/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:18:44,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:18:44,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:18:45,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:18:45,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:18:45,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:18:45,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:18:45,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:18:45,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:18:45,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:18:45,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:18:45,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:18:45,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:18:45,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:18:45,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:18:45,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:18:45,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:18:45,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:18:45,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:18:45,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:18:45,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:18:45,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:18:45,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:18:45,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:18:45,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:18:45,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:18:45,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:18:45,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:18:45,040 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 22:18:45,056 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:18:45,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:18:45,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:18:45,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:18:45,059 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:18:45,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:18:45,059 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:18:45,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:18:45,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:18:45,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:18:45,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:18:45,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:18:45,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:18:45,061 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:18:45,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:18:45,061 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:18:45,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:18:45,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:18:45,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:18:45,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:18:45,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:18:45,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:18:45,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:18:45,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:18:45,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:18:45,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:18:45,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:45,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:18:45,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:18:45,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:18:45,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:18:45,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:18:45,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:18:45,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:18:45,407 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:18:45,409 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-21 22:18:45,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79638ed2/c8fcb59668f94754991a91ec9080b38f/FLAG11381863e [2020-07-21 22:18:45,938 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:18:45,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-21 22:18:45,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79638ed2/c8fcb59668f94754991a91ec9080b38f/FLAG11381863e [2020-07-21 22:18:46,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79638ed2/c8fcb59668f94754991a91ec9080b38f [2020-07-21 22:18:46,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:18:46,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:18:46,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:18:46,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:18:46,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:18:46,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1941cf0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46, skipping insertion in model container [2020-07-21 22:18:46,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:18:46,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:18:46,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:18:46,540 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:18:46,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:18:46,576 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:18:46,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46 WrapperNode [2020-07-21 22:18:46,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:18:46,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:18:46,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:18:46,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:18:46,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (1/1) ... [2020-07-21 22:18:46,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:18:46,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:18:46,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:18:46,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:18:46,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (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 22:18:46,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:18:46,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:18:46,807 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:18:46,808 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:18:46,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:18:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:18:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:18:46,810 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:18:46,811 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:18:46,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:18:46,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:18:46,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:18:47,027 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:18:47,027 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:18:47,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:18:47 BoogieIcfgContainer [2020-07-21 22:18:47,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:18:47,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:18:47,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:18:47,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:18:47,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:18:46" (1/3) ... [2020-07-21 22:18:47,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ef5abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:18:47, skipping insertion in model container [2020-07-21 22:18:47,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:18:46" (2/3) ... [2020-07-21 22:18:47,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ef5abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:18:47, skipping insertion in model container [2020-07-21 22:18:47,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:18:47" (3/3) ... [2020-07-21 22:18:47,044 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-07-21 22:18:47,058 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:18:47,066 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:18:47,087 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:18:47,138 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:18:47,139 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:18:47,139 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:18:47,139 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:18:47,139 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:18:47,139 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:18:47,140 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:18:47,140 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:18:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:18:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:18:47,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:47,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:47,180 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:47,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:18:47,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:47,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501004758] [2020-07-21 22:18:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:47,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:47,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:18:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:47,378 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 22:18:47,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:18:47,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501004758] [2020-07-21 22:18:47,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:18:47,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:18:47,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836218145] [2020-07-21 22:18:47,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:18:47,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:18:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:18:47,405 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:18:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:47,533 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:18:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:18:47,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:18:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:47,549 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:18:47,552 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:18:47,557 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 22:18:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:18:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:18:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:18:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:18:47,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:18:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:47,607 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:18:47,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:18:47,607 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:18:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:18:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:47,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:47,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:47,825 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:47,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:18:47,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:47,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872072362] [2020-07-21 22:18:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:47,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:18:47,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:47,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:18:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:47,906 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 22:18:47,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:18:47,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872072362] [2020-07-21 