/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:06:53,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:06:53,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:06:53,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:06:53,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:06:53,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:06:53,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:06:53,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:06:53,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:06:53,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:06:53,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:06:53,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:06:53,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:06:53,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:06:53,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:06:53,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:06:53,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:06:53,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:06:53,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:06:53,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:06:53,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:06:53,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:06:53,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:06:53,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:06:53,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:06:53,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:06:53,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:06:53,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:06:53,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:06:53,124 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:06:53,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:06:53,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:06:53,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:06:53,126 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:06:53,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:06:53,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:06:53,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:06:53,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:06:53,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:06:53,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:06:53,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:06:53,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:06:53,128 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:06:53,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:06:53,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:06:53,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:06:53,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:06:53,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:06:53,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:06:53,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:06:53,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:06:53,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:06:53,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:06:53,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:06:53,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:06:53,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:53,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:06:53,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:06:53,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:06:53,466 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:06:53,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:06:53,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:06:53,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:06:53,489 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:06:53,490 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-20 11:06:53,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/072e25104/337b3529c07a41dd9182896b901d4a8f/FLAGb185b2c0d [2020-07-20 11:06:54,308 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:06:54,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-20 11:06:54,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/072e25104/337b3529c07a41dd9182896b901d4a8f/FLAGb185b2c0d [2020-07-20 11:06:54,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/072e25104/337b3529c07a41dd9182896b901d4a8f [2020-07-20 11:06:54,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:06:54,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:06:54,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:06:54,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:06:54,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:06:54,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:54,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654517d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54, skipping insertion in model container [2020-07-20 11:06:54,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:54,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:06:54,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:06:54,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:06:54,856 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:06:54,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:06:54,894 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:06:54,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54 WrapperNode [2020-07-20 11:06:54,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:06:54,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:06:54,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:06:54,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:06:54,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:54,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:54,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:54,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:55,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:55,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:55,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (1/1) ... [2020-07-20 11:06:55,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:06:55,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:06:55,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:06:55,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:06:55,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:06:55,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:06:55,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:06:55,153 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 11:06:55,153 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 11:06:55,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:06:55,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:06:55,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:06:55,154 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 11:06:55,154 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 11:06:55,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:06:55,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:06:55,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:06:55,387 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:06:55,388 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:06:55,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:06:55 BoogieIcfgContainer [2020-07-20 11:06:55,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:06:55,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:06:55,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:06:55,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:06:55,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:06:54" (1/3) ... [2020-07-20 11:06:55,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ebf98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:06:55, skipping insertion in model container [2020-07-20 11:06:55,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:06:54" (2/3) ... [2020-07-20 11:06:55,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ebf98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:06:55, skipping insertion in model container [2020-07-20 11:06:55,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:06:55" (3/3) ... [2020-07-20 11:06:55,406 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-07-20 11:06:55,421 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:06:55,433 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:06:55,452 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:06:55,488 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:06:55,489 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:06:55,489 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:06:55,489 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:06:55,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:06:55,491 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:06:55,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:06:55,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:06:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 11:06:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:06:55,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:06:55,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:06:55,574 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:06:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:06:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 11:06:55,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:06:55,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601027917] [2020-07-20 11:06:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:06:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:06:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:06:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:06:55,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:06:55,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601027917] [2020-07-20 11:06:55,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:06:55,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:06:55,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100043508] [2020-07-20 11:06:55,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:06:55,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:06:55,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:06:55,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:06:55,824 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 11:06:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:06:55,973 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 11:06:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:06:55,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:06:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:06:55,990 INFO L225 Difference]: With dead ends: 44 [2020-07-20 11:06:55,990 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:06:55,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:06:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:06:56,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:06:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:06:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:06:56,052 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 11:06:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:06:56,052 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:06:56,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:06:56,053 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:06:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:06:56,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:06:56,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:06:56,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:56,271 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:06:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:06:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 