/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/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:22:40,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:22:40,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:22:40,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:22:40,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:22:40,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:22:40,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:22:40,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:22:40,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:22:40,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:22:40,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:22:40,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:22:40,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:22:40,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:22:40,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:22:40,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:22:40,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:22:40,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:22:40,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:22:40,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:22:40,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:22:40,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:22:40,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:22:40,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:22:40,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:22:40,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:22:40,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:22:40,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:22:40,912 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 11:22:40,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:22:40,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:22:40,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:22:40,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:22:40,930 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:22:40,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:22:40,931 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:22:40,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:22:40,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:22:40,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:22:40,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:22:40,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:22:40,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:22:40,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:22:40,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:22:40,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:22:40,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:22:40,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:22:40,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:22:40,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:22:40,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:22:40,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:22:40,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:22:40,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:22:40,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:22:40,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:22:40,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:40,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:22:40,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:22:40,936 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 11:22:41,238 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:22:41,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:22:41,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:22:41,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:22:41,259 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:22:41,259 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-07-20 11:22:41,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/501e68921/7d341140e0d74ba4b964692705b70507/FLAG0cbd02e09 [2020-07-20 11:22:41,883 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:22:41,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2020-07-20 11:22:41,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/501e68921/7d341140e0d74ba4b964692705b70507/FLAG0cbd02e09 [2020-07-20 11:22:42,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/501e68921/7d341140e0d74ba4b964692705b70507 [2020-07-20 11:22:42,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:22:42,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:22:42,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:42,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:22:42,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:22:42,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35edd3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42, skipping insertion in model container [2020-07-20 11:22:42,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:22:42,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:22:42,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:42,479 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:22:42,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:42,518 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:22:42,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42 WrapperNode [2020-07-20 11:22:42,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:42,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:22:42,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:22:42,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:22:42,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (1/1) ... [2020-07-20 11:22:42,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:22:42,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:22:42,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:22:42,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:22:42,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:22:42,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:22:42,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:22:42,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:22:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:22:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:22:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:22:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:22:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:22:43,013 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:22:43,014 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:22:43,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:43 BoogieIcfgContainer [2020-07-20 11:22:43,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:22:43,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:22:43,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:22:43,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:22:43,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:22:42" (1/3) ... [2020-07-20 11:22:43,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ff58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:43, skipping insertion in model container [2020-07-20 11:22:43,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:42" (2/3) ... [2020-07-20 11:22:43,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ff58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:43, skipping insertion in model container [2020-07-20 11:22:43,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:43" (3/3) ... [2020-07-20 11:22:43,030 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-07-20 11:22:43,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:22:43,059 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:22:43,082 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:22:43,112 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:22:43,113 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:22:43,113 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:22:43,113 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:22:43,113 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:22:43,114 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:22:43,114 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:22:43,114 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:22:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 11:22:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:22:43,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:43,147 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 11:22:43,147 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:43,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-07-20 11:22:43,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:43,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233824938] [2020-07-20 11:22:43,167 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 11:22:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:43,294 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 11:22:43,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:43,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233824938] [2020-07-20 11:22:43,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:43,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:43,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982935482] [2020-07-20 11:22:43,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:43,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:43,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:43,322 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-20 11:22:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:43,388 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-07-20 11:22:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:43,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 11:22:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:43,404 INFO L225 Difference]: With dead ends: 69 [2020-07-20 11:22:43,404 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 11:22:43,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 11:22:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-07-20 11:22:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 11:22:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-07-20 11:22:43,458 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-07-20 11:22:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:43,459 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-07-20 11:22:43,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-07-20 11:22:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:22:43,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:43,460 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 11:22:43,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:43,680 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:43,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:43,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-07-20 11:22:43,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:43,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346327818] [2020-07-20 11:22:43,681 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 11:22:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:43,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:43,757 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 11:22:43,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:43,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346327818] [2020-07-20 