/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/loop-invgen/apache-get-tag.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:52:42,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:52:42,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:52:42,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:52:42,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:52:42,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:52:42,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:52:42,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:52:42,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:52:42,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:52:42,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:52:42,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:52:42,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:52:42,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:52:42,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:52:42,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:52:42,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:52:42,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:52:42,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:52:42,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:52:42,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:52:42,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:52:42,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:52:42,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:52:42,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:52:42,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:52:42,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:52:42,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:52:42,966 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 11:52:42,982 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:52:42,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:52:42,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:52:42,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:52:42,984 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:52:42,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:52:42,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:52:42,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:52:42,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:52:42,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:52:42,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:52:42,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:52:42,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:52:42,986 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:52:42,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:52:42,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:52:42,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:52:42,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:52:42,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:52:42,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:52:42,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:52:42,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:52:42,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:52:42,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:52:42,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:52:42,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:52:42,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:42,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:52:42,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:52:42,989 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 11:52:43,345 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:52:43,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:52:43,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:52:43,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:52:43,363 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:52:43,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2020-07-20 11:52:43,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc742b1df/411b2eb5adc54f048a9772c20c96b118/FLAGf50aa534f [2020-07-20 11:52:43,864 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:52:43,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2020-07-20 11:52:43,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc742b1df/411b2eb5adc54f048a9772c20c96b118/FLAGf50aa534f [2020-07-20 11:52:44,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc742b1df/411b2eb5adc54f048a9772c20c96b118 [2020-07-20 11:52:44,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:52:44,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:52:44,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:52:44,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:52:44,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:52:44,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f171bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44, skipping insertion in model container [2020-07-20 11:52:44,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:52:44,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:52:44,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:52:44,551 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:52:44,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:52:44,601 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:52:44,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44 WrapperNode [2020-07-20 11:52:44,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:52:44,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:52:44,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:52:44,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:52:44,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (1/1) ... [2020-07-20 11:52:44,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:52:44,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:52:44,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:52:44,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:52:44,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (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 11:52:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:52:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:52:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:52:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:52:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:52:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:52:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:52:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:52:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:52:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:52:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:52:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:52:45,217 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:52:45,217 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:52:45,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:52:45 BoogieIcfgContainer [2020-07-20 11:52:45,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:52:45,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:52:45,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:52:45,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:52:45,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:52:44" (1/3) ... [2020-07-20 11:52:45,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66108c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:52:45, skipping insertion in model container [2020-07-20 11:52:45,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:44" (2/3) ... [2020-07-20 11:52:45,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66108c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:52:45, skipping insertion in model container [2020-07-20 11:52:45,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:52:45" (3/3) ... [2020-07-20 11:52:45,230 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+nlh-reducer.c [2020-07-20 11:52:45,240 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:52:45,247 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2020-07-20 11:52:45,261 INFO L251 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-07-20 11:52:45,289 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:52:45,291 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:52:45,291 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:52:45,291 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:52:45,291 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:52:45,292 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:52:45,292 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:52:45,292 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:52:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-07-20 11:52:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:52:45,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:45,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:45,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1093455773, now seen corresponding path program 1 times [2020-07-20 11:52:45,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:45,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422360597] [2020-07-20 11:52:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:45,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:52:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:45,558 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:45,564 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:45,585 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 11:52:45,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:45,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422360597] [2020-07-20 11:52:45,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:45,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:52:45,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40290226] [2020-07-20 11:52:45,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:52:45,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:45,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:52:45,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:52:45,611 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 4 states. [2020-07-20 11:52:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:45,815 INFO L93 Difference]: Finished difference Result 129 states and 172 transitions. [2020-07-20 11:52:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:52:45,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 11:52:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:45,828 INFO L225 Difference]: With dead ends: 129 [2020-07-20 11:52:45,829 INFO L226 Difference]: Without dead ends: 113 [2020-07-20 11:52:45,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-20 11:52:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-07-20 11:52:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 11:52:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-07-20 11:52:45,876 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 12 [2020-07-20 11:52:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:45,877 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-07-20 11:52:45,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:52:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-07-20 11:52:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:52:45,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:45,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:46,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:46,093 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:46,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1096690079, now seen corresponding path program 1 times [2020-07-20 11:52:46,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:46,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657962764] [2020-07-20 11:52:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:46,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:52:46,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:46,158 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:46,172 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 11:52:46,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:46,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657962764] [2020-07-20 11:52:46,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:46,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:52:46,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725231933] [2020-07-20 11:52:46,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:52:46,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:46,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:52:46,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:52:46,180 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 4 states. [2020-07-20 11:52:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:46,286 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-07-20 11:52:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:52:46,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 11:52:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:46,291 INFO L225 Difference]: With dead ends: 69 [2020-07-20 11:52:46,291 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:52:46,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:52:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-20 11:52:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:52:46,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-07-20 11:52:46,313 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 12 [2020-07-20 11:52:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:46,314 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-07-20 11:52:46,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:52:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-07-20 11:52:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:52:46,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:46,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:46,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:46,524 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash 362348992, now seen corresponding path program 1 times [2020-07-20 11:52:46,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:46,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123686089] [2020-07-20 11:52:46,528 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 11:52:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:46,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:52:46,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:46,596 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:46,602 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:46,604 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:46,612 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 11:52:46,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:46,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123686089] [2020-07-20 11:52:46,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:46,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:52:46,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856978800] [2020-07-20 11:52:46,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:52:46,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:46,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:52:46,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:52:46,615 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 4 states. [2020-07-20 11:52:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:46,683 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-07-20 11:52:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:52:46,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-20 11:52:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:46,685 INFO L225 Difference]: With dead ends: 109 [2020-07-20 11:52:46,685 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 11:52:46,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 11:52:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-20 11:52:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 11:52:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-07-20 11:52:46,695 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 13 [2020-07-20 11:52:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:46,696 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-07-20 11:52:46,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:52:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-07-20 11:52:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 11:52:46,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:46,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:46,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:46,904 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2105928756, now seen corresponding path program 1 times [2020-07-20 11:52:46,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:46,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069597130] [2020-07-20 11:52:46,907 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 11:52:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:46,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:52:46,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:46,977 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:46,994 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 11:52:46,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:46,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069597130] [2020-07-20 11:52:46,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:46,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:52:46,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647364695] [2020-07-20 11:52:46,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:52:46,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:46,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:52:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:46,998 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 5 states. [2020-07-20 11:52:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:47,104 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-07-20 11:52:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:52:47,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 11:52:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:47,107 INFO L225 Difference]: With dead ends: 71 [2020-07-20 11:52:47,107 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 11:52:47,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 11:52:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-07-20 11:52:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 11:52:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-07-20 11:52:47,122 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 15 [2020-07-20 11:52:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:47,122 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-07-20 11:52:47,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:52:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-07-20 11:52:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 11:52:47,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:47,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:47,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:47,342 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:47,342 INFO L82 PathProgramCache]: Analyzing trace with hash 325126884, now seen corresponding path program 1 times [2020-07-20 11:52:47,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:47,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347317947] [2020-07-20 11:52:47,343 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 11:52:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:52:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:47,389 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:47,391 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:47,400 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 11:52:47,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:47,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347317947] [2020-07-20 11:52:47,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:47,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:52:47,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151519689] [2020-07-20 11:52:47,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:52:47,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:47,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:52:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:47,403 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 5 states. [2020-07-20 11:52:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:47,511 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-07-20 11:52:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:52:47,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 11:52:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:47,513 INFO L225 Difference]: With dead ends: 69 [2020-07-20 11:52:47,513 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:52:47,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:52:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-07-20 11:52:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 11:52:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-07-20 11:52:47,520 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 15 [2020-07-20 11:52:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:47,521 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-07-20 11:52:47,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:52:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-07-20 11:52:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:52:47,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:47,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:47,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:47,723 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash -858848822, now seen corresponding path program 1 times [2020-07-20 11:52:47,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:47,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178219065] [2020-07-20 11:52:47,725 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 11:52:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:47,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:52:47,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:47,777 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:47,781 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:47,790 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 11:52:47,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:47,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178219065] [2020-07-20 11:52:47,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:47,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:52:47,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158950862] [2020-07-20 11:52:47,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:52:47,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:47,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:52:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:47,798 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 5 states. [2020-07-20 11:52:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:47,941 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-07-20 