02,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022289918] [2020-07-21 13:24:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:02,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:02,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:24:02,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 13:24:02,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:04,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:05,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:05,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:05,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:05,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:06,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:06,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:06,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 13:24:06,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022289918] [2020-07-21 13:24:06,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:06,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:24:06,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391361686] [2020-07-21 13:24:06,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:24:06,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:24:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:24:06,222 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-21 13:24:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:06,770 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 13:24:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:06,771 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-21 13:24:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:06,775 INFO L225 Difference]: With dead ends: 96 [2020-07-21 13:24:06,775 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 13:24:06,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:24:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 13:24:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 13:24:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 13:24:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 13:24:06,790 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 13:24:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:06,791 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 13:24:06,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:24:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 13:24:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 13:24:06,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:06,799 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:07,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:07,014 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:07,015 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 13:24:07,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:07,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812040298] [2020-07-21 13:24:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:07,253 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:07,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:24:07,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 13:24:07,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:10,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:10,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:10,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:10,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:11,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:11,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:11,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:11,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:12,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:12,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:12,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 13:24:12,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812040298] [2020-07-21 13:24:12,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:12,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:24:12,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694396498] [2020-07-21 13:24:12,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:24:12,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:24:12,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:24:12,353 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-21 13:24:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:13,017 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 13:24:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:24:13,018 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-21 13:24:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:13,027 INFO L225 Difference]: With dead ends: 101 [2020-07-21 13:24:13,027 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 13:24:13,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:24:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 13:24:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 13:24:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 13:24:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 13:24:13,061 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 13:24:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:13,063 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 13:24:13,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:24:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 13:24:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-21 13:24:13,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:13,069 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:13,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:13,283 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-21 13:24:13,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:13,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294625709] [2020-07-21 13:24:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:13,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:13,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:13,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:24:13,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 13:24:13,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:15,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:15,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:16,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:16,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:16,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:16,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:17,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:17,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:17,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:17,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-21 13:24:17,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294625709] [2020-07-21 13:24:17,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:17,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:24:17,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764703745] [2020-07-21 13:24:17,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:24:17,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:17,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:24:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:24:17,835 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-21 13:24:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:18,396 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-21 13:24:18,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:18,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-21 13:24:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:18,403 INFO L225 Difference]: With dead ends: 129 [2020-07-21 13:24:18,404 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 13:24:18,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:24:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 13:24:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-21 13:24:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 13:24:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-21 13:24:18,433 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-21 13:24:18,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:18,437 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-21 13:24:18,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:24:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-21 13:24:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 13:24:18,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:18,442 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:18,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:18,657 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-21 13:24:18,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:18,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014978943] [2020-07-21 13:24:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:19,003 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:19,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:19,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 13:24:19,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:20,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:21,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:21,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:21,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:21,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:21,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-21 13:24:21,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014978943] [2020-07-21 13:24:21,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:21,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:24:21,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861638078] [2020-07-21 13:24:21,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:24:21,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:24:21,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:21,892 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-21 13:24:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:22,248 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-21 13:24:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:24:22,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 13:24:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:22,255 INFO L225 Difference]: With dead ends: 139 [2020-07-21 13:24:22,255 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 13:24:22,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 13:24:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-21 13:24:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 13:24:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-21 13:24:22,276 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-21 13:24:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:22,277 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-21 13:24:22,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:24:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-21 13:24:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-21 13:24:22,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:22,283 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:22,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:22,513 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-21 13:24:22,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:22,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319739792] [2020-07-21 13:24:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:22,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:22,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:22,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:24:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1216 refuted. 0 times theorem prover too weak. 6692 trivial. 0 not checked. [2020-07-21 13:24:23,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:25,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:26,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-21 13:24:27,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319739792] [2020-07-21 13:24:27,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:27,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:24:27,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341979255] [2020-07-21 13:24:27,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:24:27,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:24:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:24:27,947 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-21 13:24:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:28,514 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-21 13:24:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:24:28,515 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-21 13:24:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:28,519 INFO L225 Difference]: With dead ends: 166 [2020-07-21 13:24:28,519 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 13:24:28,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:24:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 13:24:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-21 13:24:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 13:24:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-21 13:24:28,537 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-21 13:24:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:28,537 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-21 13:24:28,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:24:28,538 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-21 13:24:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-21 13:24:28,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:28,544 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:28,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:28,759 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1214630406, now seen corresponding path program 2 times [2020-07-21 13:24:28,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:28,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602285740] [2020-07-21 13:24:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:29,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:29,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:29,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:24:29,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 884 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-21 13:24:29,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:31,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:31,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:31,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:32,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:32,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:32,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:32,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:32,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:32,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 905 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-21 13:24:32,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602285740] [2020-07-21 13:24:32,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:32,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:24:32,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611452532] [2020-07-21 13:24:32,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:24:32,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:24:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:24:32,617 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-21 13:24:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:33,030 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-21 13:24:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:33,031 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 458 [2020-07-21 13:24:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:33,038 INFO L225 Difference]: With dead ends: 167 [2020-07-21 13:24:33,039 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 13:24:33,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 883 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:24:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 13:24:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-21 13:24:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 13:24:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-21 13:24:33,057 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 458 [2020-07-21 13:24:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:33,058 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-21 13:24:33,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:24:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-21 13:24:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-07-21 13:24:33,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:33,063 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 24, 20, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:33,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:33,276 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:33,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash 605039004, now seen corresponding path program 3 times [2020-07-21 13:24:33,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:33,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240962704] [2020-07-21 13:24:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:33,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:33,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:24:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 290 proven. 753 refuted. 0 times theorem prover too weak. 3047 trivial. 0 not checked. [2020-07-21 13:24:33,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:36,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:36,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:36,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:36,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:37,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:38,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 292 proven. 784 refuted. 0 times theorem prover too weak. 3014 trivial. 0 not checked. [2020-07-21 13:24:38,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240962704] [2020-07-21 13:24:38,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:38,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:24:38,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804488162] [2020-07-21 13:24:38,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:24:38,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:38,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:24:38,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:24:38,185 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 21 states. [2020-07-21 13:24:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:38,834 INFO L93 Difference]: Finished difference Result 191 states and 508 transitions. [2020-07-21 13:24:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:24:38,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 381 [2020-07-21 13:24:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:38,838 INFO L225 Difference]: With dead ends: 191 [2020-07-21 13:24:38,839 INFO L226 Difference]: Without dead ends: 105 [2020-07-21 13:24:38,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 725 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:24:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-21 13:24:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-07-21 13:24:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 13:24:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 171 transitions. [2020-07-21 13:24:38,854 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 171 transitions. Word has length 381 [2020-07-21 13:24:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:38,855 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 171 transitions. [2020-07-21 13:24:38,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:24:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 171 transitions. [2020-07-21 13:24:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 13:24:38,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:38,860 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 27, 24, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:39,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:39,073 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash 878417150, now seen corresponding path program 4 times [2020-07-21 13:24:39,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:39,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46986657] [2020-07-21 13:24:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:39,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:39,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:39,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:39,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5403 backedges. 