11:22:43,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:43,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:43,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998656746] [2020-07-20 11:22:43,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:43,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:43,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:43,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:43,763 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-07-20 11:22:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:43,790 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-07-20 11:22:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:43,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 11:22:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:43,793 INFO L225 Difference]: With dead ends: 87 [2020-07-20 11:22:43,793 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 11:22:43,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 11:22:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-20 11:22:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 11:22:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-07-20 11:22:43,806 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-07-20 11:22:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:43,806 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-07-20 11:22:43,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-07-20 11:22:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:43,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:43,808 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 11:22:44,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:44,023 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:44,024 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-07-20 11:22:44,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:44,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769604457] [2020-07-20 11:22:44,025 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 11:22:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:44,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:44,080 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 11:22:44,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:44,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769604457] [2020-07-20 11:22:44,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:44,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:44,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142264463] [2020-07-20 11:22:44,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:44,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,083 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-07-20 11:22:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:44,107 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-07-20 11:22:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:44,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:44,109 INFO L225 Difference]: With dead ends: 81 [2020-07-20 11:22:44,110 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:22:44,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:22:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-07-20 11:22:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:22:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-07-20 11:22:44,120 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-07-20 11:22:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:44,120 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-07-20 11:22:44,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-07-20 11:22:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:44,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:44,122 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 11:22:44,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:44,337 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:44,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-07-20 11:22:44,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:44,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48222813] [2020-07-20 11:22:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:22:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:44,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:44,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:44,398 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 11:22:44,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:44,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48222813] [2020-07-20 11:22:44,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:44,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:44,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392312783] [2020-07-20 11:22:44,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:44,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:44,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,405 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-07-20 11:22:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:44,446 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-07-20 11:22:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:44,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:44,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:44,448 INFO L225 Difference]: With dead ends: 100 [2020-07-20 11:22:44,449 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 11:22:44,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 11:22:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-07-20 11:22:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 11:22:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-07-20 11:22:44,481 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-07-20 11:22:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:44,482 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-07-20 11:22:44,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-07-20 11:22:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:44,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:44,487 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 11:22:44,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:44,704 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-07-20 11:22:44,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:44,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219426529] [2020-07-20 11:22:44,706 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 11:22:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:44,764 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 11:22:44,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:44,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219426529] [2020-07-20 11:22:44,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:44,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:44,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620543976] [2020-07-20 11:22:44,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:44,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:44,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:44,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,767 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-07-20 11:22:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:44,798 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-07-20 11:22:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:44,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:44,801 INFO L225 Difference]: With dead ends: 164 [2020-07-20 11:22:44,801 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 11:22:44,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 11:22:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-07-20 11:22:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 11:22:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-07-20 11:22:44,815 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-07-20 11:22:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:44,815 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-07-20 11:22:44,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-07-20 11:22:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:44,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:44,817 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 11:22:45,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:45,029 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-07-20 11:22:45,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:45,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490658135] [2020-07-20 11:22:45,031 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 11:22:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:45,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:45,113 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 11:22:45,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:45,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490658135] [2020-07-20 11:22:45,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:45,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:45,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527639453] [2020-07-20 11:22:45,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:45,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:45,118 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-07-20 11:22:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:45,151 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-07-20 11:22:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:45,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:45,153 INFO L225 Difference]: With dead ends: 147 [2020-07-20 11:22:45,154 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 11:22:45,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 11:22:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-07-20 11:22:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 11:22:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-07-20 11:22:45,172 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-07-20 11:22:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:45,172 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-07-20 11:22:45,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-07-20 11:22:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:45,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:45,174 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 11:22:45,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:45,387 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-07-20 11:22:45,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:45,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191552121] [2020-07-20 11:22:45,389 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 11:22:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:45,434 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 11:22:45,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:45,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191552121] [2020-07-20 11:22:45,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:45,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:45,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45903451] [2020-07-20 11:22:45,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:45,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:45,441 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-07-20 11:22:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:45,460 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-07-20 11:22:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:45,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:45,462 INFO L225 Difference]: With dead