11:52:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:52:47,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 11:52:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:47,944 INFO L225 Difference]: With dead ends: 112 [2020-07-20 11:52:47,944 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 11:52:47,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 11:52:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 64. [2020-07-20 11:52:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:52:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-07-20 11:52:47,953 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 16 [2020-07-20 11:52:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:47,953 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-07-20 11:52:47,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:52:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-07-20 11:52:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:52:47,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:47,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:48,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:48,168 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:48,169 INFO L82 PathProgramCache]: Analyzing trace with hash -859278805, now seen corresponding path program 1 times [2020-07-20 11:52:48,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:48,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903801998] [2020-07-20 11:52:48,171 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 11:52:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:48,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:52:48,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:48,226 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:48,233 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 11:52:48,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:48,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903801998] [2020-07-20 11:52:48,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:48,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:52:48,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430112415] [2020-07-20 11:52:48,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:52:48,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:52:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:52:48,236 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 4 states. [2020-07-20 11:52:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:48,307 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-07-20 11:52:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:52:48,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-20 11:52:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:48,308 INFO L225 Difference]: With dead ends: 65 [2020-07-20 11:52:48,308 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 11:52:48,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 11:52:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-07-20 11:52:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:52:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-07-20 11:52:48,316 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 16 [2020-07-20 11:52:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:48,317 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-07-20 11:52:48,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:52:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-07-20 11:52:48,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:52:48,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:48,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:48,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:48,536 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1489001901, now seen corresponding path program 1 times [2020-07-20 11:52:48,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:48,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537494925] [2020-07-20 11:52:48,538 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 11:52:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:52:48,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:48,600 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:48,602 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:48,611 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 11:52:48,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:48,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537494925] [2020-07-20 11:52:48,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:48,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:52:48,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439237941] [2020-07-20 11:52:48,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:52:48,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:48,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:52:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:52:48,613 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 4 states. [2020-07-20 11:52:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:48,672 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-07-20 11:52:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:52:48,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-20 11:52:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:48,674 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:52:48,674 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:52:48,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:52:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-07-20 11:52:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 11:52:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-07-20 11:52:48,680 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 16 [2020-07-20 11:52:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:48,680 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-07-20 11:52:48,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:52:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-07-20 11:52:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:52:48,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:48,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:48,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:48,882 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash -854506496, now seen corresponding path program 1 times [2020-07-20 11:52:48,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:48,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479720637] [2020-07-20 11:52:48,884 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 11:52:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:52:48,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:48,994 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:48,996 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:49,003 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 11:52:49,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:49,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479720637] [2020-07-20 11:52:49,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:49,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:52:49,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536940418] [2020-07-20 11:52:49,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:52:49,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:52:49,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:49,005 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 6 states. [2020-07-20 11:52:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:49,181 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2020-07-20 11:52:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:52:49,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 11:52:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:49,185 INFO L225 Difference]: With dead ends: 130 [2020-07-20 11:52:49,185 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 11:52:49,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:52:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 11:52:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 61. [2020-07-20 11:52:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 11:52:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-07-20 11:52:49,192 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 17 [2020-07-20 11:52:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:49,193 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-07-20 11:52:49,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:52:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-07-20 11:52:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:52:49,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:49,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:49,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:49,409 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:49,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:49,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1071358986, now seen corresponding path program 1 times [2020-07-20 11:52:49,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:49,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548414141] [2020-07-20 11:52:49,412 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 11:52:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:52:49,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:49,463 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:49,464 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:49,472 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 11:52:49,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:49,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548414141] [2020-07-20 11:52:49,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:49,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:52:49,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038272659] [2020-07-20 11:52:49,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:52:49,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:49,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:52:49,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:49,475 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 5 states. [2020-07-20 11:52:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:49,554 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-07-20 11:52:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:52:49,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-20 11:52:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:49,556 INFO L225 Difference]: With dead ends: 78 [2020-07-20 11:52:49,556 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 11:52:49,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 11:52:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-07-20 11:52:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 11:52:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-07-20 11:52:49,567 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 17 [2020-07-20 11:52:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:49,568 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-07-20 11:52:49,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:52:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-07-20 11:52:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:52:49,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:49,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:49,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:49,773 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1069819786, now seen corresponding path program 1 times [2020-07-20 11:52:49,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:49,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223086944] [2020-07-20 