11:06:56,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:06:56,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269294572] [2020-07-20 11:06:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:06:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:06:56,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:06:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:06:56,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:06:56,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269294572] [2020-07-20 11:06:56,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:06:56,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:06:56,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521461122] [2020-07-20 11:06:56,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:06:56,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:06:56,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:06:56,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:06:56,360 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 11:06:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:06:56,443 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 11:06:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:06:56,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:06:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:06:56,447 INFO L225 Difference]: With dead ends: 36 [2020-07-20 11:06:56,447 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:06:56,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:06:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:06:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 11:06:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:06:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:06:56,462 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 11:06:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:06:56,462 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:06:56,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:06:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:06:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:06:56,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:06:56,465 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:06:56,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:56,681 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:06:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:06:56,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 11:06:56,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:06:56,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090068970] [2020-07-20 11:06:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:06:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:06:56,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:06:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:06:56,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:06:56,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:57,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:06:57,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090068970] [2020-07-20 11:06:57,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:06:57,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:06:57,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368760752] [2020-07-20 11:06:57,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:06:57,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:06:57,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:06:57,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:06:57,081 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 11:06:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:06:57,243 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 11:06:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:06:57,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 11:06:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:06:57,246 INFO L225 Difference]: With dead ends: 41 [2020-07-20 11:06:57,246 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:06:57,248 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 [2020-07-20 11:06:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:06:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 11:06:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:06:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:06:57,259 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 11:06:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:06:57,260 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:06:57,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:06:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:06:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:06:57,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:06:57,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:06:57,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:57,478 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:06:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:06:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 11:06:57,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:06:57,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901370803] [2020-07-20 11:06:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:06:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:06:57,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:06:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:06:57,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:06:57,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:57,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:06:57,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901370803] [2020-07-20 11:06:57,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:06:57,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:06:57,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092341333] [2020-07-20 11:06:57,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:06:57,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:06:57,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:06:57,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:06:57,765 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 11:06:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:06:57,920 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 11:06:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:06:57,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 11:06:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:06:57,927 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:06:57,927 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:06:57,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:06:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:06:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 11:06:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:06:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:06:57,960 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 11:06:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:06:57,961 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:06:57,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:06:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:06:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:06:57,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:06:57,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:06:58,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:58,181 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:06:58,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:06:58,183 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 11:06:58,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:06:58,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780239352] [2020-07-20 11:06:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:06:58,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:06:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:06:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:06:58,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:06:58,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:58,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:58,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:06:58,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780239352] [2020-07-20 11:06:58,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:06:58,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:06:58,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391692900] [2020-07-20 11:06:58,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:06:58,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:06:58,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:06:58,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:06:58,710 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 11:06:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:06:58,919 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 11:06:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:06:58,920 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 11:06:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:06:58,922 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:06:58,923 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:06:58,924 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 [2020-07-20 11:06:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:06:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 11:06:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:06:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:06:58,948 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 11:06:58,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:06:58,951 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:06:58,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:06:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:06:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 11:06:58,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:06:58,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:06:59,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:59,161 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:06:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:06:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 11:06:59,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:06:59,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328368099] [2020-07-20 11:06:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:06:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:06:59,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:06:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:06:59,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:06:59,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:59,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:59,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:06:59,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328368099] [2020-07-20 11:06:59,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:06:59,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 11:06:59,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964285050] [2020-07-20 11:06:59,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:06:59,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:06:59,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:06:59,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:06:59,637 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 11 states. [2020-07-20 11:06:59,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:06:59,847 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 11:06:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:06:59,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-20 