196 proven. 740 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2020-07-21 13:24:39,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:41,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:41,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5403 backedges. 196 proven. 756 refuted. 0 times theorem prover too weak. 4451 trivial. 0 not checked. [2020-07-21 13:24:42,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46986657] [2020-07-21 13:24:42,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:42,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:24:42,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89841871] [2020-07-21 13:24:42,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:24:42,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:42,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:24:42,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:42,296 INFO L87 Difference]: Start difference. First operand 99 states and 171 transitions. Second operand 17 states. [2020-07-21 13:24:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:42,630 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2020-07-21 13:24:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:24:42,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 436 [2020-07-21 13:24:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:42,635 INFO L225 Difference]: With dead ends: 178 [2020-07-21 13:24:42,635 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 13:24:42,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 843 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 13:24:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-07-21 13:24:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 13:24:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-21 13:24:42,653 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 436 [2020-07-21 13:24:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:42,654 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-21 13:24:42,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:24:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-21 13:24:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-07-21 13:24:42,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:42,658 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 22, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:42,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:42,873 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash -421949250, now seen corresponding path program 5 times [2020-07-21 13:24:42,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:42,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624114484] [2020-07-21 13:24:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:43,237 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:43,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:43,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:24:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5283 backedges. 221 proven. 829 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2020-07-21 13:24:43,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:45,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:45,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:46,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:46,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:46,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:46,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:46,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:46,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5283 backedges. 223 proven. 848 refuted. 0 times theorem prover too weak. 4212 trivial. 0 not checked. [2020-07-21 13:24:46,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624114484] [2020-07-21 13:24:46,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:46,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:24:46,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989010642] [2020-07-21 13:24:46,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:24:46,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:24:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:24:46,794 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-21 13:24:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:47,170 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-21 13:24:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:24:47,176 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 432 [2020-07-21 13:24:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:47,181 INFO L225 Difference]: With dead ends: 172 [2020-07-21 13:24:47,181 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 13:24:47,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 831 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:24:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 13:24:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-21 13:24:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 13:24:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 13:24:47,211 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 432 [2020-07-21 13:24:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:47,211 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 13:24:47,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:24:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 13:24:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2020-07-21 13:24:47,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:47,220 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 52, 52, 47, 37, 30, 30, 30, 30, 30, 30, 30, 26, 26, 26, 26, 26, 26, 26, 21, 15, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:47,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:47,435 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash 124224185, now seen corresponding path program 6 times [2020-07-21 13:24:47,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:47,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188542942] [2020-07-21 13:24:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:47,907 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:47,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1711 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17411 backedges. 346 proven. 1343 refuted. 0 times theorem prover too weak. 15722 trivial. 0 not checked. [2020-07-21 13:24:48,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:50,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:51,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:51,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:51,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:51,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:51,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:52,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:52,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17411 backedges. 346 proven. 1357 refuted. 0 times theorem prover too weak. 15708 trivial. 0 not checked. [2020-07-21 13:24:52,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188542942] [2020-07-21 13:24:52,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:52,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:24:52,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808150850] [2020-07-21 13:24:52,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:24:52,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:52,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:24:52,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:52,404 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 13:24:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:52,738 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-21 13:24:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:24:52,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 769 [2020-07-21 13:24:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:52,744 INFO L225 Difference]: With dead ends: 190 [2020-07-21 13:24:52,744 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 13:24:52,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1543 GetRequests, 1509 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 13:24:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-21 13:24:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 13:24:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 13:24:52,765 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 769 [2020-07-21 13:24:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:52,766 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 13:24:52,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:24:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 13:24:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-21 13:24:52,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:52,770 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 23, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:52,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:52,986 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:52,986 INFO L82 PathProgramCache]: Analyzing trace with hash -954190270, now seen corresponding path program 7 times [2020-07-21 13:24:52,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:52,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228874438] [2020-07-21 13:24:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:53,408 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:53,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:24:53,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 259 proven. 599 refuted. 0 times theorem prover too weak. 3774 trivial. 0 not checked. [2020-07-21 13:24:53,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:55,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:55,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:55,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:55,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:55,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:55,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:55,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:24:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 261 proven. 613 refuted. 0 times theorem prover too weak. 3758 trivial. 0 not checked. [2020-07-21 13:24:56,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228874438] [2020-07-21 13:24:56,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:24:56,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:24:56,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76241923] [2020-07-21 13:24:56,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:24:56,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:24:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:24:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:24:56,115 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 13:24:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:24:56,422 INFO L93 Difference]: Finished difference Result 156 states and 320 transitions. [2020-07-21 13:24:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:24:56,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 406 [2020-07-21 13:24:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:24:56,427 INFO L225 Difference]: With dead ends: 156 [2020-07-21 13:24:56,428 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 13:24:56,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 783 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:24:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 13:24:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-07-21 13:24:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 13:24:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 230 transitions. [2020-07-21 13:24:56,444 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 230 transitions. Word has length 406 [2020-07-21 13:24:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:24:56,445 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 230 transitions. [2020-07-21 13:24:56,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:24:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 230 transitions. [2020-07-21 13:24:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 13:24:56,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:24:56,451 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 27, 26, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 14, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:24:56,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:56,664 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:24:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:24:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1440475136, now seen corresponding path program 8 times [2020-07-21 13:24:56,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:24:56,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554506859] [2020-07-21 13:24:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:24:57,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:24:57,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:24:57,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:24:57,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:24:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 328 proven. 944 refuted. 0 times theorem prover too weak. 6232 trivial. 0 not checked. [2020-07-21 13:24:57,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:24:59,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:00,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 330 proven. 963 refuted. 0 times theorem prover too weak. 6211 trivial. 0 not checked. [2020-07-21 13:25:01,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554506859] [2020-07-21 13:25:01,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:01,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:25:01,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795090481] [2020-07-21 13:25:01,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:25:01,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:01,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:25:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:25:01,071 INFO L87 Difference]: Start difference. First operand 121 states and 230 transitions. Second operand 19 states. [2020-07-21 13:25:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:01,463 INFO L93 Difference]: Finished difference Result 159 states and 322 transitions. [2020-07-21 13:25:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:25:01,464 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 510 [2020-07-21 13:25:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:01,467 INFO L225 Difference]: With dead ends: 159 [2020-07-21 13:25:01,467 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 13:25:01,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:25:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 13:25:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 120. [2020-07-21 13:25:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-21 13:25:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 218 transitions. [2020-07-21 13:25:01,483 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 218 transitions. Word has length 510 [2020-07-21 13:25:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:01,483 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 218 transitions. [2020-07-21 13:25:01,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:25:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 218 transitions. [2020-07-21 13:25:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 13:25:01,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:01,489 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:01,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:01,703 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:01,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2126389129, now seen corresponding path program 9 times [2020-07-21 13:25:01,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:01,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208190978] [2020-07-21 13:25:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:02,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:02,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:25:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 294 proven. 639 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2020-07-21 13:25:02,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:03,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:03,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:04,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 294 proven. 655 refuted. 0 times theorem prover too weak. 4707 trivial. 0 not checked. [2020-07-21 13:25:05,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208190978] [2020-07-21 13:25:05,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:05,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:25:05,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038939356] [2020-07-21 13:25:05,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:25:05,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:05,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:25:05,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:05,167 INFO L87 Difference]: Start difference. First operand 120 states and 218 transitions. Second operand 17 states. [2020-07-21 13:25:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:05,451 INFO L93 Difference]: Finished difference Result 171 states and 354 transitions. [2020-07-21 13:25:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:25:05,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-21 13:25:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:05,455 INFO L225 Difference]: With dead ends: 171 [2020-07-21 13:25:05,456 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 13:25:05,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:25:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 13:25:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-07-21 13:25:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 13:25:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 206 transitions. [2020-07-21 13:25:05,471 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 206 transitions. Word has length 447 [2020-07-21 13:25:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:05,471 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 206 transitions. [2020-07-21 13:25:05,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:25:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 206 transitions. [2020-07-21 13:25:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-07-21 13:25:05,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:05,476 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 26, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 9, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:05,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:05,691 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:05,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:05,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2012799462, now seen corresponding path program 10 times [2020-07-21 13:25:05,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:05,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332999669] [2020-07-21 13:25:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:06,091 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:06,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:25:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4726 backedges. 