ends: 180 [2020-07-20 11:22:45,462 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 11:22:45,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 11:22:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-07-20 11:22:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 11:22:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-07-20 11:22:45,475 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-07-20 11:22:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:45,475 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-07-20 11:22:45,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-07-20 11:22:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:45,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:45,477 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 11:22:45,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:45,685 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:45,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-07-20 11:22:45,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:45,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790772048] [2020-07-20 11:22:45,687 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 11:22:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:45,727 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 11:22:45,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:45,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790772048] [2020-07-20 11:22:45,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:45,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:45,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160290170] [2020-07-20 11:22:45,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:45,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:45,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:45,730 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-07-20 11:22:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:45,759 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-07-20 11:22:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:45,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:45,762 INFO L225 Difference]: With dead ends: 312 [2020-07-20 11:22:45,762 INFO L226 Difference]: Without dead ends: 186 [2020-07-20 11:22:45,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-20 11:22:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-07-20 11:22:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 11:22:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-07-20 11:22:45,776 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-07-20 11:22:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:45,777 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-07-20 11:22:45,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-07-20 11:22:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:45,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:45,779 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 11:22:45,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:45,993 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-07-20 11:22:45,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:45,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163635497] [2020-07-20 11:22:45,995 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 11:22:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:46,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:46,060 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 11:22:46,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:46,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163635497] [2020-07-20 11:22:46,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:46,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:46,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211346087] [2020-07-20 11:22:46,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:46,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:46,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:46,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:46,063 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-07-20 11:22:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:46,092 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-07-20 11:22:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:46,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:46,095 INFO L225 Difference]: With dead ends: 276 [2020-07-20 11:22:46,096 INFO L226 Difference]: Without dead ends: 190 [2020-07-20 11:22:46,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-20 11:22:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-07-20 11:22:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-20 11:22:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-07-20 11:22:46,131 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-07-20 11:22:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:46,135 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-07-20 11:22:46,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-07-20 11:22:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:46,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:46,143 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 11:22:46,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:46,358 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-07-20 11:22:46,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:46,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267484007] [2020-07-20 11:22:46,360 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 11:22:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:46,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:46,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:46,397 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 11:22:46,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:46,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267484007] [2020-07-20 11:22:46,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:46,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:46,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210543251] [2020-07-20 11:22:46,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:46,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:46,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:46,400 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-07-20 11:22:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:46,434 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-07-20 11:22:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:46,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:46,437 INFO L225 Difference]: With dead ends: 332 [2020-07-20 11:22:46,437 INFO L226 Difference]: Without dead ends: 330 [2020-07-20 11:22:46,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-20 11:22:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-07-20 11:22:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-20 11:22:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-07-20 11:22:46,449 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-07-20 11:22:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:46,450 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-07-20 11:22:46,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-07-20 11:22:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:46,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:46,452 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 11:22:46,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:46,668 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-07-20 11:22:46,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:46,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457207328] [2020-07-20 11:22:46,670 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 11:22:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:46,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:46,720 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 11:22:46,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:46,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457207328] [2020-07-20 11:22:46,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:46,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:46,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910827673] [2020-07-20 11:22:46,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:46,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:46,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:46,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:46,723 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-07-20 11:22:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:46,759 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-07-20 11:22:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:46,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:46,762 INFO L225 Difference]: With dead ends: 604 [2020-07-20 11:22:46,763 INFO L226 Difference]: Without dead ends: 354 [2020-07-20 11:22:46,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-07-20 11:22:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-07-20 11:22:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-20 11:22:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-07-20 11:22:46,779 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-07-20 11:22:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:46,779 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-07-20 11:22:46,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-07-20 11:22:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:46,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:46,781 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 11:22:46,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:46,991 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:46,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-07-20 11:22:46,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:46,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828874771] [2020-07-20 11:22:46,993 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 11:22:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:47,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:47,042 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 11:22:47,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:47,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828874771] [2020-07-20 11:22:47,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:47,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:47,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495924277] [2020-07-20 11:22:47,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:47,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:47,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:47,045 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-07-20 11:22:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:47,074 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-07-20 11:22:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:47,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:47,077 INFO L225 Difference]: With dead ends: 528 [2020-07-20 11:22:47,077 INFO L226 Difference]: Without dead ends: 362 [2020-07-20 11:22:47,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-07-20 11:22:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-07-20 11:22:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-20 11:22:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-07-20 11:22:47,092 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-07-20 11:22:47,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:47,095 