11:06:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:06:59,856 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:06:59,856 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 11:06:59,861 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 [2020-07-20 11:06:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 11:06:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 11:06:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:06:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:06:59,886 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 11:06:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:06:59,887 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:06:59,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:06:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:06:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 11:06:59,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:06:59,894 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:07:00,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:00,110 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 11:07:00,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:00,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801664850] [2020-07-20 11:07:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:00,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:07:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 11:07:00,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:00,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:00,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:00,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:00,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:07:00,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801664850] [2020-07-20 11:07:00,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:00,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:07:00,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579927759] [2020-07-20 11:07:00,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:07:00,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:07:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:07:00,847 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 13 states. [2020-07-20 11:07:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:01,075 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 11:07:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:07:01,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-07-20 11:07:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:01,079 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:07:01,080 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:07:01,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:07:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:07:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 11:07:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:07:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:07:01,096 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 11:07:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:01,096 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:07:01,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:07:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:07:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 11:07:01,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:01,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:07:01,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:01,310 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:01,311 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 11:07:01,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:01,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483496965] [2020-07-20 11:07:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:01,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:07:01,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 11:07:01,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:01,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:01,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:01,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:01,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 11:07:01,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483496965] [2020-07-20 11:07:01,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:01,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 11:07:01,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801930411] [2020-07-20 11:07:01,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:07:01,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:07:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:07:01,826 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 11 states. [2020-07-20 11:07:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:02,027 INFO L93 Difference]: Finished difference Result 69 states and 116 transitions. [2020-07-20 11:07:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:07:02,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-07-20 11:07:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:02,030 INFO L225 Difference]: With dead ends: 69 [2020-07-20 11:07:02,030 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 11:07:02,034 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 [2020-07-20 11:07:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 11:07:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2020-07-20 11:07:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 11:07:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2020-07-20 11:07:02,079 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 54 [2020-07-20 11:07:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:02,083 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2020-07-20 11:07:02,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:07:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2020-07-20 11:07:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 11:07:02,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:02,087 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] [2020-07-20 11:07:02,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:02,305 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-20 11:07:02,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:02,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893997974] [2020-07-20 11:07:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:07:02,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 11:07:02,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:02,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:02,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 11:07:02,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893997974] [2020-07-20 11:07:02,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:02,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 11:07:02,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253447518] [2020-07-20 11:07:02,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:07:02,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:02,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:07:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:07:02,682 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand 9 states. [2020-07-20 11:07:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:02,888 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2020-07-20 11:07:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:07:02,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-07-20 11:07:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:02,894 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:07:02,895 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:07:02,897 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 [2020-07-20 11:07:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:07:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-07-20 11:07:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 11:07:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 73 transitions. [2020-07-20 11:07:02,911 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 73 transitions. Word has length 55 [2020-07-20 11:07:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:02,912 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 73 transitions. [2020-07-20 11:07:02,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:07:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 73 transitions. [2020-07-20 11:07:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 11:07:02,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:02,915 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] [2020-07-20 11:07:03,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:03,130 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash 643857677, now seen corresponding path program 1 times [2020-07-20 11:07:03,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:03,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635889161] [2020-07-20 11:07:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:07:03,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-20 11:07:03,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:03,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:03,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:03,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 11:07:03,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635889161] [2020-07-20 11:07:03,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:03,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 11:07:03,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696321234] [2020-07-20 11:07:03,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:07:03,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:03,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:07:03,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:07:03,727 INFO L87 Difference]: Start difference. First operand 49 states and 73 transitions. Second operand 11 states. [2020-07-20 11:07:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:03,889 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-07-20 11:07:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:07:03,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-07-20 11:07:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:03,891 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:07:03,891 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:07:03,892 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 [2020-07-20 11:07:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:07:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-07-20 11:07:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 11:07:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-20 11:07:03,903 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 67 [2020-07-20 11:07:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:03,904 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-20 11:07:03,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:07:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-20 11:07:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 11:07:03,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:03,906 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] [2020-07-20 11:07:04,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:04,121 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 2 times [2020-07-20 11:07:04,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:04,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73695488] [2020-07-20 11:07:04,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:04,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 11:07:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-20 11:07:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-20 