249 proven. 478 refuted. 0 times theorem prover too weak. 3999 trivial. 0 not checked. [2020-07-21 13:25:06,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:07,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:07,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:07,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:07,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:07,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:07,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:07,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4726 backedges. 249 proven. 488 refuted. 0 times theorem prover too weak. 3989 trivial. 0 not checked. [2020-07-21 13:25:08,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332999669] [2020-07-21 13:25:08,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:08,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:25:08,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148675567] [2020-07-21 13:25:08,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:25:08,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:08,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:25:08,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:25:08,280 INFO L87 Difference]: Start difference. First operand 114 states and 206 transitions. Second operand 15 states. [2020-07-21 13:25:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:08,563 INFO L93 Difference]: Finished difference Result 196 states and 493 transitions. [2020-07-21 13:25:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:25:08,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 410 [2020-07-21 13:25:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:08,568 INFO L225 Difference]: With dead ends: 196 [2020-07-21 13:25:08,568 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 13:25:08,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 795 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:25:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 13:25:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 116. [2020-07-21 13:25:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 13:25:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 214 transitions. [2020-07-21 13:25:08,588 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 214 transitions. Word has length 410 [2020-07-21 13:25:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:08,589 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 214 transitions. [2020-07-21 13:25:08,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:25:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 214 transitions. [2020-07-21 13:25:08,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 13:25:08,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:08,594 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:08,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:08,807 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:08,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash -936471337, now seen corresponding path program 11 times [2020-07-21 13:25:08,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:08,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000690826] [2020-07-21 13:25:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:09,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:09,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:09,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:25:09,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 313 proven. 622 refuted. 0 times theorem prover too weak. 4721 trivial. 0 not checked. [2020-07-21 13:25:09,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:10,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:11,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 315 proven. 634 refuted. 0 times theorem prover too weak. 4707 trivial. 0 not checked. [2020-07-21 13:25:12,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000690826] [2020-07-21 13:25:12,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:12,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:25:12,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96854669] [2020-07-21 13:25:12,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:25:12,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:12,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:25:12,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:12,162 INFO L87 Difference]: Start difference. First operand 116 states and 214 transitions. Second operand 17 states. [2020-07-21 13:25:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:12,450 INFO L93 Difference]: Finished difference Result 149 states and 292 transitions. [2020-07-21 13:25:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:25:12,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-21 13:25:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:12,454 INFO L225 Difference]: With dead ends: 149 [2020-07-21 13:25:12,454 INFO L226 Difference]: Without dead ends: 140 [2020-07-21 13:25:12,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:25:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-21 13:25:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-07-21 13:25:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 13:25:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 206 transitions. [2020-07-21 13:25:12,469 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 206 transitions. Word has length 447 [2020-07-21 13:25:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:12,470 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 206 transitions. [2020-07-21 13:25:12,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:25:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 206 transitions. [2020-07-21 13:25:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 13:25:12,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:12,475 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 32, 32, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:12,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:12,690 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:12,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1736515675, now seen corresponding path program 12 times [2020-07-21 13:25:12,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:12,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367834677] [2020-07-21 13:25:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:13,093 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:13,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:25:13,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6469 backedges. 455 proven. 888 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2020-07-21 13:25:13,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:15,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:15,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:16,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:16,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:17,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6469 backedges. 457 proven. 919 refuted. 0 times theorem prover too weak. 5093 trivial. 0 not checked. [2020-07-21 13:25:18,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367834677] [2020-07-21 13:25:18,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:18,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:25:18,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83890057] [2020-07-21 13:25:18,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:25:18,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:18,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:25:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:25:18,190 INFO L87 Difference]: Start difference. First operand 114 states and 206 transitions. Second operand 21 states. [2020-07-21 13:25:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:18,769 INFO L93 Difference]: Finished difference Result 155 states and 300 transitions. [2020-07-21 13:25:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:25:18,770 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 476 [2020-07-21 13:25:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:18,773 INFO L225 Difference]: With dead ends: 155 [2020-07-21 13:25:18,773 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 13:25:18,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 915 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:25:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 13:25:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2020-07-21 13:25:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-21 13:25:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 215 transitions. [2020-07-21 13:25:18,788 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 215 transitions. Word has length 476 [2020-07-21 13:25:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:18,789 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 215 transitions. [2020-07-21 13:25:18,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:25:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 215 transitions. [2020-07-21 13:25:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-07-21 13:25:18,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:18,794 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 24, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:19,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:19,009 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -303933301, now seen corresponding path program 13 times [2020-07-21 13:25:19,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:19,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484605104] [2020-07-21 13:25:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:19,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:19,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:25:19,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 401 proven. 490 refuted. 0 times theorem prover too weak. 4068 trivial. 0 not checked. [2020-07-21 13:25:19,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:21,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:21,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 403 proven. 504 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2020-07-21 13:25:22,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484605104] [2020-07-21 13:25:22,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:22,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:25:22,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314438568] [2020-07-21 13:25:22,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:25:22,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:22,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:25:22,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:22,304 INFO L87 Difference]: Start difference. First operand 122 states and 215 transitions. Second operand 17 states. [2020-07-21 13:25:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:22,638 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2020-07-21 13:25:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:25:22,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 419 [2020-07-21 13:25:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:22,642 INFO L225 Difference]: With dead ends: 174 [2020-07-21 13:25:22,642 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 13:25:22,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 809 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:25:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 13:25:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2020-07-21 13:25:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 13:25:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 278 transitions. [2020-07-21 13:25:22,667 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 278 transitions. Word has length 419 [2020-07-21 13:25:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:22,668 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 278 transitions. [2020-07-21 13:25:22,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:25:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 278 transitions. [2020-07-21 13:25:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-21 13:25:22,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:22,676 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 28, 27, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 14, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:22,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:22,890 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:22,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1318222248, now seen corresponding path program 14 times [2020-07-21 13:25:22,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:22,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313027237] [2020-07-21 13:25:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:23,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:23,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:25:23,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7557 backedges. 676 proven. 779 refuted. 0 times theorem prover too weak. 6102 trivial. 0 not checked. [2020-07-21 13:25:23,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:26,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:26,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:26,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:27,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:28,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7557 backedges. 676 proven. 812 refuted. 0 times theorem prover too weak. 6069 trivial. 0 not checked. [2020-07-21 13:25:28,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313027237] [2020-07-21 13:25:28,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:28,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:25:28,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053296986] [2020-07-21 13:25:28,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:25:28,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:28,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:25:28,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:25:28,549 INFO L87 Difference]: Start difference. First operand 142 states and 278 transitions. Second operand 21 states. [2020-07-21 13:25:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:29,076 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2020-07-21 13:25:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:25:29,077 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 512 [2020-07-21 13:25:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:29,080 INFO L225 Difference]: With dead ends: 176 [2020-07-21 13:25:29,080 INFO L226 Difference]: Without dead ends: 158 [2020-07-21 13:25:29,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 987 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:25:29,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-21 13:25:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-07-21 13:25:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 13:25:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 290 transitions. [2020-07-21 13:25:29,098 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 290 transitions. Word has length 512 [2020-07-21 13:25:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:29,099 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 290 transitions. [2020-07-21 13:25:29,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:25:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 290 transitions. [2020-07-21 13:25:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-07-21 13:25:29,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:29,107 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 24, 23, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:29,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:29,322 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash 873192572, now seen corresponding path program 15 times [2020-07-21 13:25:29,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:29,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610881579] [2020-07-21 13:25:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:29,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:29,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:25:29,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 466 proven. 584 refuted. 0 times theorem prover too weak. 4231 trivial. 0 not checked. [2020-07-21 13:25:29,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:32,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:32,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:32,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:32,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:32,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:32,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:32,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:33,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:33,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:33,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:33,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:33,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 470 proven. 601 refuted. 0 times theorem prover too weak. 4210 trivial. 