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-07-20 11:22:47,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-07-20 11:22:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:47,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:47,098 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 11:22:47,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:47,308 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:47,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-07-20 11:22:47,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:47,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172030354] [2020-07-20 11:22:47,310 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 11:22:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:47,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:47,355 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 11:22:47,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:47,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172030354] [2020-07-20 11:22:47,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:47,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:47,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274802771] [2020-07-20 11:22:47,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:47,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:47,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:47,359 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-07-20 11:22:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:47,382 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-07-20 11:22:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:47,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:47,387 INFO L225 Difference]: With dead ends: 620 [2020-07-20 11:22:47,387 INFO L226 Difference]: Without dead ends: 618 [2020-07-20 11:22:47,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-07-20 11:22:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-07-20 11:22:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-07-20 11:22:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-07-20 11:22:47,408 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-07-20 11:22:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:47,408 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-07-20 11:22:47,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-07-20 11:22:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:47,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:47,410 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 11:22:47,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:47,626 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-07-20 11:22:47,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:47,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568984528] [2020-07-20 11:22:47,628 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 11:22:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:47,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:47,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:47,672 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 11:22:47,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:47,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568984528] [2020-07-20 11:22:47,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:47,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:47,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615188344] [2020-07-20 11:22:47,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:47,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:47,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:47,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:47,675 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-07-20 11:22:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:47,722 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-07-20 11:22:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:47,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:47,728 INFO L225 Difference]: With dead ends: 1180 [2020-07-20 11:22:47,728 INFO L226 Difference]: Without dead ends: 682 [2020-07-20 11:22:47,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-07-20 11:22:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-07-20 11:22:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-07-20 11:22:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-07-20 11:22:47,757 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-07-20 11:22:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:47,757 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-07-20 11:22:47,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:47,758 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-07-20 11:22:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:47,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:47,761 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 11:22:47,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:47,976 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-07-20 11:22:47,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:47,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174397425] [2020-07-20 11:22:47,978 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 11:22:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:48,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:48,055 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 11:22:48,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:48,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174397425] [2020-07-20 11:22:48,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:48,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:48,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300278732] [2020-07-20 11:22:48,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:48,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:48,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:48,066 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-07-20 11:22:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:48,101 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-07-20 11:22:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:48,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:48,108 INFO L225 Difference]: With dead ends: 1020 [2020-07-20 11:22:48,108 INFO L226 Difference]: Without dead ends: 698 [2020-07-20 11:22:48,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-07-20 11:22:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-07-20 11:22:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-07-20 11:22:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-07-20 11:22:48,142 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-07-20 11:22:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:48,142 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-07-20 11:22:48,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-07-20 11:22:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:48,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:48,145 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 11:22:48,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:48,359 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:48,360 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-07-20 11:22:48,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:48,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194401275] [2020-07-20 11:22:48,361 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 11:22:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:48,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:48,421 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 11:22:48,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:48,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194401275] [2020-07-20 11:22:48,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:48,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:48,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873379624] [2020-07-20 11:22:48,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:48,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:48,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:48,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:48,425 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-07-20 11:22:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:48,462 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-07-20 11:22:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:48,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:48,469 INFO L225 Difference]: With dead ends: 1164 [2020-07-20 11:22:48,470 INFO L226 Difference]: Without dead ends: 1162 [2020-07-20 11:22:48,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-07-20 11:22:48,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-07-20 11:22:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-07-20 11:22:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-07-20 11:22:48,512 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-07-20 11:22:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:48,512 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-07-20 11:22:48,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-07-20 11:22:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:48,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:48,516 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 11:22:48,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:48,729 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-07-20 11:22:48,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:48,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808102575] [2020-07-20 11:22:48,730 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 11:22:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:48,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:48,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:48,767 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 11:22:48,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:48,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808102575] [2020-07-20 11:22:48,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:48,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:48,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697694378] [2020-07-20 11:22:48,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:48,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:48,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:48,770 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-07-20 11:22:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:48,807 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-07-20 11:22:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:48,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:48,814 INFO L225 Difference]: With dead ends: 2316 [2020-07-20 11:22:48,814 INFO L226 Difference]: Without dead ends: 1322 [2020-07-20 11:22:48,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-07-20 11:22:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-07-20 11:22:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-07-20 11:22:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-07-20 11:22:48,866 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-07-20 11:22:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:48,866 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-07-20 11:22:48,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-07-20 11:22:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:48,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:48,869 