11:52:49,775 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 11:52:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:52:49,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:49,823 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:49,832 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 11:52:49,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:49,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223086944] [2020-07-20 11:52:49,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:49,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:52:49,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924316857] [2020-07-20 11:52:49,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:52:49,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:49,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:52:49,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:49,835 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 5 states. [2020-07-20 11:52:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:49,911 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-07-20 11:52:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:52:49,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-20 11:52:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:49,913 INFO L225 Difference]: With dead ends: 59 [2020-07-20 11:52:49,913 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:52:49,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:52:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 11:52:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 11:52:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-07-20 11:52:49,918 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 17 [2020-07-20 11:52:49,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:49,919 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-07-20 11:52:49,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:52:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-07-20 11:52:49,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:52:49,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:49,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:50,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:50,125 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash -726143538, now seen corresponding path program 1 times [2020-07-20 11:52:50,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:50,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282422273] [2020-07-20 11:52:50,127 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 11:52:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:50,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:52:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:50,206 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:50,208 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:50,219 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 11:52:50,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:50,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282422273] [2020-07-20 11:52:50,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:50,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:52:50,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476502480] [2020-07-20 11:52:50,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:52:50,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:50,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:52:50,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:50,221 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 6 states. [2020-07-20 11:52:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:50,333 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-07-20 11:52:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:52:50,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-20 11:52:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:50,334 INFO L225 Difference]: With dead ends: 108 [2020-07-20 11:52:50,334 INFO L226 Difference]: Without dead ends: 106 [2020-07-20 11:52:50,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:52:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-20 11:52:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 57. [2020-07-20 11:52:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 11:52:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-07-20 11:52:50,342 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 18 [2020-07-20 11:52:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:50,342 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-07-20 11:52:50,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:52:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-07-20 11:52:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:52:50,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:50,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:50,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:50,546 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:50,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1148978332, now seen corresponding path program 1 times [2020-07-20 11:52:50,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:50,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050183567] [2020-07-20 11:52:50,548 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 11:52:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:50,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:52:50,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:50,605 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:50,612 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 11:52:50,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:50,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050183567] [2020-07-20 11:52:50,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:50,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:52:50,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017684105] [2020-07-20 11:52:50,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:52:50,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:50,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:52:50,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:50,616 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 5 states. [2020-07-20 11:52:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:50,683 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-07-20 11:52:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:52:50,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-20 11:52:50,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:50,685 INFO L225 Difference]: With dead ends: 80 [2020-07-20 11:52:50,685 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 11:52:50,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 11:52:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-07-20 11:52:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:52:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-07-20 11:52:50,696 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 18 [2020-07-20 11:52:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:50,701 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-07-20 11:52:50,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:52:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-07-20 11:52:50,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:52:50,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:50,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:50,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:50,903 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1147612912, now seen corresponding path program 1 times [2020-07-20 11:52:50,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:50,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723237608] [2020-07-20 11:52:50,905 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 11:52:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:52:50,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:50,987 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:50,988 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:51,000 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 11:52:51,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:51,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723237608] [2020-07-20 11:52:51,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:51,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:52:51,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998714823] [2020-07-20 11:52:51,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:52:51,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:52:51,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:51,005 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 6 states. [2020-07-20 11:52:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:51,111 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-07-20 11:52:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:52:51,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-20 11:52:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:51,113 INFO L225 Difference]: With dead ends: 97 [2020-07-20 11:52:51,113 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 11:52:51,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:52:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 11:52:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2020-07-20 11:52:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 11:52:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-07-20 11:52:51,120 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 18 [2020-07-20 11:52:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:51,121 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-07-20 11:52:51,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:52:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-07-20 11:52:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:52:51,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:51,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:51,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:51,336 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:51,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1195328162, now seen corresponding path program 1 times [2020-07-20 11:52:51,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:51,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149181592] [2020-07-20 11:52:51,338 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 11:52:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:52:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:51,411 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:51,413 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:51,420 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 11:52:51,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:51,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149181592] [2020-07-20 11:52:51,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:51,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:52:51,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987188949] [2020-07-20 11:52:51,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:52:51,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:52:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:51,427 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 6 states. [2020-07-20 11:52:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:51,524 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-07-20 11:52:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:52:51,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-20 11:52:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:51,526 