0 not checked. [2020-07-21 13:25:33,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610881579] [2020-07-21 13:25:33,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:33,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:25:33,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647384825] [2020-07-21 13:25:33,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:25:33,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:33,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:25:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:25:33,665 INFO L87 Difference]: Start difference. First operand 150 states and 290 transitions. Second operand 19 states. [2020-07-21 13:25:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:34,054 INFO L93 Difference]: Finished difference Result 203 states and 429 transitions. [2020-07-21 13:25:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:25:34,056 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 432 [2020-07-21 13:25:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:34,059 INFO L225 Difference]: With dead ends: 203 [2020-07-21 13:25:34,059 INFO L226 Difference]: Without dead ends: 194 [2020-07-21 13:25:34,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 831 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:25:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-21 13:25:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 146. [2020-07-21 13:25:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 13:25:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 273 transitions. [2020-07-21 13:25:34,077 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 273 transitions. Word has length 432 [2020-07-21 13:25:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:34,078 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 273 transitions. [2020-07-21 13:25:34,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:25:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 273 transitions. [2020-07-21 13:25:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 13:25:34,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:34,083 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 26, 23, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:34,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:34,298 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:34,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1349343847, now seen corresponding path program 16 times [2020-07-21 13:25:34,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:34,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211264178] [2020-07-21 13:25:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:34,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:34,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:34,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:25:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5018 backedges. 409 proven. 469 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-07-21 13:25:35,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:36,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:36,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:37,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:37,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:37,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:37,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:37,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:37,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5018 backedges. 411 proven. 481 refuted. 0 times theorem prover too weak. 4126 trivial. 0 not checked. [2020-07-21 13:25:37,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211264178] [2020-07-21 13:25:37,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:37,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:25:37,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113498478] [2020-07-21 13:25:37,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:25:37,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:37,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:25:37,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:25:37,954 INFO L87 Difference]: Start difference. First operand 146 states and 273 transitions. Second operand 17 states. [2020-07-21 13:25:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:38,331 INFO L93 Difference]: Finished difference Result 229 states and 503 transitions. [2020-07-21 13:25:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:25:38,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 422 [2020-07-21 13:25:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:38,336 INFO L225 Difference]: With dead ends: 229 [2020-07-21 13:25:38,336 INFO L226 Difference]: Without dead ends: 220 [2020-07-21 13:25:38,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 815 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:25:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-21 13:25:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 141. [2020-07-21 13:25:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-21 13:25:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 255 transitions. [2020-07-21 13:25:38,360 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 255 transitions. Word has length 422 [2020-07-21 13:25:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:38,361 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 255 transitions. [2020-07-21 13:25:38,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:25:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 255 transitions. [2020-07-21 13:25:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 13:25:38,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:38,401 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:38,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:38,602 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:38,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1538239137, now seen corresponding path program 17 times [2020-07-21 13:25:38,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:38,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852536595] [2020-07-21 13:25:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:39,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:39,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:39,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:25:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7277 backedges. 374 proven. 545 refuted. 0 times theorem prover too weak. 6358 trivial. 0 not checked. [2020-07-21 13:25:39,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:40,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:41,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7277 backedges. 374 proven. 557 refuted. 0 times theorem prover too weak. 6346 trivial. 0 not checked. [2020-07-21 13:25:42,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852536595] [2020-07-21 13:25:42,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:42,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:25:42,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073186814] [2020-07-21 13:25:42,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:25:42,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:42,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:25:42,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:25:42,079 INFO L87 Difference]: Start difference. First operand 141 states and 255 transitions. Second operand 15 states. [2020-07-21 13:25:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:42,339 INFO L93 Difference]: Finished difference Result 269 states and 678 transitions. [2020-07-21 13:25:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:25:42,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 504 [2020-07-21 13:25:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:42,345 INFO L225 Difference]: With dead ends: 269 [2020-07-21 13:25:42,345 INFO L226 Difference]: Without dead ends: 260 [2020-07-21 13:25:42,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 983 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:25:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-21 13:25:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 143. [2020-07-21 13:25:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-21 13:25:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 264 transitions. [2020-07-21 13:25:42,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 264 transitions. Word has length 504 [2020-07-21 13:25:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:42,370 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 264 transitions. [2020-07-21 13:25:42,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:25:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 264 transitions. [2020-07-21 13:25:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 13:25:42,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:42,375 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:42,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:42,589 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1443198022, now seen corresponding path program 18 times [2020-07-21 13:25:42,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:42,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263467639] [2020-07-21 13:25:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:43,116 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:43,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:43,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:25:43,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6090 backedges. 415 proven. 742 refuted. 0 times theorem prover too weak. 4933 trivial. 0 not checked. [2020-07-21 13:25:43,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:45,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:45,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:46,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:47,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6090 backedges. 419 proven. 762 refuted. 0 times theorem prover too weak. 4909 trivial. 0 not checked. [2020-07-21 13:25:47,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263467639] [2020-07-21 13:25:47,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:47,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:25:47,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037943462] [2020-07-21 13:25:47,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:25:47,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:25:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:25:47,311 INFO L87 Difference]: Start difference. First operand 143 states and 264 transitions. Second operand 19 states. [2020-07-21 13:25:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:47,821 INFO L93 Difference]: Finished difference Result 206 states and 415 transitions. [2020-07-21 13:25:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:25:47,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 463 [2020-07-21 13:25:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:47,825 INFO L225 Difference]: With dead ends: 206 [2020-07-21 13:25:47,825 INFO L226 Difference]: Without dead ends: 172 [2020-07-21 13:25:47,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 893 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:25:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-21 13:25:47,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2020-07-21 13:25:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 13:25:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 311 transitions. [2020-07-21 13:25:47,851 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 311 transitions. Word has length 463 [2020-07-21 13:25:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:47,852 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 311 transitions. [2020-07-21 13:25:47,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:25:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 311 transitions. [2020-07-21 13:25:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 13:25:47,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:47,860 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:48,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:48,075 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:48,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash 596219460, now seen corresponding path program 19 times [2020-07-21 13:25:48,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:48,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110492371] [2020-07-21 13:25:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:48,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:48,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:48,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:25:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6083 backedges. 577 proven. 569 refuted. 0 times theorem prover too weak. 4937 trivial. 0 not checked. [2020-07-21 13:25:48,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:51,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:51,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:51,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:51,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6083 backedges. 577 proven. 599 refuted. 0 times theorem prover too weak. 4907 trivial. 0 not checked. [2020-07-21 13:25:52,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110492371] [2020-07-21 13:25:52,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:52,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 13:25:52,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281847647] [2020-07-21 13:25:52,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 13:25:52,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:52,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 13:25:52,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:25:52,977 INFO L87 Difference]: Start difference. First operand 163 states and 311 transitions. Second operand 20 states. [2020-07-21 13:25:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:53,500 INFO L93 Difference]: Finished difference Result 290 states and 704 transitions. [2020-07-21 13:25:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:25:53,501 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 463 [2020-07-21 13:25:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:53,506 INFO L225 Difference]: With dead ends: 290 [2020-07-21 13:25:53,506 INFO L226 Difference]: Without dead ends: 272 [2020-07-21 13:25:53,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 893 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:25:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-21 13:25:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 177. [2020-07-21 13:25:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-21 13:25:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 368 transitions. [2020-07-21 13:25:53,532 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 368 transitions. Word has length 463 [2020-07-21 13:25:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:53,533 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 368 transitions. [2020-07-21 13:25:53,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 13:25:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 368 transitions. [2020-07-21 13:25:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-07-21 13:25:53,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:53,539 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 24, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:53,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:53,753 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash -18148365, now seen corresponding path program 20 times [2020-07-21 13:25:53,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:53,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422131251] [2020-07-21 13:25:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:54,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:25:54,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:25:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:25:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:25:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4992 backedges. 561 proven. 471 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2020-07-21 13:25:54,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:25:56,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:56,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:57,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:25:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4992 backedges. 561 proven. 497 refuted. 0 times theorem prover too weak. 3934 trivial. 0 not checked. [2020-07-21 13:25:58,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422131251] [2020-07-21 13:25:58,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:25:58,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:25:58,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667349369] [2020-07-21 13:25:58,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:25:58,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:25:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:25:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:25:58,731 INFO L87 Difference]: Start difference. First operand 177 states and 368 transitions. Second operand 19 states. [2020-07-21 13:25:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:25:59,203 INFO L93 Difference]: Finished difference Result 241 states and 546 transitions. [2020-07-21 13:25:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:25:59,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 421 [2020-07-21 13:25:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:25:59,207 INFO L225 Difference]: With dead ends: 241 [2020-07-21 13:25:59,207 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 13:25:59,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 809 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:25:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 13:25:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 154. [2020-07-21 13:25:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 13:25:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 302 transitions. [2020-07-21 13:25:59,226 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 302 transitions. Word has length 421 [2020-07-21 13:25:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:25:59,227 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 302 transitions. [2020-07-21 13:25:59,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:25:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 302 transitions. [2020-07-21 13:25:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 13:25:59,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:25:59,231 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 23, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:25:59,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:25:59,446 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:25:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:25:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1757427268, now seen corresponding path program 21 times [2020-07-21 13:25:59,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:25:59,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939909305] [2020-07-21 13:25:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:00,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:00,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:00,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:26:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4654 backedges. 425 proven. 416 refuted. 0 times theorem prover too weak. 3813 trivial. 0 not checked. [2020-07-21 13:26:00,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:02,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:02,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4654 backedges. 425 proven. 432 refuted. 0 times theorem prover too weak. 3797 trivial. 