/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_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:22:31,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:22:31,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:22:31,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:22:31,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:22:31,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:22:31,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:22:31,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:22:31,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:22:31,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:22:31,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:22:31,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:22:31,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:22:31,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:22:31,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:22:31,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:22:31,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:22:31,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:22:31,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:22:31,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:22:31,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:22:31,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:22:31,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:22:31,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:22:31,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:22:31,661 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 11:22:31,676 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:22:31,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:22:31,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:22:31,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:22:31,678 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:22:31,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:22:31,679 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:22:31,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:22:31,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:22:31,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:22:31,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:22:31,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:22:31,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:22:31,680 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:22:31,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:22:31,681 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:22:31,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:22:31,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:22:31,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:22:31,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:22:31,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:22:31,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:22:31,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:22:31,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:22:31,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:22:31,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:22:31,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:31,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:22:31,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:22:31,683 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 11:22:31,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:22:31,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:22:32,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:22:32,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:22:32,004 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:22:32,005 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-07-20 11:22:32,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d9afb5/93212ddcda95434b9995a37ce43fb179/FLAGdbae13149 [2020-07-20 11:22:32,588 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:22:32,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2020-07-20 11:22:32,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d9afb5/93212ddcda95434b9995a37ce43fb179/FLAGdbae13149 [2020-07-20 11:22:32,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d9afb5/93212ddcda95434b9995a37ce43fb179 [2020-07-20 11:22:32,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:22:32,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:22:32,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:32,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:22:32,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:22:32,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:32" (1/1) ... [2020-07-20 11:22:32,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509fad81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:32, skipping insertion in model container [2020-07-20 11:22:32,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:32" (1/1) ... [2020-07-20 11:22:32,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:22:33,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:22:33,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:33,243 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:22:33,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:33,281 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:22:33,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33 WrapperNode [2020-07-20 11:22:33,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:33,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:22:33,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:22:33,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:22:33,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (1/1) ... [2020-07-20 11:22:33,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (1/1) ... [2020-07-20 11:22:33,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (1/1) ... [2020-07-20 11:22:33,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (1/1) ... [2020-07-20 11:22:33,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (1/1) ... [2020-07-20 11:22:33,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (1/1) ... [2020-07-20 11:22:33,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (1/1) ... [2020-07-20 11:22:33,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:22:33,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:22:33,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:22:33,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:22:33,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (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 11:22:33,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:22:33,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:22:33,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:22:33,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:22:33,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:22:33,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:22:33,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:22:33,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:22:33,801 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:22:33,801 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:22:33,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:33 BoogieIcfgContainer [2020-07-20 11:22:33,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:22:33,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:22:33,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:22:33,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:22:33,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:22:32" (1/3) ... [2020-07-20 11:22:33,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b4d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:33, skipping insertion in model container [2020-07-20 11:22:33,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:33" (2/3) ... [2020-07-20 11:22:33,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b4d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:33, skipping insertion in model container [2020-07-20 11:22:33,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:33" (3/3) ... [2020-07-20 11:22:33,842 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-07-20 11:22:33,853 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:22:33,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:22:33,874 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:22:33,900 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:22:33,901 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:22:33,901 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:22:33,901 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:22:33,901 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:22:33,901 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:22:33,902 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:22:33,902 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:22:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 11:22:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 11:22:33,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:33,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:33,932 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:33,939 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-07-20 11:22:33,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:33,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707170089] [2020-07-20 11:22:33,949 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 11:22:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:34,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:34,067 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 11:22:34,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:34,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707170089] [2020-07-20 11:22:34,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:34,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:34,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926862618] [2020-07-20 11:22:34,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:34,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:34,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:34,093 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-07-20 11:22:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:34,150 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-07-20 11:22:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:34,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 11:22:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:34,164 INFO L225 Difference]: With dead ends: 57 [2020-07-20 11:22:34,164 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:22:34,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 11:22:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:22:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-20 11:22:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:22:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-07-20 11:22:34,211 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-07-20 11:22:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:34,212 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-07-20 11:22:34,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-07-20 11:22:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 11:22:34,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:34,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:34,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:34,430 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:34,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:34,431 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-07-20 11:22:34,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:34,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724939577] [2020-07-20 11:22:34,432 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 11:22:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:34,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:34,492 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 11:22:34,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:34,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724939577] [2020-07-20 11:22:34,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:34,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:34,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921875103] [2020-07-20 11:22:34,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:34,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:34,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:34,497 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-07-20 11:22:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:34,520 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-07-20 11:22:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:34,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 11:22:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:34,523 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:22:34,523 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:22:34,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 11:22:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:22:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-20 11:22:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:22:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-07-20 11:22:34,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-07-20 11:22:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:34,535 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-07-20 11:22:34,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-07-20 11:22:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:22:34,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:34,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:34,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:34,751 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-07-20 11:22:34,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:34,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918239834] [2020-07-20 11:22:34,754 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 11:22:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:34,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:34,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:34,825 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 11:22:34,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:34,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918239834] [2020-07-20 11:22:34,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:34,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:34,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441890899] [2020-07-20 