INFO L225 Difference]: With dead ends: 74 [2020-07-20 11:52:51,526 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 11:52:51,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:52:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 11:52:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-20 11:52:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:52:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-07-20 11:52:51,535 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 18 [2020-07-20 11:52:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:51,535 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-07-20 11:52:51,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:52:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-07-20 11:52:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:52:51,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:51,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:51,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:51,747 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:51,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1258593065, now seen corresponding path program 1 times [2020-07-20 11:52:51,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:51,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481617369] [2020-07-20 11:52:51,751 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 11:52:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:52:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:51,839 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:51,841 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:51,853 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 11:52:51,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:51,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481617369] [2020-07-20 11:52:51,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:51,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:52:51,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762756209] [2020-07-20 11:52:51,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:52:51,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:51,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:52:51,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:51,856 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 6 states. [2020-07-20 11:52:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:52,001 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2020-07-20 11:52:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:52:52,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-07-20 11:52:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:52,002 INFO L225 Difference]: With dead ends: 91 [2020-07-20 11:52:52,002 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 11:52:52,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:52:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 11:52:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2020-07-20 11:52:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:52:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-07-20 11:52:52,011 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 19 [2020-07-20 11:52:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:52,012 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-07-20 11:52:52,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:52:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-07-20 11:52:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:52:52,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:52,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:52,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:52,217 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash -950489901, now seen corresponding path program 1 times [2020-07-20 11:52:52,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:52,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049396723] [2020-07-20 11:52:52,219 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 11:52:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:52,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:52:52,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:52,271 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:52,281 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 11:52:52,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:52,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049396723] [2020-07-20 11:52:52,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:52,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:52:52,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678167899] [2020-07-20 11:52:52,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:52:52,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:52,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:52:52,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:52:52,283 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 6 states. [2020-07-20 11:52:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:52,386 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-07-20 11:52:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:52:52,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 11:52:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:52,387 INFO L225 Difference]: With dead ends: 68 [2020-07-20 11:52:52,387 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 11:52:52,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:52:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 11:52:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-07-20 11:52:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 11:52:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-07-20 11:52:52,393 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 20 [2020-07-20 11:52:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:52,393 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-07-20 11:52:52,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:52:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-07-20 11:52:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:52:52,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:52,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:52,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:52,596 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:52,596 INFO L82 PathProgramCache]: Analyzing trace with hash 599587266, now seen corresponding path program 1 times [2020-07-20 11:52:52,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:52,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675500729] [2020-07-20 11:52:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:52,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:52:52,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:52,642 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:52,650 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 11:52:52,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:52,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675500729] [2020-07-20 11:52:52,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:52,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:52:52,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513881487] [2020-07-20 11:52:52,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:52:52,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:52,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:52:52,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:52:52,652 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 4 states. [2020-07-20 11:52:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:52,699 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-07-20 11:52:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:52:52,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 11:52:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:52,700 INFO L225 Difference]: With dead ends: 65 [2020-07-20 11:52:52,701 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 11:52:52,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:52:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 11:52:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-20 11:52:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 11:52:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-20 11:52:52,706 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 21 [2020-07-20 11:52:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:52,706 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-20 11:52:52,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:52:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-20 11:52:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:52:52,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:52,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:52,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:52,907 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:52,908 INFO L82 PathProgramCache]: Analyzing trace with hash 807498791, now seen corresponding path program 1 times [2020-07-20 11:52:52,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:52,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919806451] [2020-07-20 11:52:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:52,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:52:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:53,018 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:53,023 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:52:53,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:52:53,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:52:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:52:53,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919806451] [2020-07-20 11:52:53,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:52:53,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-07-20 11:52:53,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196207334] [2020-07-20 11:52:53,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:52:53,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:53,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:52:53,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:52:53,101 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-07-20 11:52:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:53,357 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2020-07-20 11:52:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 11:52:53,358 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-20 11:52:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:53,359 INFO L225 Difference]: With dead ends: 108 [2020-07-20 11:52:53,359 INFO L226 Difference]: Without dead ends: 106 [2020-07-20 11:52:53,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:52:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-20 11:52:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 57. [2020-07-20 11:52:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 11:52:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-07-20 11:52:53,367 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 22 [2020-07-20 11:52:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:53,367 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-07-20 11:52:53,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:52:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-07-20 11:52:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:52:53,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:53,368 INFO L422 BasicCegarLoop]: trace histogram [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 11:52:53,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:53,569 