0 not checked. [2020-07-21 13:26:03,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939909305] [2020-07-21 13:26:03,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:03,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:26:03,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923575167] [2020-07-21 13:26:03,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:26:03,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:03,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:26:03,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:26:03,474 INFO L87 Difference]: Start difference. First operand 154 states and 302 transitions. Second operand 17 states. [2020-07-21 13:26:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:03,850 INFO L93 Difference]: Finished difference Result 214 states and 460 transitions. [2020-07-21 13:26:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:26:03,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 407 [2020-07-21 13:26:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:03,854 INFO L225 Difference]: With dead ends: 214 [2020-07-21 13:26:03,854 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 13:26:03,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 785 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:26:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 13:26:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 149. [2020-07-21 13:26:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 13:26:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 284 transitions. [2020-07-21 13:26:03,875 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 284 transitions. Word has length 407 [2020-07-21 13:26:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:03,876 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 284 transitions. [2020-07-21 13:26:03,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:26:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 284 transitions. [2020-07-21 13:26:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-21 13:26:03,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:03,880 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 23, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:04,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:04,095 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1786178241, now seen corresponding path program 22 times [2020-07-21 13:26:04,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:04,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690714656] [2020-07-21 13:26:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:04,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:04,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:26:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 395 proven. 303 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 13:26:04,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:06,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:06,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:06,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:06,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:06,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:06,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:06,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 397 proven. 311 refuted. 0 times theorem prover too weak. 3662 trivial. 0 not checked. [2020-07-21 13:26:07,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690714656] [2020-07-21 13:26:07,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:07,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:26:07,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63592841] [2020-07-21 13:26:07,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:26:07,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:07,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:26:07,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:26:07,396 INFO L87 Difference]: Start difference. First operand 149 states and 284 transitions. Second operand 15 states. [2020-07-21 13:26:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:07,692 INFO L93 Difference]: Finished difference Result 240 states and 536 transitions. [2020-07-21 13:26:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:26:07,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 395 [2020-07-21 13:26:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:07,697 INFO L225 Difference]: With dead ends: 240 [2020-07-21 13:26:07,697 INFO L226 Difference]: Without dead ends: 231 [2020-07-21 13:26:07,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 765 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:26:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-07-21 13:26:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-07-21 13:26:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-21 13:26:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 325 transitions. [2020-07-21 13:26:07,718 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 325 transitions. Word has length 395 [2020-07-21 13:26:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:07,719 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 325 transitions. [2020-07-21 13:26:07,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:26:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 325 transitions. [2020-07-21 13:26:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-21 13:26:07,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:07,724 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 30, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:07,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:07,938 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1555011257, now seen corresponding path program 23 times [2020-07-21 13:26:07,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:07,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143195424] [2020-07-21 13:26:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:08,541 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:08,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:26:08,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 405 proven. 481 refuted. 0 times theorem prover too weak. 6335 trivial. 0 not checked. [2020-07-21 13:26:08,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:10,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:10,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:10,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:11,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:11,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:11,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:11,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:11,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:11,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 405 proven. 491 refuted. 0 times theorem prover too weak. 6325 trivial. 0 not checked. [2020-07-21 13:26:11,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143195424] [2020-07-21 13:26:11,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:11,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:26:11,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520013468] [2020-07-21 13:26:11,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:26:11,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:26:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:26:11,915 INFO L87 Difference]: Start difference. First operand 159 states and 325 transitions. Second operand 15 states. [2020-07-21 13:26:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:12,247 INFO L93 Difference]: Finished difference Result 249 states and 585 transitions. [2020-07-21 13:26:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:26:12,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 503 [2020-07-21 13:26:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:12,252 INFO L225 Difference]: With dead ends: 249 [2020-07-21 13:26:12,252 INFO L226 Difference]: Without dead ends: 240 [2020-07-21 13:26:12,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 981 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:26:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-21 13:26:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 159. [2020-07-21 13:26:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-21 13:26:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 325 transitions. [2020-07-21 13:26:12,274 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 325 transitions. Word has length 503 [2020-07-21 13:26:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:12,274 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 325 transitions. [2020-07-21 13:26:12,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:26:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 325 transitions. [2020-07-21 13:26:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2020-07-21 13:26:12,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:12,281 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 41, 41, 33, 32, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 13, 11, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:12,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:12,494 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -282934423, now seen corresponding path program 24 times [2020-07-21 13:26:12,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:12,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076858890] [2020-07-21 13:26:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:13,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:13,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:26:13,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9772 backedges. 668 proven. 815 refuted. 0 times theorem prover too weak. 8289 trivial. 0 not checked. [2020-07-21 13:26:13,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:16,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:17,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:17,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:17,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:17,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:17,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:17,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:17,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:18,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9772 backedges. 670 proven. 837 refuted. 0 times theorem prover too weak. 8265 trivial. 0 not checked. [2020-07-21 13:26:18,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076858890] [2020-07-21 13:26:18,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:18,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:26:18,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793652821] [2020-07-21 13:26:18,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:26:18,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:18,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:26:18,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:26:18,736 INFO L87 Difference]: Start difference. First operand 159 states and 325 transitions. Second operand 19 states. [2020-07-21 13:26:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:19,292 INFO L93 Difference]: Finished difference Result 199 states and 412 transitions. [2020-07-21 13:26:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:26:19,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 582 [2020-07-21 13:26:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:19,296 INFO L225 Difference]: With dead ends: 199 [2020-07-21 13:26:19,296 INFO L226 Difference]: Without dead ends: 181 [2020-07-21 13:26:19,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1170 GetRequests, 1131 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:26:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-07-21 13:26:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2020-07-21 13:26:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-07-21 13:26:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 357 transitions. [2020-07-21 13:26:19,313 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 357 transitions. Word has length 582 [2020-07-21 13:26:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:19,314 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 357 transitions. [2020-07-21 13:26:19,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:26:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 357 transitions. [2020-07-21 13:26:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-21 13:26:19,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:19,317 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 24, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 9, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:19,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:19,518 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:19,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1168376325, now seen corresponding path program 25 times [2020-07-21 13:26:19,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:19,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934731062] [2020-07-21 13:26:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:20,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:20,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:26:20,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 498 proven. 378 refuted. 0 times theorem prover too weak. 4105 trivial. 0 not checked. [2020-07-21 13:26:20,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:22,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:22,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:22,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:22,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:22,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:23,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:23,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:23,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:23,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 502 proven. 388 refuted. 0 times theorem prover too weak. 4091 trivial. 0 not checked. [2020-07-21 13:26:24,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934731062] [2020-07-21 13:26:24,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:24,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:26:24,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901570331] [2020-07-21 13:26:24,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:26:24,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:24,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:26:24,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:26:24,106 INFO L87 Difference]: Start difference. First operand 169 states and 357 transitions. Second operand 17 states. [2020-07-21 13:26:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:24,522 INFO L93 Difference]: Finished difference Result 211 states and 447 transitions. [2020-07-21 13:26:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:26:24,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 420 [2020-07-21 13:26:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:24,528 INFO L225 Difference]: With dead ends: 211 [2020-07-21 13:26:24,528 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 13:26:24,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 811 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:26:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 13:26:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2020-07-21 13:26:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 13:26:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 308 transitions. [2020-07-21 13:26:24,548 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 308 transitions. Word has length 420 [2020-07-21 13:26:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:24,549 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 308 transitions. [2020-07-21 13:26:24,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:26:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 308 transitions. [2020-07-21 13:26:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 13:26:24,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:24,554 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:24,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:24,755 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:24,756 INFO L82 PathProgramCache]: Analyzing trace with hash -304990494, now seen corresponding path program 26 times [2020-07-21 13:26:24,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:24,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12630924] [2020-07-21 13:26:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:25,453 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:25,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:25,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:26:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 677 proven. 252 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2020-07-21 13:26:25,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:27,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:27,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:27,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:28,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:28,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:28,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:28,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:28,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:28,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 681 proven. 264 refuted. 0 times theorem prover too weak. 4399 trivial. 0 not checked. [2020-07-21 13:26:29,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12630924] [2020-07-21 13:26:29,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:29,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:26:29,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124542344] [2020-07-21 13:26:29,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:26:29,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:29,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:26:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:26:29,712 INFO L87 Difference]: Start difference. First operand 156 states and 308 transitions. Second operand 17 states. [2020-07-21 13:26:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:30,164 INFO L93 Difference]: Finished difference Result 243 states and 586 transitions. [2020-07-21 13:26:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:26:30,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 435 [2020-07-21 13:26:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:30,172 INFO L225 Difference]: With dead ends: 243 [2020-07-21 13:26:30,172 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 13:26:30,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 841 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:26:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 13:26:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 194. [2020-07-21 13:26:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-21 13:26:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 433 transitions. [2020-07-21 13:26:30,197 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 433 transitions. Word has length 435 [2020-07-21 13:26:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:30,198 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 433 transitions. [2020-07-21 13:26:30,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:26:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 433 transitions. [2020-07-21 13:26:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 13:26:30,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:30,206 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 23, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:30,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:30,420 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -142621718, now seen corresponding path program 27 times [2020-07-21 13:26:30,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:30,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151580457] [2020-07-21 13:26:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:31,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:31,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:26:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 761 proven. 