22:18:47,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:18:47,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:18:47,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350856417] [2020-07-21 22:18:47,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:18:47,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:18:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:18:47,911 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:18:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:47,984 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:18:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:18:47,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:18:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:47,987 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:18:47,987 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:18:47,988 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 22:18:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:18:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:18:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:18:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:18:47,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:18:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:47,999 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:18:47,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:18:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:18:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:18:48,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:48,002 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 22:18:48,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:48,215 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:18:48,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:48,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523208606] [2020-07-21 22:18:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:48,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:48,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:48,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:18:48,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:48,330 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 22:18:48,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:48,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:48,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:48,554 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 22:18:48,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523208606] [2020-07-21 22:18:48,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:48,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:18:48,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436144515] [2020-07-21 22:18:48,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:18:48,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:18:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:18:48,557 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:18:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:48,725 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:18:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:18:48,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:18:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:48,730 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:18:48,730 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:18:48,731 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 22:18:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:18:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:18:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:18:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:18:48,750 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:18:48,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:48,754 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:18:48,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:18:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:18:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:18:48,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:48,758 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 22:18:48,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:48,973 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:48,973 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:18:48,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:48,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284878636] [2020-07-21 22:18:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:49,000 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:49,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:49,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:18:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:49,055 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 22:18:49,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:49,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:49,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:49,223 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 22:18:49,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284878636] [2020-07-21 22:18:49,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:49,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:18:49,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050870567] [2020-07-21 22:18:49,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:18:49,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:49,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:18:49,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:18:49,226 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:18:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:49,350 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:18:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:18:49,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:18:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:49,353 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:18:49,353 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:18:49,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:18:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:18:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:18:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:18:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:18:49,366 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:18:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:49,366 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:18:49,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:18:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:18:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:18:49,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:49,371 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 22:18:49,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:49,586 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:49,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:18:49,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:49,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751726910] [2020-07-21 22:18:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:49,617 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:49,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:49,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:18:49,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:49,705 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 22:18:49,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:49,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:50,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:50,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:50,071 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 22:18:50,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751726910] [2020-07-21 22:18:50,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:50,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:18:50,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19449386] [2020-07-21 22:18:50,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:18:50,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:50,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:18:50,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:18:50,074 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:18:50,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:50,262 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:18:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:18:50,263 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:18:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:50,265 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:18:50,266 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:18:50,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:18:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:18:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:18:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:18:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:18:50,277 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:18:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:50,278 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:18:50,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:18:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:18:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:18:50,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:50,280 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 22:18:50,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:50,496 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:18:50,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:50,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142520373] [2020-07-21 22:18:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:50,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:18:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:50,586 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 22:18:50,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:50,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:50,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:50,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:50,907 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 22:18:50,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142520373] [2020-07-21 22:18:50,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:50,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:18:50,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648880369] [2020-07-21 22:18:50,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:18:50,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:18:50,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:18:50,910 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 11 states. [2020-07-21 22:18:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:51,084 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:18:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:18:51,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 22:18:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:51,091 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:18:51,092 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:18:51,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:18:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:18:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:18:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:18:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:18:51,117 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:18:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:51,118 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:18:51,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:18:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:18:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:18:51,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:51,127 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 