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1420576327, now seen corresponding path program 1 times [2020-07-20 11:52:53,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:53,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277714109] [2020-07-20 11:52:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:52:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:53,713 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:53,715 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:53,728 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 11:52:53,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:53,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277714109] [2020-07-20 11:52:53,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:53,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 11:52:53,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950228739] [2020-07-20 11:52:53,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:52:53,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:52:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:52:53,731 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 8 states. [2020-07-20 11:52:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:53,938 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-07-20 11:52:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:52:53,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 11:52:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:53,939 INFO L225 Difference]: With dead ends: 117 [2020-07-20 11:52:53,940 INFO L226 Difference]: Without dead ends: 115 [2020-07-20 11:52:53,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:52:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-20 11:52:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 65. [2020-07-20 11:52:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 11:52:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-07-20 11:52:53,945 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 22 [2020-07-20 11:52:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:53,945 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-07-20 11:52:53,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:52:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-07-20 11:52:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:52:53,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:53,946 INFO L422 BasicCegarLoop]: trace histogram [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 11:52:54,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:54,159 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:54,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:54,160 INFO L82 PathProgramCache]: Analyzing trace with hash 396336034, now seen corresponding path program 1 times [2020-07-20 11:52:54,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:54,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732791762] [2020-07-20 11:52:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:54,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:52:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:54,265 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:54,267 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:54,276 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 11:52:54,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:54,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732791762] [2020-07-20 11:52:54,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:54,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 11:52:54,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260503190] [2020-07-20 11:52:54,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:52:54,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:54,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:52:54,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:52:54,279 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 8 states. [2020-07-20 11:52:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:54,441 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2020-07-20 11:52:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:52:54,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-07-20 11:52:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:54,442 INFO L225 Difference]: With dead ends: 104 [2020-07-20 11:52:54,442 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 11:52:54,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:52:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 11:52:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2020-07-20 11:52:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:52:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-07-20 11:52:54,448 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 23 [2020-07-20 11:52:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:54,448 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-07-20 11:52:54,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:52:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-07-20 11:52:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:52:54,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:54,449 INFO L422 BasicCegarLoop]: trace histogram [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 11:52:54,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:54,661 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 444051284, now seen corresponding path program 1 times [2020-07-20 11:52:54,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:54,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814359750] [2020-07-20 11:52:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:52:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:54,773 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:54,774 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:54,790 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 11:52:54,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:54,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814359750] [2020-07-20 11:52:54,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:54,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 11:52:54,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450594872] [2020-07-20 11:52:54,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:52:54,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:52:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:52:54,792 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 8 states. [2020-07-20 11:52:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:54,926 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-07-20 11:52:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:52:54,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-07-20 11:52:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:54,929 INFO L225 Difference]: With dead ends: 84 [2020-07-20 11:52:54,929 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 11:52:54,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:52:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 11:52:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2020-07-20 11:52:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:52:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-07-20 11:52:54,935 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 23 [2020-07-20 11:52:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:54,935 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-07-20 11:52:54,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:52:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-07-20 11:52:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:52:54,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:54,937 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] [2020-07-20 11:52:55,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:55,149 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:55,149 INFO L82 PathProgramCache]: Analyzing trace with hash -743587193, now seen corresponding path program 1 times [2020-07-20 11:52:55,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:55,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323368120] [2020-07-20 11:52:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:52:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:55,271 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:55,272 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:52:55,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:52:55,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:52:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:52:55,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323368120] [2020-07-20 11:52:55,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:52:55,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-07-20 11:52:55,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001443032] [2020-07-20 11:52:55,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:52:55,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:55,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:52:55,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:52:55,335 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 10 states. [2020-07-20 11:52:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:55,574 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-07-20 11:52:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 11:52:55,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-07-20 11:52:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:55,576 INFO L225 Difference]: With dead ends: 78 [2020-07-20 11:52:55,576 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 11:52:55,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:52:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 11:52:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-07-20 11:52:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 11:52:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2020-07-20 11:52:55,581 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 23 [2020-07-20 11:52:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:55,581 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2020-07-20 11:52:55,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:52:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2020-07-20 11:52:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:52:55,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:55,582 INFO L422 BasicCegarLoop]: trace histogram [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 11:52:55,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:55,783 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash -946140679, now seen corresponding path program 1 times [2020-07-20 11:52:55,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:55,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501750860] [2020-07-20 11:52:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:52:55,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:55,922 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:55,923 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:55,932 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 11:52:55,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:52:55,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501750860] [2020-07-20 11:52:55,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:52:55,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 11:52:55,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952236133] [2020-07-20 11:52:55,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:52:55,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:55,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:52:55,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:52:55,934 