11:07:04,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73695488] [2020-07-20 11:07:04,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:04,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-07-20 11:07:04,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886326207] [2020-07-20 11:07:04,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:07:04,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:07:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:07:04,894 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 21 states. [2020-07-20 11:07:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:05,177 INFO L93 Difference]: Finished difference Result 94 states and 186 transitions. [2020-07-20 11:07:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 11:07:05,178 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-07-20 11:07:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:05,182 INFO L225 Difference]: With dead ends: 94 [2020-07-20 11:07:05,183 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 11:07:05,187 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 [2020-07-20 11:07:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 11:07:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-07-20 11:07:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 11:07:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2020-07-20 11:07:05,235 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 68 [2020-07-20 11:07:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:05,238 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2020-07-20 11:07:05,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:07:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2020-07-20 11:07:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 11:07:05,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:05,245 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] [2020-07-20 11:07:05,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:05,460 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:05,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:05,461 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-07-20 11:07:05,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:05,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011042791] [2020-07-20 11:07:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:05,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:07:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 11:07:05,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:06,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:06,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:06,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:06,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:06,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:06,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 11:07:06,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011042791] [2020-07-20 11:07:06,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:06,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:07:06,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854591606] [2020-07-20 11:07:06,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:07:06,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:06,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:07:06,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:07:06,319 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand 13 states. [2020-07-20 11:07:06,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:06,570 INFO L93 Difference]: Finished difference Result 100 states and 214 transitions. [2020-07-20 11:07:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:07:06,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-20 11:07:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:06,577 INFO L225 Difference]: With dead ends: 100 [2020-07-20 11:07:06,578 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 11:07:06,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:07:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 11:07:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-20 11:07:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 11:07:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-20 11:07:06,596 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 82 [2020-07-20 11:07:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:06,597 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-20 11:07:06,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:07:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-20 11:07:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 11:07:06,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:06,599 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] [2020-07-20 11:07:06,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:06,814 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:06,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:06,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 3 times [2020-07-20 11:07:06,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:06,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080501392] [2020-07-20 11:07:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:07:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-20 11:07:06,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:07,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:07,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:07,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:07,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:07,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-20 11:07:07,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080501392] [2020-07-20 11:07:07,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:07,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 11:07:07,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175615380] [2020-07-20 11:07:07,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:07:07,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:07,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:07:07,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:07:07,377 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 11 states. [2020-07-20 11:07:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:07,585 INFO L93 Difference]: Finished difference Result 100 states and 219 transitions. [2020-07-20 11:07:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:07:07,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-20 11:07:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:07,593 INFO L225 Difference]: With dead ends: 100 [2020-07-20 11:07:07,593 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 11:07:07,595 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 [2020-07-20 11:07:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 11:07:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-20 11:07:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 11:07:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-20 11:07:07,612 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 69 [2020-07-20 11:07:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:07,612 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-20 11:07:07,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:07:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-20 11:07:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 11:07:07,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:07,616 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] [2020-07-20 11:07:07,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:07,830 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:07,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1082273126, now seen corresponding path program 3 times [2020-07-20 11:07:07,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:07,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315174726] [2020-07-20 11:07:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:07:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-20 11:07:07,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:08,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:08,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:08,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:08,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 11:07:08,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315174726] [2020-07-20 11:07:08,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:08,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 11:07:08,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469003119] [2020-07-20 11:07:08,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:07:08,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:08,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:07:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:07:08,483 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 13 states. [2020-07-20 11:07:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:08,738 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2020-07-20 11:07:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:07:08,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-20 11:07:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:08,741 INFO L225 Difference]: With dead ends: 97 [2020-07-20 11:07:08,741 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 11:07:08,742 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 [2020-07-20 11:07:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 11:07:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2020-07-20 11:07:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:07:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 112 transitions. [2020-07-20 11:07:08,756 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 112 transitions. Word has length 80 [2020-07-20 11:07:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:08,756 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 112 transitions. [2020-07-20 11:07:08,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:07:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 112 transitions. [2020-07-20 11:07:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 11:07:08,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:08,759 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] [2020-07-20 11:07:08,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:08,974 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2020-07-20 11:07:08,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:08,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667622856] [2020-07-20 11:07:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:09,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:07:09,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 11:07:09,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:09,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:09,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:09,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:09,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:09,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:09,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 11:07:09,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667622856] [2020-07-20 11:07:09,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:09,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:07:09,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371501245] [2020-07-20 11:07:09,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:07:09,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:07:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:07:09,733 INFO L87 Difference]: Start difference. First operand 64 states and 112 transitions. Second operand 13 states. [2020-07-20 