22:18:51,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:51,328 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:51,329 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:18:51,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:51,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938507933] [2020-07-21 22:18:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:51,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:51,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:51,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:18:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:51,443 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 22:18:51,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:51,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:51,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:51,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:51,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,021 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 22:18:52,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938507933] [2020-07-21 22:18:52,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:52,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:18:52,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306897947] [2020-07-21 22:18:52,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:18:52,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:18:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:18:52,024 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 13 states. [2020-07-21 22:18:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:52,251 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:18:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:18:52,253 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-07-21 22:18:52,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:52,255 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:18:52,255 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:18:52,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:18:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:18:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:18:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:18:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:18:52,267 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:18:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:52,268 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:18:52,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:18:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:18:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:18:52,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:52,271 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 22:18:52,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:52,486 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:52,487 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:18:52,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:52,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568112333] [2020-07-21 22:18:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:52,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:18:52,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:18:52,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 22:18:52,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:52,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-21 22:18:52,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568112333] [2020-07-21 22:18:52,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:52,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:18:52,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724293281] [2020-07-21 22:18:52,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:18:52,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:18:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:18:52,952 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 11 states. [2020-07-21 22:18:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:53,141 INFO L93 Difference]: Finished difference Result 69 states and 116 transitions. [2020-07-21 22:18:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:18:53,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-07-21 22:18:53,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:53,144 INFO L225 Difference]: With dead ends: 69 [2020-07-21 22:18:53,145 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 22:18:53,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:18:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 22:18:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2020-07-21 22:18:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 22:18:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2020-07-21 22:18:53,175 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 54 [2020-07-21 22:18:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:53,176 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2020-07-21 22:18:53,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:18:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2020-07-21 22:18:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 22:18:53,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:53,181 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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 22:18:53,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:53,383 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:53,383 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-21 22:18:53,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:53,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201657368] [2020-07-21 22:18:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:53,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:18:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:53,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:18:53,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 22:18:53,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:53,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 22:18:53,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201657368] [2020-07-21 22:18:53,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:53,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 22:18:53,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882067723] [2020-07-21 22:18:53,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:18:53,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:53,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:18:53,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:18:53,695 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand 9 states. [2020-07-21 22:18:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:53,825 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2020-07-21 22:18:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:18:53,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-07-21 22:18:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:53,830 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:18:53,830 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:18:53,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:18:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:18:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-07-21 22:18:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 22:18:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 73 transitions. [2020-07-21 22:18:53,861 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 73 transitions. Word has length 55 [2020-07-21 22:18:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:53,862 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 73 transitions. [2020-07-21 22:18:53,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:18:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 73 transitions. [2020-07-21 22:18:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 22:18:53,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:53,868 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:54,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:54,083 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:54,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:54,084 INFO L82 PathProgramCache]: Analyzing trace with hash 643857677, now seen corresponding path program 1 times [2020-07-21 22:18:54,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:54,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895278035] [2020-07-21 22:18:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:54,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:18:54,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:18:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-21 22:18:54,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:54,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 22:18:54,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895278035] [2020-07-21 22:18:54,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:54,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:18:54,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577389184] [2020-07-21 22:18:54,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:18:54,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:18:54,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:18:54,655 INFO L87 Difference]: Start difference. First operand 49 states and 73 transitions. Second operand 11 states. [2020-07-21 22:18:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:54,805 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-07-21 22:18:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:18:54,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-07-21 22:18:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:54,808 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:18:54,808 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:18:54,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:18:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:18:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-07-21 22:18:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 22:18:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 22:18:54,819 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 67 [2020-07-21 22:18:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:54,820 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 22:18:54,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:18:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 22:18:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 22:18:54,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:54,822 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:55,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:55,037 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 2 times [2020-07-21 22:18:55,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:55,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561290283] [2020-07-21 22:18:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:55,087 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:18:55,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:55,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 22:18:55,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-21 22:18:55,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-21 22:18:55,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561290283] [2020-07-21 22:18:55,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:55,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-07-21 22:18:55,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49958746] [2020-07-21 22:18:55,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:18:55,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:55,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:18:55,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:18:55,748 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 21 states. [2020-07-21 22:18:55,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:55,972 INFO L93 Difference]: Finished difference