220 refuted. 0 times theorem prover too weak. 3681 trivial. 0 not checked. [2020-07-21 13:26:31,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:33,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:33,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:34,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:34,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:34,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:34,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:34,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:34,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 765 proven. 237 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2020-07-21 13:26:35,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151580457] [2020-07-21 13:26:35,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:35,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:26:35,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814598618] [2020-07-21 13:26:35,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:26:35,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:26:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:26:35,566 INFO L87 Difference]: Start difference. First operand 194 states and 433 transitions. Second operand 19 states. [2020-07-21 13:26:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:36,044 INFO L93 Difference]: Finished difference Result 255 states and 621 transitions. [2020-07-21 13:26:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:26:36,045 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 407 [2020-07-21 13:26:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:36,050 INFO L225 Difference]: With dead ends: 255 [2020-07-21 13:26:36,050 INFO L226 Difference]: Without dead ends: 240 [2020-07-21 13:26:36,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 781 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:26:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-21 13:26:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 192. [2020-07-21 13:26:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-21 13:26:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 399 transitions. [2020-07-21 13:26:36,073 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 399 transitions. Word has length 407 [2020-07-21 13:26:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:36,074 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 399 transitions. [2020-07-21 13:26:36,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:26:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 399 transitions. [2020-07-21 13:26:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 13:26:36,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:36,080 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:36,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:36,280 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash -564186713, now seen corresponding path program 28 times [2020-07-21 13:26:36,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:36,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618261386] [2020-07-21 13:26:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:37,023 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:37,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:37,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:26:37,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 675 proven. 261 refuted. 0 times theorem prover too weak. 4745 trivial. 0 not checked. [2020-07-21 13:26:37,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:38,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:39,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 677 proven. 275 refuted. 0 times theorem prover too weak. 4729 trivial. 0 not checked. [2020-07-21 13:26:40,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618261386] [2020-07-21 13:26:40,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:40,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:26:40,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120883394] [2020-07-21 13:26:40,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:26:40,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:26:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:26:40,746 INFO L87 Difference]: Start difference. First operand 192 states and 399 transitions. Second operand 17 states. [2020-07-21 13:26:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:41,107 INFO L93 Difference]: Finished difference Result 306 states and 757 transitions. [2020-07-21 13:26:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:26:41,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 448 [2020-07-21 13:26:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:41,115 INFO L225 Difference]: With dead ends: 306 [2020-07-21 13:26:41,116 INFO L226 Difference]: Without dead ends: 291 [2020-07-21 13:26:41,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:26:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-07-21 13:26:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 187. [2020-07-21 13:26:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-21 13:26:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 375 transitions. [2020-07-21 13:26:41,152 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 375 transitions. Word has length 448 [2020-07-21 13:26:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:41,153 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 375 transitions. [2020-07-21 13:26:41,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:26:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 375 transitions. [2020-07-21 13:26:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 13:26:41,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:41,160 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:41,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:41,374 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:41,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1109313246, now seen corresponding path program 29 times [2020-07-21 13:26:41,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:41,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138973174] [2020-07-21 13:26:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:42,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:42,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:26:42,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 606 proven. 277 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2020-07-21 13:26:42,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:43,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:43,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:43,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:44,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:44,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:44,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:44,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:44,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 608 proven. 285 refuted. 0 times theorem prover too weak. 5947 trivial. 0 not checked. [2020-07-21 13:26:45,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138973174] [2020-07-21 13:26:45,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:45,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:26:45,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075953752] [2020-07-21 13:26:45,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:26:45,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:45,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:26:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:26:45,186 INFO L87 Difference]: Start difference. First operand 187 states and 375 transitions. Second operand 15 states. [2020-07-21 13:26:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:45,484 INFO L93 Difference]: Finished difference Result 331 states and 885 transitions. [2020-07-21 13:26:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:26:45,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 490 [2020-07-21 13:26:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:45,491 INFO L225 Difference]: With dead ends: 331 [2020-07-21 13:26:45,491 INFO L226 Difference]: Without dead ends: 316 [2020-07-21 13:26:45,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 955 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:26:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-07-21 13:26:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 189. [2020-07-21 13:26:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 13:26:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 388 transitions. [2020-07-21 13:26:45,516 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 388 transitions. Word has length 490 [2020-07-21 13:26:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:45,517 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 388 transitions. [2020-07-21 13:26:45,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:26:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 388 transitions. [2020-07-21 13:26:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-21 13:26:45,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:45,524 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 34, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 14, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:45,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:45,739 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:45,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2122481566, now seen corresponding path program 30 times [2020-07-21 13:26:45,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:45,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091596804] [2020-07-21 13:26:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:46,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:46,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:26:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1038 proven. 625 refuted. 0 times theorem prover too weak. 7750 trivial. 0 not checked. [2020-07-21 13:26:46,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:49,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:50,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:50,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:51,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:51,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:51,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:51,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:51,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1038 proven. 658 refuted. 0 times theorem prover too weak. 7717 trivial. 0 not checked. [2020-07-21 13:26:52,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091596804] [2020-07-21 13:26:52,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:52,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 13:26:52,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080230648] [2020-07-21 13:26:52,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:26:52,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:26:52,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:26:52,745 INFO L87 Difference]: Start difference. First operand 189 states and 388 transitions. Second operand 21 states. [2020-07-21 13:26:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:53,377 INFO L93 Difference]: Finished difference Result 254 states and 516 transitions. [2020-07-21 13:26:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:26:53,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 572 [2020-07-21 13:26:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:53,383 INFO L225 Difference]: With dead ends: 254 [2020-07-21 13:26:53,383 INFO L226 Difference]: Without dead ends: 239 [2020-07-21 13:26:53,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 1107 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:26:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-21 13:26:53,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 179. [2020-07-21 13:26:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-21 13:26:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 354 transitions. [2020-07-21 13:26:53,400 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 354 transitions. Word has length 572 [2020-07-21 13:26:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:53,401 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 354 transitions. [2020-07-21 13:26:53,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:26:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 354 transitions. [2020-07-21 13:26:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 13:26:53,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:53,405 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:53,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:53,606 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:53,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1103192002, now seen corresponding path program 31 times [2020-07-21 13:26:53,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:53,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609677425] [2020-07-21 13:26:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:54,295 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:26:54,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:26:54,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:26:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:26:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 869 proven. 208 refuted. 0 times theorem prover too weak. 4275 trivial. 0 not checked. [2020-07-21 13:26:54,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:26:56,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:56,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:56,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:56,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:57,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:58,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:26:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 871 proven. 230 refuted. 0 times theorem prover too weak. 4251 trivial. 0 not checked. [2020-07-21 13:26:58,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609677425] [2020-07-21 13:26:58,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:26:58,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:26:58,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283089963] [2020-07-21 13:26:58,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:26:58,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:26:58,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:26:58,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:26:58,985 INFO L87 Difference]: Start difference. First operand 179 states and 354 transitions. Second operand 19 states. [2020-07-21 13:26:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:26:59,495 INFO L93 Difference]: Finished difference Result 228 states and 448 transitions. [2020-07-21 13:26:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:26:59,495 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 435 [2020-07-21 13:26:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:26:59,499 INFO L225 Difference]: With dead ends: 228 [2020-07-21 13:26:59,499 INFO L226 Difference]: Without dead ends: 213 [2020-07-21 13:26:59,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 837 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:26:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-07-21 13:26:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 171. [2020-07-21 13:26:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-21 13:26:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2020-07-21 13:26:59,520 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 435 [2020-07-21 13:26:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:26:59,521 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2020-07-21 13:26:59,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:26:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2020-07-21 13:26:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:26:59,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:26:59,528 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:26:59,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:26:59,742 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:26:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:26:59,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1237054921, now seen corresponding path program 32 times [2020-07-21 13:26:59,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:26:59,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956957639] [2020-07-21 13:26:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:00,457 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:00,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:27:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6427 backedges. 745 proven. 257 refuted. 0 times theorem prover too weak. 5425 trivial. 0 not checked. [2020-07-21 13:27:00,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:02,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:02,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:02,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:03,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:03,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:03,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:03,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:03,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6427 backedges. 749 proven. 269 refuted. 0 times theorem prover too weak. 5409 trivial. 0 not checked. [2020-07-21 13:27:04,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956957639] [2020-07-21 13:27:04,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:04,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:27:04,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798365051] [2020-07-21 13:27:04,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:27:04,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:27:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:27:04,639 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand 17 states. [2020-07-21 13:27:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:05,057 INFO L93 Difference]: Finished difference Result 205 states and 400 transitions. [2020-07-21 13:27:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:27:05,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 13:27:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:05,061 INFO L225 Difference]: With dead ends: 205 [2020-07-21 13:27:05,061 INFO L226 Difference]: Without dead ends: 190 [2020-07-21 13:27:05,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 921 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:27:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-21 13:27:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2020-07-21 13:27:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-07-21 13:27:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 323 transitions. [2020-07-21 13:27:05,082 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 323 transitions. Word has length 475 [2020-07-21 13:27:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:05,083 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 323 transitions. [2020-07-21 13:27:05,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:27:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 323 transitions. [2020-07-21 13:27:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 13:27:05,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:05,090 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 30, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 13, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:05,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:05,303 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:05,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2007966904, now seen corresponding path program 33 times [2020-07-21 13:27:05,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:05,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944246623] [2020-07-21 13:27:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:06,091 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:06,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:27:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6842 backedges. 