11:07:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:09,999 INFO L93 Difference]: Finished difference Result 97 states and 209 transitions. [2020-07-20 11:07:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:07:10,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-20 11:07:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:10,002 INFO L225 Difference]: With dead ends: 97 [2020-07-20 11:07:10,003 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 11:07:10,005 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 [2020-07-20 11:07:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 11:07:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 11:07:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:07:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2020-07-20 11:07:10,017 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 69 [2020-07-20 11:07:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:10,018 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2020-07-20 11:07:10,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:07:10,019 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2020-07-20 11:07:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 11:07:10,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:10,022 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] [2020-07-20 11:07:10,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:10,237 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:10,238 INFO L82 PathProgramCache]: Analyzing trace with hash 817110694, now seen corresponding path program 4 times [2020-07-20 11:07:10,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:10,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687158327] [2020-07-20 11:07:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:07:10,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-20 11:07:10,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:10,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:10,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:11,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:11,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 11:07:11,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687158327] [2020-07-20 11:07:11,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:11,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 11:07:11,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328838924] [2020-07-20 11:07:11,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:07:11,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:07:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:07:11,161 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand 13 states. [2020-07-20 11:07:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:11,492 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-07-20 11:07:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:07:11,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-20 11:07:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:11,500 INFO L225 Difference]: With dead ends: 86 [2020-07-20 11:07:11,500 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 11:07:11,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:07:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 11:07:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 11:07:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:07:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-20 11:07:11,512 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 80 [2020-07-20 11:07:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:11,513 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-20 11:07:11,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:07:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-20 11:07:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 11:07:11,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:11,516 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] [2020-07-20 11:07:11,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:11,724 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-20 11:07:11,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:11,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051625302] [2020-07-20 11:07:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:11,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:07:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-07-20 11:07:11,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:12,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:12,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:12,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:12,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-20 11:07:12,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051625302] [2020-07-20 11:07:12,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:12,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 11:07:12,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763442873] [2020-07-20 11:07:12,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:07:12,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:12,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:07:12,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:07:12,716 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 15 states. [2020-07-20 11:07:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:12,934 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-07-20 11:07:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:07:12,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-20 11:07:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:12,936 INFO L225 Difference]: With dead ends: 89 [2020-07-20 11:07:12,936 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:07:12,938 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 [2020-07-20 11:07:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:07:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:07:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:07:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:07:12,939 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-07-20 11:07:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:12,940 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:07:12,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:07:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:07:12,940 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:07:13,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:13,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:07:14,180 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2020-07-20 11:07:14,607 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2020-07-20 11:07:14,613 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:07:14,613 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:07:14,613 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:07:14,613 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:07:14,613 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:07:14,614 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:07:14,614 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 11:07:14,614 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 11:07:14,614 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 11:07:14,614 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 11:07:14,615 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 11:07:14,615 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 11:07:14,615 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-07-20 11:07:14,615 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 11:07:14,615 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 11:07:14,615 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 11:07:14,615 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-20 11:07:14,616 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 11:07:14,616 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)) [2020-07-20 11:07:14,616 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 11:07:14,616 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 11:07:14,616 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 11:07:14,616 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 11:07:14,617 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 11:07:14,617 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 11:07:14,617 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-20 11:07:14,617 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 11:07:14,617 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)))) [2020-07-20 11:07:14,618 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 11:07:14,618 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 11:07:14,618 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 11:07:14,618 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 11:07:14,618 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 11:07:14,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:07:14 BoogieIcfgContainer [2020-07-20 11:07:14,628 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:07:14,631 INFO L168 Benchmark]: Toolchain (without parser) took 19996.32 ms. Allocated memory was 144.2 MB in the beginning and 350.7 MB in the end (delta: 206.6 MB). Free memory was 101.8 MB in the beginning and 150.5 MB in the end (delta: -48.8 MB). Peak memory consumption was 218.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:07:14,632 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 11:07:14,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.14 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:07:14,634 INFO L168 Benchmark]: Boogie Preprocessor took 163.92 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.8 MB in the beginning and 181.0 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:07:14,634 INFO L168 Benchmark]: RCFGBuilder took 334.52 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 167.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:07:14,635 INFO L168 Benchmark]: TraceAbstraction took 19231.73 ms. Allocated memory was 202.4 MB in the beginning and 350.7 MB in the end (delta: 148.4 MB). Free memory was 166.9 MB in the beginning and 150.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 225.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:07:14,639 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.14 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.92 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.8 MB in the beginning and 181.0 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 334.52 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 167.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19231.73 ms. Allocated memory was 202.4 MB in the beginning and 350.7 MB in the end (delta: 148.4 MB). Free memory was 166.9 MB in the beginning and 150.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 225.8 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: 17.6s, OverallIterations: 17, TraceHistogramMax: 7, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 470 SDtfs, 435 SDslu, 2603 SDs, 0 SdLazy, 2048 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1849 GetRequests, 1544 SyntacticMatches, 97 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.9s 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: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 162 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 71 PreInvPairs, 292 NumberOfFragments, 92 HoareAnnotationTreeSize, 71 FomulaSimplifications, 103936 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1276 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 915 NumberOfCodeBlocks, 915 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1771 ConstructedInterpolants, 0 QuantifiedInterpolants, 231460 SizeOfPredicates, 61 NumberOfNonLiveVariables, 2051 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...