Result 94 states and 186 transitions. [2020-07-21 22:18:55,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:18:55,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-07-21 22:18:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:55,975 INFO L225 Difference]: With dead ends: 94 [2020-07-21 22:18:55,975 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 22:18:55,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:18:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 22:18:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-07-21 22:18:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 22:18:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2020-07-21 22:18:55,996 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 68 [2020-07-21 22:18:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:55,997 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2020-07-21 22:18:55,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:18:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2020-07-21 22:18:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 22:18:55,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:56,000 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:56,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:56,214 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:56,215 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-07-21 22:18:56,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:56,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276955934] [2020-07-21 22:18:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:56,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:18:56,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:18:56,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-21 22:18:56,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:56,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:56,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:56,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:56,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:56,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:56,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:18:56,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276955934] [2020-07-21 22:18:56,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:56,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:18:56,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175504279] [2020-07-21 22:18:56,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:18:56,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:56,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:18:56,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:18:56,923 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand 13 states. [2020-07-21 22:18:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:57,127 INFO L93 Difference]: Finished difference Result 100 states and 214 transitions. [2020-07-21 22:18:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:18:57,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 22:18:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:57,135 INFO L225 Difference]: With dead ends: 100 [2020-07-21 22:18:57,135 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 22:18:57,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:18:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 22:18:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-21 22:18:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 22:18:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-21 22:18:57,179 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 82 [2020-07-21 22:18:57,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:57,180 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-21 22:18:57,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:18:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-21 22:18:57,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 22:18:57,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:57,183 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:57,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:57,399 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:57,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 3 times [2020-07-21 22:18:57,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:57,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996738754] [2020-07-21 22:18:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:57,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:18:57,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:57,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:18:57,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 22:18:57,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:57,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:57,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:57,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:57,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:57,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-21 22:18:57,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996738754] [2020-07-21 22:18:57,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:57,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:18:57,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228147701] [2020-07-21 22:18:57,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:18:57,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:57,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:18:57,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:18:57,862 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 11 states. [2020-07-21 22:18:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:58,027 INFO L93 Difference]: Finished difference Result 100 states and 219 transitions. [2020-07-21 22:18:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:18:58,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-21 22:18:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:58,029 INFO L225 Difference]: With dead ends: 100 [2020-07-21 22:18:58,029 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 22:18:58,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:18:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 22:18:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-21 22:18:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 22:18:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-21 22:18:58,042 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 69 [2020-07-21 22:18:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:58,042 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-21 22:18:58,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:18:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-21 22:18:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 22:18:58,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:58,045 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:58,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:58,261 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:58,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1082273126, now seen corresponding path program 3 times [2020-07-21 22:18:58,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:58,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374312775] [2020-07-21 22:18:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:58,308 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:18:58,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:18:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 22:18:58,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:58,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:58,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:58,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:58,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 22:18:58,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374312775] [2020-07-21 22:18:58,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:58,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 22:18:58,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006197490] [2020-07-21 22:18:58,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:18:58,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:18:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:18:58,813 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 13 states. [2020-07-21 22:18:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:59,025 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2020-07-21 22:18:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:18:59,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-21 22:18:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:59,028 INFO L225 Difference]: With dead ends: 97 [2020-07-21 22:18:59,028 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 22:18:59,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:18:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 22:18:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2020-07-21 22:18:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:18:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 112 transitions. [2020-07-21 22:18:59,043 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 112 transitions. Word has length 80 [2020-07-21 22:18:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:59,044 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 112 transitions. [2020-07-21 22:18:59,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:18:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 112 transitions. [2020-07-21 22:18:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 22:18:59,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:59,046 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:59,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:59,260 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:59,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2020-07-21 22:18:59,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:59,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951159694] [2020-07-21 22:18:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:59,303 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:18:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:59,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:18:59,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 22:18:59,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:59,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:59,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:59,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:59,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:59,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:59,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 22:18:59,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951159694] [2020-07-21 22:18:59,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:59,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:18:59,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860682042] [2020-07-21 22:18:59,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:18:59,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:18:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:18:59,907 INFO L87 Difference]: Start difference. First operand 64 states and 112 transitions. Second operand 13 states. [2020-07-21 22:19:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:00,121 INFO L93 Difference]: Finished difference Result 97 states and 209 transitions. [2020-07-21 22:19:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:00,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-21 22:19:00,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:00,123 INFO L225 Difference]: With dead ends: 97 [2020-07-21 22:19:00,123 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 22:19:00,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:19:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 22:19:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 