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 11:22:49,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:49,086 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:49,087 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-07-20 11:22:49,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:49,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214662247] [2020-07-20 11:22:49,087 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 11:22:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:49,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:49,126 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 11:22:49,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:49,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214662247] [2020-07-20 11:22:49,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:49,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:49,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548519545] [2020-07-20 11:22:49,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:49,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:49,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:49,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:49,129 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-07-20 11:22:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:49,164 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-07-20 11:22:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:49,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:49,172 INFO L225 Difference]: With dead ends: 1980 [2020-07-20 11:22:49,172 INFO L226 Difference]: Without dead ends: 1354 [2020-07-20 11:22:49,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-07-20 11:22:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-07-20 11:22:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-07-20 11:22:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-07-20 11:22:49,221 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-07-20 11:22:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:49,221 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-07-20 11:22:49,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-07-20 11:22:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:49,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:49,224 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 11:22:49,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:49,439 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-07-20 11:22:49,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:49,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203827543] [2020-07-20 11:22:49,440 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 11:22:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:49,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:49,482 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 11:22:49,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:49,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203827543] [2020-07-20 11:22:49,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:49,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:49,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056797323] [2020-07-20 11:22:49,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:49,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:49,485 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-07-20 11:22:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:49,552 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-07-20 11:22:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:49,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:49,563 INFO L225 Difference]: With dead ends: 2186 [2020-07-20 11:22:49,563 INFO L226 Difference]: Without dead ends: 2184 [2020-07-20 11:22:49,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-07-20 11:22:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-07-20 11:22:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-07-20 11:22:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-07-20 11:22:49,625 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-07-20 11:22:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:49,626 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-07-20 11:22:49,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-07-20 11:22:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:49,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:49,630 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 11:22:49,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:49,844 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:49,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-07-20 11:22:49,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:49,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027260810] [2020-07-20 11:22:49,846 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 11:22:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:49,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:49,890 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 11:22:49,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:49,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027260810] [2020-07-20 11:22:49,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:49,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:49,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25843522] [2020-07-20 11:22:49,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:49,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:49,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:49,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:49,893 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-07-20 11:22:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:49,965 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-07-20 11:22:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:49,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:49,966 INFO L225 Difference]: With dead ends: 4552 [2020-07-20 11:22:49,967 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:22:49,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:22:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:22:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:22:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:22:49,977 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-07-20 11:22:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:49,978 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:22:49,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:22:49,978 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:22:50,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:50,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:22:50,256 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:22:50,256 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:50,257 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:50,257 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:22:50,257 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:22:50,257 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:22:50,257 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-07-20 11:22:50,257 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-07-20 11:22:50,257 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,257 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-07-20 11:22:50,258 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-07-20 11:22:50,258 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-07-20 11:22:50,258 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-07-20 11:22:50,258 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-07-20 11:22:50,258 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,258 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-07-20 11:22:50,258 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,259 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,259 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-07-20 11:22:50,259 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,259 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-20 11:22:50,259 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,259 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,259 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-07-20 11:22:50,259 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-07-20 11:22:50,259 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-07-20 11:22:50,260 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,260 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,260 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,260 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-07-20 11:22:50,260 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,260 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-07-20 11:22:50,260 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-07-20 11:22:50,260 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,261 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-07-20 11:22:50,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:22:50 BoogieIcfgContainer [2020-07-20 11:22:50,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:22:50,277 INFO L168 Benchmark]: Toolchain (without parser) took 8036.03 ms. Allocated memory was 135.8 MB in the beginning and 253.2 MB in the end (delta: 117.4 MB). Free memory was 100.2 MB in the beginning and 164.9 MB in the end (delta: -64.7 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:50,277 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 135.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:22:50,278 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.04 ms. Allocated memory is still 135.8 MB. Free memory was 99.8 MB in the beginning and 89.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:50,279 INFO L168 Benchmark]: Boogie Preprocessor took 149.07 ms. Allocated memory was 135.8 MB in the beginning and 200.3 MB in the end (delta: 64.5 MB). Free memory was 89.5 MB in the beginning and 178.3 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:50,280 INFO L168 Benchmark]: RCFGBuilder took 351.96 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 160.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:50,283 INFO L168 Benchmark]: TraceAbstraction took 7251.78 ms. Allocated memory was 200.3 MB in the beginning and 253.2 MB in the end (delta: 53.0 MB). Free memory was 160.6 MB in the beginning and 164.9 MB in the end (delta: -4.2 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:50,286 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 135.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.04 ms. Allocated memory is still 135.8 MB. Free memory was 99.8 MB in the beginning and 89.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.07 ms. Allocated memory was 135.8 MB in the beginning and 200.3 MB in the end (delta: 64.5 MB). Free memory was 89.5 MB in the beginning and 178.3 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.96 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 160.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7251.78 ms. Allocated memory was 200.3 MB in the beginning and 253.2 MB in the end (delta: 53.0 MB). Free memory was 160.6 MB in the beginning and 164.9 MB in the end (delta: -4.2 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.0s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 383 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1682 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 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...