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 10 states. [2020-07-20 11:52:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:56,150 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2020-07-20 11:52:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:52:56,151 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 11:52:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:56,152 INFO L225 Difference]: With dead ends: 140 [2020-07-20 11:52:56,152 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 11:52:56,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:52:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 11:52:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 81. [2020-07-20 11:52:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 11:52:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-20 11:52:56,161 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 27 [2020-07-20 11:52:56,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:56,162 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-20 11:52:56,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:52:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-20 11:52:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:52:56,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:56,162 INFO L422 BasicCegarLoop]: trace histogram [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 11:52:56,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:56,377 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:56,378 INFO L82 PathProgramCache]: Analyzing trace with hash -183296883, now seen corresponding path program 1 times [2020-07-20 11:52:56,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:56,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360125996] [2020-07-20 11:52:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:56,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:52:56,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:56,531 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:56,532 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:52:56,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:52:56,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:52:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:52:56,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360125996] [2020-07-20 11:52:56,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:52:56,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2020-07-20 11:52:56,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488796598] [2020-07-20 11:52:56,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:52:56,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:56,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:52:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:52:56,612 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 12 states. [2020-07-20 11:52:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:56,919 INFO L93 Difference]: Finished difference Result 127 states and 145 transitions. [2020-07-20 11:52:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 11:52:56,920 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-07-20 11:52:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:56,921 INFO L225 Difference]: With dead ends: 127 [2020-07-20 11:52:56,921 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 11:52:56,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:52:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 11:52:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-07-20 11:52:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 11:52:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-07-20 11:52:56,929 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 27 [2020-07-20 11:52:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:56,930 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-07-20 11:52:56,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:52:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-07-20 11:52:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:52:56,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:56,931 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 11:52:57,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:57,144 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:57,145 INFO L82 PathProgramCache]: Analyzing trace with hash -135581633, now seen corresponding path program 1 times [2020-07-20 11:52:57,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:57,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445005155] [2020-07-20 11:52:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:52:57,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:57,274 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:57,275 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:52:57,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:52:57,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:52:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:52:57,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445005155] [2020-07-20 11:52:57,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:52:57,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2020-07-20 11:52:57,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705881520] [2020-07-20 11:52:57,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:52:57,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:52:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:52:57,361 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 12 states. [2020-07-20 11:52:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:57,558 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-07-20 11:52:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:52:57,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-07-20 11:52:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:57,560 INFO L225 Difference]: With dead ends: 94 [2020-07-20 11:52:57,560 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 11:52:57,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:52:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 11:52:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-07-20 11:52:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 11:52:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-07-20 11:52:57,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 27 [2020-07-20 11:52:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:57,568 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-07-20 11:52:57,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:52:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-07-20 11:52:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 11:52:57,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:57,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:57,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:57,774 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr16ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:57,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash -868344476, now seen corresponding path program 1 times [2020-07-20 11:52:57,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:57,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963667735] [2020-07-20 11:52:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:52:57,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:57,955 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:52:57,957 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:52:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:52:57,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:52:57,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:52:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:52:58,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963667735] [2020-07-20 11:52:58,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:52:58,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 14 [2020-07-20 11:52:58,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285271276] [2020-07-20 11:52:58,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:52:58,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:52:58,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:52:58,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:52:58,044 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-07-20 11:52:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:58,459 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2020-07-20 11:52:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 11:52:58,459 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-07-20 11:52:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:58,460 INFO L225 Difference]: With dead ends: 141 [2020-07-20 11:52:58,460 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:52:58,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:52:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:52:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:52:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:52:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:52:58,462 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-20 11:52:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:58,462 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:52:58,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:52:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:52:58,463 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:52:58,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:58,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:52:58,888 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-07-20 11:52:59,024 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-07-20 11:52:59,178 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-07-20 11:52:59,364 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-07-20 11:52:59,601 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2020-07-20 11:52:59,913 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 11 [2020-07-20 11:53:00,308 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 13 [2020-07-20 11:53:00,765 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 18 [2020-07-20 11:53:00,769 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:53:00,769 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:53:00,770 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point mainErr3ASSERT_VIOLATIONERROR_FUNCTION(line 83) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point L349(line 349) no Hoare annotation was computed. [2020-07-20 11:53:00,770 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 373) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point L151(lines 151 159) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point L52(lines 52 252) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point L308(line 308) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point L275(lines 275 362) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point mainErr11ASSERT_VIOLATIONERROR_FUNCTION(line 235) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point L69(lines 69 93) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point L185(lines 185 195) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point mainErr6ASSERT_VIOLATIONERROR_FUNCTION(line 141) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point L111(lines 111 202) no Hoare annotation was computed. [2020-07-20 11:53:00,771 INFO L268 CegarLoopResult]: For program point mainErr14ASSERT_VIOLATIONERROR_FUNCTION(line 308) no Hoare annotation was computed. [2020-07-20 11:53:00,772 INFO L268 CegarLoopResult]: For program point L235(line 235) no Hoare annotation