22:19:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:19:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2020-07-21 22:19:00,146 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 69 [2020-07-21 22:19:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:00,147 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2020-07-21 22:19:00,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2020-07-21 22:19:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 22:19:00,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:00,153 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:00,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:00,367 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:00,367 INFO L82 PathProgramCache]: Analyzing trace with hash 817110694, now seen corresponding path program 4 times [2020-07-21 22:19:00,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:00,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457032815] [2020-07-21 22:19:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:00,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:00,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:00,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:19:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 22:19:00,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:00,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:00,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:00,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:00,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 22:19:00,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457032815] [2020-07-21 22:19:00,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:00,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 22:19:00,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045173284] [2020-07-21 22:19:00,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:19:00,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:19:00,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:19:00,962 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand 13 states. [2020-07-21 22:19:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:01,188 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-07-21 22:19:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:19:01,189 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-21 22:19:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:01,190 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:19:01,190 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 22:19:01,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:19:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 22:19:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 22:19:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:19:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 22:19:01,196 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 80 [2020-07-21 22:19:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:01,196 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 22:19:01,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:19:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 22:19:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 22:19:01,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:01,198 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 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 22:19:01,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:01,411 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:01,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-21 22:19:01,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:01,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568501017] [2020-07-21 22:19:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:19:01,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:19:01,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:01,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 22:19:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-07-21 22:19:01,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:01,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:02,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:02,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:02,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-21 22:19:02,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568501017] [2020-07-21 22:19:02,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:02,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 22:19:02,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012445003] [2020-07-21 22:19:02,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:19:02,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:02,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:19:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:19:02,244 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 15 states. [2020-07-21 22:19:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:02,456 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-07-21 22:19:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:19:02,456 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-21 22:19:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:02,457 INFO L225 Difference]: With dead ends: 89 [2020-07-21 22:19:02,457 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:19:02,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:19:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:19:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:19:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:19:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:19:02,460 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-07-21 22:19:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:02,460 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:19:02,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:19:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:19:02,461 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:19:02,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:02,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:19:03,618 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2020-07-21 22:19:03,952 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2020-07-21 22:19:03,956 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:19:03,956 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:19:03,956 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:19:03,956 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:19:03,956 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:19:03,957 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:19:03,957 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 22:19:03,957 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 22:19:03,957 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 22:19:03,957 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 22:19:03,957 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 22:19:03,957 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 22:19:03,958 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-07-21 22:19:03,958 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 22:19:03,958 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 22:19:03,958 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 22:19:03,958 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 22:19:03,958 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 22:19:03,958 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (and (= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|)) (<= 4 |fibo2_#in~n|)) (<= |fibo2_#in~n| fibo2_~n)) [2020-07-21 22:19:03,959 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 22:19:03,959 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 22:19:03,959 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 22:19:03,959 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 22:19:03,959 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 22:19:03,959 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 22:19:03,959 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 22:19:03,959 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 22:19:03,960 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= 2 |fibo1_#in~n|) .cse0 (= 1 |fibo1_#t~ret0|)))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and (= 2 |fibo1_#t~ret0|) .cse1) (and .cse1 (<= |fibo1_#in~n| 3)) (and (<= 5 |fibo1_#in~n|) .cse1)))) [2020-07-21 22:19:03,960 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 22:19:03,960 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 22:19:03,960 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 22:19:03,960 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 22:19:03,960 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 22:19:03,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:19:03 BoogieIcfgContainer [2020-07-21 22:19:03,967 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:19:03,969 INFO L168 Benchmark]: Toolchain (without parser) took 17633.33 ms. Allocated memory was 135.8 MB in the beginning and 341.8 MB in the end (delta: 206.0 MB). Free memory was 100.4 MB in the beginning and 149.9 MB in the end (delta: -49.6 MB). Peak memory consumption was 219.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:03,970 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 135.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 22:19:03,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.47 ms. Allocated memory is still 135.8 MB. Free memory was 99.9 MB in the beginning and 90.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:03,971 INFO L168 Benchmark]: Boogie Preprocessor took 166.97 ms. Allocated memory was 135.8 MB in the beginning and 203.4 MB in the end (delta: 67.6 MB). Free memory was 90.3 MB in the beginning and 181.8 MB in the end (delta: -91.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:03,971 INFO L168 Benchmark]: RCFGBuilder took 288.53 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:03,972 INFO L168 Benchmark]: TraceAbstraction took 16932.30 ms. Allocated memory was 203.4 MB in the beginning and 341.8 MB in the end (delta: 138.4 MB). Free memory was 168.1 MB in the beginning and 149.9 MB in the end (delta: 18.2 MB). Peak memory consumption was 219.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:19:03,975 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 135.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.47 ms. Allocated memory is still 135.8 MB. Free memory was 99.9 MB in the beginning and 90.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 166.97 ms. Allocated memory was 135.8 MB in the beginning and 203.4 MB in the end (delta: 67.6 MB). Free memory was 90.3 MB in the beginning and 181.8 MB in the end (delta: -91.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 288.53 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16932.30 ms. Allocated memory was 203.4 MB in the beginning and 341.8 MB in the end (delta: 138.4 MB). Free memory was 168.1 MB in the beginning and 149.9 MB in the end (delta: 18.2 MB). Peak memory consumption was 219.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.5s, OverallIterations: 17, TraceHistogramMax: 7, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 470 SDtfs, 435 SDslu, 2603 SDs, 0 SdLazy, 2048 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1849 GetRequests, 1544 SyntacticMatches, 97 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 162 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 71 PreInvPairs, 292 NumberOfFragments, 92 HoareAnnotationTreeSize, 71 FomulaSimplifications, 103936 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1276 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 915 NumberOfCodeBlocks, 638 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1771 ConstructedInterpolants, 0 QuantifiedInterpolants, 231460 SizeOfPredicates, 61 NumberOfNonLiveVariables, 1436 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 1521/2030 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...