717 proven. 320 refuted. 0 times theorem prover too weak. 5805 trivial. 0 not checked. [2020-07-21 13:27:06,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:08,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:08,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:08,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:09,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:09,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:09,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:09,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:09,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:09,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6842 backedges. 721 proven. 330 refuted. 0 times theorem prover too weak. 5791 trivial. 0 not checked. [2020-07-21 13:27:10,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944246623] [2020-07-21 13:27:10,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:10,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:27:10,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794995275] [2020-07-21 13:27:10,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:27:10,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:10,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:27:10,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:27:10,671 INFO L87 Difference]: Start difference. First operand 169 states and 323 transitions. Second operand 17 states. [2020-07-21 13:27:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:11,088 INFO L93 Difference]: Finished difference Result 229 states and 440 transitions. [2020-07-21 13:27:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:27:11,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 490 [2020-07-21 13:27:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:11,092 INFO L225 Difference]: With dead ends: 229 [2020-07-21 13:27:11,093 INFO L226 Difference]: Without dead ends: 214 [2020-07-21 13:27:11,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 951 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:27:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-21 13:27:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 162. [2020-07-21 13:27:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 13:27:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 294 transitions. [2020-07-21 13:27:11,109 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 294 transitions. Word has length 490 [2020-07-21 13:27:11,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:11,110 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 294 transitions. [2020-07-21 13:27:11,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:27:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 294 transitions. [2020-07-21 13:27:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 13:27:11,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:11,115 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:11,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:11,316 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:11,317 INFO L82 PathProgramCache]: Analyzing trace with hash 4725059, now seen corresponding path program 34 times [2020-07-21 13:27:11,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:11,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028053745] [2020-07-21 13:27:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:12,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:12,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:27:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 936 proven. 252 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2020-07-21 13:27:12,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:14,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:14,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:15,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:16,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:16,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 936 proven. 278 refuted. 0 times theorem prover too weak. 5227 trivial. 0 not checked. [2020-07-21 13:27:17,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028053745] [2020-07-21 13:27:17,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:17,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:27:17,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042232407] [2020-07-21 13:27:17,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:17,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:17,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:17,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:17,323 INFO L87 Difference]: Start difference. First operand 162 states and 294 transitions. Second operand 19 states. [2020-07-21 13:27:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:17,848 INFO L93 Difference]: Finished difference Result 174 states and 311 transitions. [2020-07-21 13:27:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:17,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 476 [2020-07-21 13:27:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:17,851 INFO L225 Difference]: With dead ends: 174 [2020-07-21 13:27:17,851 INFO L226 Difference]: Without dead ends: 159 [2020-07-21 13:27:17,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 919 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:27:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-21 13:27:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2020-07-21 13:27:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 13:27:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 285 transitions. [2020-07-21 13:27:17,865 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 285 transitions. Word has length 476 [2020-07-21 13:27:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:17,866 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 285 transitions. [2020-07-21 13:27:17,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 285 transitions. [2020-07-21 13:27:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 13:27:17,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:17,872 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:18,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:18,088 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2071402723, now seen corresponding path program 35 times [2020-07-21 13:27:18,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:18,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406655045] [2020-07-21 13:27:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:18,869 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:18,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:27:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 825 proven. 182 refuted. 0 times theorem prover too weak. 5446 trivial. 0 not checked. [2020-07-21 13:27:19,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:20,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:20,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:21,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:22,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 831 proven. 190 refuted. 0 times theorem prover too weak. 5432 trivial. 0 not checked. [2020-07-21 13:27:22,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406655045] [2020-07-21 13:27:22,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:22,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 13:27:22,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052720600] [2020-07-21 13:27:22,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:27:22,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:27:22,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:27:22,998 INFO L87 Difference]: Start difference. First operand 156 states and 285 transitions. Second operand 17 states. [2020-07-21 13:27:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:23,386 INFO L93 Difference]: Finished difference Result 187 states and 335 transitions. [2020-07-21 13:27:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:27:23,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-21 13:27:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:23,391 INFO L225 Difference]: With dead ends: 187 [2020-07-21 13:27:23,391 INFO L226 Difference]: Without dead ends: 174 [2020-07-21 13:27:23,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 923 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:27:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-21 13:27:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2020-07-21 13:27:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-21 13:27:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 274 transitions. [2020-07-21 13:27:23,409 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 274 transitions. Word has length 476 [2020-07-21 13:27:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:23,410 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 274 transitions. [2020-07-21 13:27:23,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:27:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 274 transitions. [2020-07-21 13:27:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 13:27:23,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:23,416 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:23,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:23,630 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash -162910953, now seen corresponding path program 36 times [2020-07-21 13:27:23,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:23,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574148533] [2020-07-21 13:27:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:24,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:24,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:24,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:27:24,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5695 backedges. 599 proven. 175 refuted. 0 times theorem prover too weak. 4921 trivial. 0 not checked. [2020-07-21 13:27:24,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:25,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:25,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:26,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:26,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:26,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:26,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:26,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:26,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:26,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5695 backedges. 599 proven. 185 refuted. 0 times theorem prover too weak. 4911 trivial. 0 not checked. [2020-07-21 13:27:27,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574148533] [2020-07-21 13:27:27,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:27,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:27:27,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831833365] [2020-07-21 13:27:27,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:27:27,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:27,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:27:27,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:27:27,771 INFO L87 Difference]: Start difference. First operand 153 states and 274 transitions. Second operand 15 states. [2020-07-21 13:27:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:28,086 INFO L93 Difference]: Finished difference Result 222 states and 437 transitions. [2020-07-21 13:27:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:27:28,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 448 [2020-07-21 13:27:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:28,091 INFO L225 Difference]: With dead ends: 222 [2020-07-21 13:27:28,091 INFO L226 Difference]: Without dead ends: 210 [2020-07-21 13:27:28,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 871 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:27:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-21 13:27:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2020-07-21 13:27:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 13:27:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 270 transitions. [2020-07-21 13:27:28,107 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 270 transitions. Word has length 448 [2020-07-21 13:27:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:28,107 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 270 transitions. [2020-07-21 13:27:28,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:27:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 270 transitions. [2020-07-21 13:27:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 13:27:28,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:28,113 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 28, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 10, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:28,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:28,314 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1024827555, now seen corresponding path program 37 times [2020-07-21 13:27:28,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:28,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365385341] [2020-07-21 13:27:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:29,085 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:29,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:27:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 787 proven. 126 refuted. 0 times theorem prover too weak. 5567 trivial. 0 not checked. [2020-07-21 13:27:29,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:30,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:30,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:30,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:30,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:31,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:31,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:31,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:31,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 787 proven. 138 refuted. 0 times theorem prover too weak. 5555 trivial. 0 not checked. [2020-07-21 13:27:32,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365385341] [2020-07-21 13:27:32,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:32,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:27:32,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637019496] [2020-07-21 13:27:32,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:27:32,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:32,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:27:32,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:27:32,733 INFO L87 Difference]: Start difference. First operand 150 states and 270 transitions. Second operand 15 states. [2020-07-21 13:27:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:33,061 INFO L93 Difference]: Finished difference Result 221 states and 448 transitions. [2020-07-21 13:27:33,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:27:33,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 477 [2020-07-21 13:27:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:33,066 INFO L225 Difference]: With dead ends: 221 [2020-07-21 13:27:33,066 INFO L226 Difference]: Without dead ends: 208 [2020-07-21 13:27:33,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 929 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:27:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-21 13:27:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 153. [2020-07-21 13:27:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-21 13:27:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 280 transitions. [2020-07-21 13:27:33,080 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 280 transitions. Word has length 477 [2020-07-21 13:27:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:33,080 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 280 transitions. [2020-07-21 13:27:33,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:27:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 280 transitions. [2020-07-21 13:27:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 13:27:33,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:33,085 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:33,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:33,286 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1210027796, now seen corresponding path program 38 times [2020-07-21 13:27:33,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:33,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431073364] [2020-07-21 13:27:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:34,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:34,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:27:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1043 proven. 184 refuted. 0 times theorem prover too weak. 5613 trivial. 0 not checked. [2020-07-21 13:27:34,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:36,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:36,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:36,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:37,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:38,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:38,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1043 proven. 208 refuted. 0 times theorem prover too weak. 5589 trivial. 