was computed. [2020-07-20 11:53:00,772 INFO L264 CegarLoopResult]: At program point L326(lines 30 366) the Hoare annotation is: (let ((.cse0 (<= 1 main_~main__t~0)) (.cse1 (<= 1 main_~__VERIFIER_assert__cond~13))) (or (and (or (and (<= 0 main_~main__t~0) (<= main_~main__t~0 0)) (and (<= main_~main__t~0 main_~main__tagbuf_len~0) .cse0 (<= main_~main__t~0 1) .cse1)) (<= 0 main_~main__tagbuf_len~0) (not (= main_~main__tagbuf_len~0 main_~main__t~0))) (and (< main_~main__t~0 main_~main__tagbuf_len~0) .cse0 (<= 1 main_~__VERIFIER_assert__cond~17) .cse1))) [2020-07-20 11:53:00,772 INFO L264 CegarLoopResult]: At program point L194(lines 58 252) the Hoare annotation is: (and (<= 1 main_~__VERIFIER_assert__cond~1) (<= main_~main__t~0 main_~main__tagbuf_len~0) (<= 1 main_~main__t~0) (<= 1 main_~__VERIFIER_assert__cond~0)) [2020-07-20 11:53:00,772 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-07-20 11:53:00,772 INFO L268 CegarLoopResult]: For program point mainErr5ASSERT_VIOLATIONERROR_FUNCTION(line 125) no Hoare annotation was computed. [2020-07-20 11:53:00,772 INFO L268 CegarLoopResult]: For program point L54(line 54) no Hoare annotation was computed. [2020-07-20 11:53:00,772 INFO L268 CegarLoopResult]: For program point L277(line 277) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L268 CegarLoopResult]: For program point L335(lines 335 358) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 373) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L268 CegarLoopResult]: For program point mainErr13ASSERT_VIOLATIONERROR_FUNCTION(line 296) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L268 CegarLoopResult]: For program point L104(lines 104 208) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L268 CegarLoopResult]: For program point L71(line 71) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L268 CegarLoopResult]: For program point L294(lines 294 316) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 42) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L268 CegarLoopResult]: For program point L30(lines 30 366) no Hoare annotation was computed. [2020-07-20 11:53:00,773 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 373) the Hoare annotation is: true [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point L187(line 187) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point L22(lines 22 367) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point L113(line 113) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point mainErr8ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point mainErr16ASSERT_VIOLATIONERROR_FUNCTION(line 349) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point L287(lines 287 361) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point L221(lines 221 243) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point mainErr7ASSERT_VIOLATIONERROR_FUNCTION(line 153) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point L81(lines 81 91) no Hoare annotation was computed. [2020-07-20 11:53:00,774 INFO L268 CegarLoopResult]: For program point L337(line 337) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point mainErr15ASSERT_VIOLATIONERROR_FUNCTION(line 337) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point L139(lines 139 161) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point L40(lines 40 254) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point L296(line 296) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point mainErr2ASSERT_VIOLATIONERROR_FUNCTION(line 71) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point L123(lines 123 200) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L271 CegarLoopResult]: At program point L313(lines 30 366) the Hoare annotation is: true [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point L214(lines 214 249) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point L173(lines 173 197) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point mainErr10ASSERT_VIOLATIONERROR_FUNCTION(line 223) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point L264(lines 264 364) no Hoare annotation was computed. [2020-07-20 11:53:00,775 INFO L268 CegarLoopResult]: For program point L132(lines 132 199) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L264 CegarLoopResult]: At program point L355(lines 281 362) the Hoare annotation is: (let ((.cse0 (<= 0 main_~main__t~0)) (.cse1 (<= 1 main_~__VERIFIER_assert__cond~13))) (or (and (< main_~main__t~0 main_~main__tagbuf_len~0) .cse0 (<= 1 main_~__VERIFIER_assert__cond~17) .cse1) (and .cse0 (<= main_~main__t~0 0) (<= 0 main_~main__tagbuf_len~0) (not (= main_~main__tagbuf_len~0 main_~main__t~0)) .cse1))) [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 54) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point L223(line 223) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point L347(lines 347 356) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L264 CegarLoopResult]: At program point L248(lines 100 250) the Hoare annotation is: (and (<= 1 main_~__VERIFIER_assert__cond~1) (<= main_~main__t~0 main_~main__tagbuf_len~0) (<= 1 main_~main__t~0) (not (= main_~main__tagbuf_len~0 main_~main__t~0)) (<= 1 main_~__VERIFIER_assert__cond~0)) [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point L306(lines 306 314) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point L141(line 141) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point mainErr9ASSERT_VIOLATIONERROR_FUNCTION(line 187) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point L100(lines 100 250) no Hoare annotation was computed. [2020-07-20 11:53:00,776 INFO L268 CegarLoopResult]: For program point L323(lines 323 360) no Hoare annotation was computed. [2020-07-20 11:53:00,777 INFO L268 CegarLoopResult]: For program point mainErr4ASSERT_VIOLATIONERROR_FUNCTION(line 113) no Hoare annotation was computed. [2020-07-20 11:53:00,777 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-07-20 11:53:00,777 INFO L268 CegarLoopResult]: For program point L18(lines 18 372) no Hoare annotation was computed. [2020-07-20 11:53:00,777 INFO L268 CegarLoopResult]: For program point mainErr12ASSERT_VIOLATIONERROR_FUNCTION(line 277) no Hoare annotation was computed. [2020-07-20 11:53:00,777 INFO L268 CegarLoopResult]: For program point L175(line 175) no Hoare annotation was computed. [2020-07-20 11:53:00,777 INFO L268 CegarLoopResult]: For program point L233(lines 233 241) no Hoare annotation was computed. [2020-07-20 11:53:00,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:53:00 BoogieIcfgContainer [2020-07-20 11:53:00,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:53:00,795 INFO L168 Benchmark]: Toolchain (without parser) took 16508.43 ms. Allocated memory was 138.9 MB in the beginning and 310.9 MB in the end (delta: 172.0 MB). Free memory was 103.3 MB in the beginning and 98.7 MB in the end (delta: 4.5 MB). Peak memory consumption was 182.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:00,796 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:53:00,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.95 ms. Allocated memory is still 138.9 MB. Free memory was 102.8 MB in the beginning and 90.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:00,797 INFO L168 Benchmark]: Boogie Preprocessor took 121.01 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 90.2 MB in the beginning and 176.7 MB in the end (delta: -86.5 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:00,798 INFO L168 Benchmark]: RCFGBuilder took 498.93 ms. Allocated memory is still 199.2 MB. Free memory was 176.7 MB in the beginning and 151.5 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:00,799 INFO L168 Benchmark]: TraceAbstraction took 15570.36 ms. Allocated memory was 199.2 MB in the beginning and 310.9 MB in the end (delta: 111.7 MB). Free memory was 150.8 MB in the beginning and 98.7 MB in the end (delta: 52.1 MB). Peak memory consumption was 169.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:00,801 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.95 ms. Allocated memory is still 138.9 MB. Free memory was 102.8 MB in the beginning and 90.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.01 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 90.2 MB in the beginning and 176.7 MB in the end (delta: -86.5 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 498.93 ms. Allocated memory is still 199.2 MB. Free memory was 176.7 MB in the beginning and 151.5 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15570.36 ms. Allocated memory was 199.2 MB in the beginning and 310.9 MB in the end (delta: 111.7 MB). Free memory was 150.8 MB in the beginning and 98.7 MB in the end (delta: 52.1 MB). Peak memory consumption was 169.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 337]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 349]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 153]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 296]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 187]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 223]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 308]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 277]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 113]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 235]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 71]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 141]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 125]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 83]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 54]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((((0 <= main__t && main__t <= 0) || (((main__t <= main__tagbuf_len && 1 <= main__t) && main__t <= 1) && 1 <= __VERIFIER_assert__cond)) && 0 <= main__tagbuf_len) && !(main__tagbuf_len == main__t)) || (((main__t < main__tagbuf_len && 1 <= main__t) && 1 <= __VERIFIER_assert__cond) && 1 <= __VERIFIER_assert__cond) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: ((1 <= __VERIFIER_assert__cond && main__t <= main__tagbuf_len) && 1 <= main__t) && 1 <= __VERIFIER_assert__cond - InvariantResult [Line: 100]: Loop Invariant Derived loop invariant: (((1 <= __VERIFIER_assert__cond && main__t <= main__tagbuf_len) && 1 <= main__t) && !(main__tagbuf_len == main__t)) && 1 <= __VERIFIER_assert__cond - InvariantResult [Line: 281]: Loop Invariant Derived loop invariant: (((main__t < main__tagbuf_len && 0 <= main__t) && 1 <= __VERIFIER_assert__cond) && 1 <= __VERIFIER_assert__cond) || ((((0 <= main__t && main__t <= 0) && 0 <= main__tagbuf_len) && !(main__tagbuf_len == main__t)) && 1 <= __VERIFIER_assert__cond) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 80 locations, 17 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.3s, OverallIterations: 27, TraceHistogramMax: 2, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1154 SDtfs, 2597 SDslu, 2195 SDs, 0 SdLazy, 2526 SolverSat, 315 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 689 GetRequests, 479 SyntacticMatches, 19 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 622 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 36 NumberOfFragments, 109 HoareAnnotationTreeSize, 9 FomulaSimplifications, 2773163136 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 9 FomulaSimplificationsInter, 64093219 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 523 NumberOfCodeBlocks, 523 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 621 ConstructedInterpolants, 0 QuantifiedInterpolants, 65277 SizeOfPredicates, 105 NumberOfNonLiveVariables, 2813 ConjunctsInSsa, 204 ConjunctsInUnsatCore, 32 InterpolantComputations, 22 PerfectInterpolantSequences, 12/48 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...