0 not checked. [2020-07-21 13:27:39,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431073364] [2020-07-21 13:27:39,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:39,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:27:39,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593778853] [2020-07-21 13:27:39,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:39,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:39,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:39,611 INFO L87 Difference]: Start difference. First operand 153 states and 280 transitions. Second operand 19 states. [2020-07-21 13:27:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:40,154 INFO L93 Difference]: Finished difference Result 187 states and 334 transitions. [2020-07-21 13:27:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:40,155 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 490 [2020-07-21 13:27:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:40,158 INFO L225 Difference]: With dead ends: 187 [2020-07-21 13:27:40,159 INFO L226 Difference]: Without dead ends: 174 [2020-07-21 13:27:40,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 947 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:27:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-21 13:27:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 145. [2020-07-21 13:27:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 13:27:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 263 transitions. [2020-07-21 13:27:40,171 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 263 transitions. Word has length 490 [2020-07-21 13:27:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:40,172 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 263 transitions. [2020-07-21 13:27:40,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 263 transitions. [2020-07-21 13:27:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 13:27:40,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:40,175 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:40,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:40,376 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash 747448674, now seen corresponding path program 39 times [2020-07-21 13:27:40,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:40,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448226415] [2020-07-21 13:27:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:41,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:41,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:41,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:27:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 245 proven. 910 refuted. 0 times theorem prover too weak. 4954 trivial. 0 not checked. [2020-07-21 13:27:41,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:44,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:45,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:45,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 253 proven. 926 refuted. 0 times theorem prover too weak. 4930 trivial. 0 not checked. [2020-07-21 13:27:46,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448226415] [2020-07-21 13:27:46,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:46,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 13:27:46,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114270212] [2020-07-21 13:27:46,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:27:46,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:27:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:27:46,866 INFO L87 Difference]: Start difference. First operand 145 states and 263 transitions. Second operand 19 states. [2020-07-21 13:27:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:47,519 INFO L93 Difference]: Finished difference Result 250 states and 500 transitions. [2020-07-21 13:27:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:27:47,520 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 464 [2020-07-21 13:27:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:47,524 INFO L225 Difference]: With dead ends: 250 [2020-07-21 13:27:47,524 INFO L226 Difference]: Without dead ends: 148 [2020-07-21 13:27:47,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 895 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:27:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-21 13:27:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2020-07-21 13:27:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 13:27:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 243 transitions. [2020-07-21 13:27:47,537 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 243 transitions. Word has length 464 [2020-07-21 13:27:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:47,537 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 243 transitions. [2020-07-21 13:27:47,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:27:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 243 transitions. [2020-07-21 13:27:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 13:27:47,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:47,540 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:47,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:47,741 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:47,742 INFO L82 PathProgramCache]: Analyzing trace with hash 959962007, now seen corresponding path program 40 times [2020-07-21 13:27:47,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:47,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89936328] [2020-07-21 13:27:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:48,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:48,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:27:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6427 backedges. 671 proven. 155 refuted. 0 times theorem prover too weak. 5601 trivial. 0 not checked. [2020-07-21 13:27:48,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:50,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:50,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:50,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:50,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:50,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:50,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:50,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:50,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:51,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6427 backedges. 673 proven. 163 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2020-07-21 13:27:52,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89936328] [2020-07-21 13:27:52,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:52,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:27:52,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966056818] [2020-07-21 13:27:52,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:27:52,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:27:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:27:52,745 INFO L87 Difference]: Start difference. First operand 145 states and 243 transitions. Second operand 15 states. [2020-07-21 13:27:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:53,108 INFO L93 Difference]: Finished difference Result 191 states and 336 transitions. [2020-07-21 13:27:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:27:53,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 475 [2020-07-21 13:27:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:53,114 INFO L225 Difference]: With dead ends: 191 [2020-07-21 13:27:53,114 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 13:27:53,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 925 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:27:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 13:27:53,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2020-07-21 13:27:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 13:27:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 232 transitions. [2020-07-21 13:27:53,131 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 232 transitions. Word has length 475 [2020-07-21 13:27:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:53,132 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 232 transitions. [2020-07-21 13:27:53,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:27:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 232 transitions. [2020-07-21 13:27:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 13:27:53,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:53,136 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:53,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:53,350 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash -357877815, now seen corresponding path program 41 times [2020-07-21 13:27:53,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:53,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087132305] [2020-07-21 13:27:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:54,207 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:54,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:54,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:27:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 113 refuted. 0 times theorem prover too weak. 5099 trivial. 0 not checked. [2020-07-21 13:27:54,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:27:55,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:55,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:55,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:55,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:55,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:55,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:56,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:27:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 120 refuted. 0 times theorem prover too weak. 5092 trivial. 0 not checked. [2020-07-21 13:27:57,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087132305] [2020-07-21 13:27:57,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:27:57,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:27:57,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562871387] [2020-07-21 13:27:57,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:27:57,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:27:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:27:57,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:27:57,821 INFO L87 Difference]: Start difference. First operand 140 states and 232 transitions. Second operand 13 states. [2020-07-21 13:27:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:27:58,151 INFO L93 Difference]: Finished difference Result 201 states and 384 transitions. [2020-07-21 13:27:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:27:58,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 450 [2020-07-21 13:27:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:27:58,158 INFO L225 Difference]: With dead ends: 201 [2020-07-21 13:27:58,158 INFO L226 Difference]: Without dead ends: 191 [2020-07-21 13:27:58,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 879 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:27:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-07-21 13:27:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 142. [2020-07-21 13:27:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 13:27:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 243 transitions. [2020-07-21 13:27:58,171 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 243 transitions. Word has length 450 [2020-07-21 13:27:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:27:58,172 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 243 transitions. [2020-07-21 13:27:58,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:27:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 243 transitions. [2020-07-21 13:27:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-21 13:27:58,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:27:58,177 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:27:58,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:58,392 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:27:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:27:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash -778040446, now seen corresponding path program 42 times [2020-07-21 13:27:58,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:27:58,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227833892] [2020-07-21 13:27:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:27:59,293 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:27:59,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:27:59,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:27:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:27:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 679 proven. 125 refuted. 0 times theorem prover too weak. 5252 trivial. 0 not checked. [2020-07-21 13:27:59,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:28:00,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:01,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:01,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:01,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:01,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:01,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:02,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:28:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 681 proven. 133 refuted. 0 times theorem prover too weak. 5242 trivial. 0 not checked. [2020-07-21 13:28:03,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227833892] [2020-07-21 13:28:03,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:28:03,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 13:28:03,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991862882] [2020-07-21 13:28:03,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:28:03,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:28:03,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:28:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:28:03,585 INFO L87 Difference]: Start difference. First operand 142 states and 243 transitions. Second operand 15 states. [2020-07-21 13:28:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:28:04,010 INFO L93 Difference]: Finished difference Result 177 states and 314 transitions. [2020-07-21 13:28:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:28:04,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 462 [2020-07-21 13:28:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:28:04,015 INFO L225 Difference]: With dead ends: 177 [2020-07-21 13:28:04,016 INFO L226 Difference]: Without dead ends: 167 [2020-07-21 13:28:04,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 899 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:28:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-07-21 13:28:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 137. [2020-07-21 13:28:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 13:28:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 228 transitions. [2020-07-21 13:28:04,027 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 228 transitions. Word has length 462 [2020-07-21 13:28:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:28:04,028 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 228 transitions. [2020-07-21 13:28:04,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:28:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 228 transitions. [2020-07-21 13:28:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 13:28:04,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:28:04,031 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:28:04,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:04,232 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:28:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:28:04,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 43 times [2020-07-21 13:28:04,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:28:04,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028393915] [2020-07-21 13:28:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:05,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:28:05,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:28:05,147 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:28:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:28:05,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:28:05,381 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:28:05,382 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:28:05,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:28:05,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:28:05 BoogieIcfgContainer [2020-07-21 13:28:05,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:28:05,799 INFO L168 Benchmark]: Toolchain (without parser) took 266070.00 ms. Allocated memory was 144.7 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 101.8 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 122.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:28:05,803 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 13:28:05,803 INFO L168 Benchmark]: CACSL2BoogieTranslator took 480.48 ms. Allocated memory is still 144.7 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:28:05,804 INFO L168 Benchmark]: Boogie Preprocessor took 296.81 ms. Allocated memory was 144.7 MB in the beginning and 207.6 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 186.0 MB in the end (delta: -94.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:28:05,804 INFO L168 Benchmark]: RCFGBuilder took 444.33 ms. Allocated memory is still 207.6 MB. Free memory was 186.0 MB in the beginning and 173.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:28:05,805 INFO L168 Benchmark]: TraceAbstraction took 264835.26 ms. Allocated memory was 207.6 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 172.5 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 130.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:28:05,808 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 480.48 ms. Allocated memory is still 144.7 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 296.81 ms. Allocated memory was 144.7 MB in the beginning and 207.6 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 186.0 MB in the end (delta: -94.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.33 ms. Allocated memory is still 207.6 MB. Free memory was 186.0 MB in the beginning and 173.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264835.26 ms. Allocated memory was 207.6 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 172.5 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 130.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 8; VAL [x=8] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=8] [L8] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L10] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L18] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L20] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=7, fibo1(n-1)=8, n=7] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=7, fibo1(n-1)=8, fibo1(n-2)=5, n=7] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=8, fibo2(n-1)=13, n=8] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=6] [L18] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L20] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=6, fibo1(n-1)=5, n=6] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=6, fibo1(n-1)=5, fibo1(n-2)=3, n=6] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=8, fibo2(n-1)=13, fibo2(n-2)=8, n=8] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=21, x=8] [L37] int result = fibo1(x); [L38] COND TRUE result == 21 VAL [result=21, x=8] [L39] __VERIFIER_error() VAL [result=21, x=8] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 264.5s, OverallIterations: 60, TraceHistogramMax: 61, AutomataDifference: 24.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1581 SDtfs, 3258 SDslu, 11181 SDs, 0 SdLazy, 12002 SolverSat, 3478 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43979 GetRequests, 42048 SyntacticMatches, 723 SemanticMatches, 1208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 22.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=194occurred in iteration=43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 59 MinimizatonAttempts, 2298 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 197.5s InterpolantComputationTime, 22312 NumberOfCodeBlocks, 22312 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 43555 ConstructedInterpolants, 0 QuantifiedInterpolants, 25568665 SizeOfPredicates, 400 NumberOfNonLiveVariables, 48655 ConjunctsInSsa, 800 ConjunctsInUnsatCore, 116 InterpolantComputations, 2 PerfectInterpolantSequences, 511345/562386 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 incorrect! Received shutdown request...