11:22:34,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:34,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:34,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:34,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:34,829 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-07-20 11:22:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:34,860 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-20 11:22:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:34,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 11:22:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:34,867 INFO L225 Difference]: With dead ends: 63 [2020-07-20 11:22:34,867 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 11:22:34,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 11:22:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 11:22:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-20 11:22:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 11:22:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-07-20 11:22:34,875 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-07-20 11:22:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:34,875 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-07-20 11:22:34,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-07-20 11:22:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:22:34,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:34,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:35,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:35,086 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-07-20 11:22:35,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:35,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987388181] [2020-07-20 11:22:35,089 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 11:22:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:35,134 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 11:22:35,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:35,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987388181] [2020-07-20 11:22:35,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:35,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:35,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534079185] [2020-07-20 11:22:35,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:35,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:35,137 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-07-20 11:22:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:35,155 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-07-20 11:22:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:35,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 11:22:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:35,157 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:22:35,157 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 11:22:35,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 11:22:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 11:22:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-07-20 11:22:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 11:22:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-07-20 11:22:35,168 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-07-20 11:22:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:35,168 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-07-20 11:22:35,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-07-20 11:22:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:22:35,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:35,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:35,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:35,379 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-07-20 11:22:35,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:35,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442539208] [2020-07-20 11:22:35,381 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 11:22:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:35,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:35,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:35,431 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 11:22:35,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:35,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442539208] [2020-07-20 11:22:35,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:35,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:35,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065901592] [2020-07-20 11:22:35,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:35,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:35,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:35,436 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-07-20 11:22:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:35,480 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-07-20 11:22:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:35,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 11:22:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:35,487 INFO L225 Difference]: With dead ends: 124 [2020-07-20 11:22:35,487 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 11:22:35,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 11:22:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 11:22:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-20 11:22:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 11:22:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-07-20 11:22:35,512 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-07-20 11:22:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:35,512 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-07-20 11:22:35,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-07-20 11:22:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:22:35,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:35,514 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 11:22:35,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:35,723 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:35,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-07-20 11:22:35,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:35,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779404234] [2020-07-20 11:22:35,724 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 11:22:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:35,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:35,773 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 11:22:35,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:35,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779404234] [2020-07-20 11:22:35,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:35,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:35,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922095154] [2020-07-20 11:22:35,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:35,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:35,777 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-07-20 11:22:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:35,803 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-07-20 11:22:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:35,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 11:22:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:35,805 INFO L225 Difference]: With dead ends: 111 [2020-07-20 11:22:35,806 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 11:22:35,807 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 11:22:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 11:22:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-07-20 11:22:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 11:22:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-07-20 11:22:35,819 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-07-20 11:22:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:35,820 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-07-20 11:22:35,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-07-20 11:22:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:22:35,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:35,835 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 11:22:36,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:36,044 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-07-20 11:22:36,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:36,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952890845] [2020-07-20 11:22:36,046 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 11:22:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:36,099 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 11:22:36,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:36,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952890845] [2020-07-20 11:22:36,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:36,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:36,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038490237] [2020-07-20 11:22:36,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:36,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:36,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:36,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:36,105 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-07-20 11:22:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:36,141 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-07-20 11:22:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:36,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 11:22:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:36,143 INFO L225 Difference]: With dead ends: 132 [2020-07-20 11:22:36,144 INFO L226 Difference]: Without dead ends: 130 [2020-07-20 11:22:36,147 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 11:22:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-20 11:22:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-07-20 11:22:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-20 11:22:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-07-20 11:22:36,170 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-07-20 11:22:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:36,171 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-07-20 11:22:36,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-07-20 11:22:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:22:36,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:36,173 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 11:22:36,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:36,389 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-07-20 11:22:36,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:36,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952088741] [2020-07-20 11:22:36,391 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 11:22:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:36,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:36,427 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 11:22:36,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:36,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952088741] [2020-07-20 11:22:36,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:36,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:36,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092509737] [2020-07-20 11:22:36,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:36,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:36,430 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-07-20 11:22:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:36,454 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-07-20 11:22:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:36,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 11:22:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:36,456 INFO L225 Difference]: With dead ends: 232 [2020-07-20 11:22:36,456 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 11:22:36,457 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 11:22:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 11:22:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-20 11:22:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 11:22:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-07-20 11:22:36,470 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-07-20 11:22:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:36,470 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-07-20 11:22:36,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-07-20 11:22:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:36,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:36,472 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 11:22:36,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:36,684 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:36,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-07-20 11:22:36,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:36,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913860339] [2020-07-20 11:22:36,686 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 11:22:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:36,722 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 11:22:36,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:36,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913860339] [2020-07-20 11:22:36,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:36,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:36,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869741760] [2020-07-20 11:22:36,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:36,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:36,727 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-07-20 11:22:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:36,748 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-07-20 11:22:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:36,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:36,750 INFO L225 Difference]: With dead ends: 204 [2020-07-20 11:22:36,750 INFO L226 Difference]: Without dead ends: 142 [2020-07-20 11:22:36,751 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 11:22:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-20 11:22:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-07-20 11:22:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-20 11:22:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-07-20 11:22:36,762 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-07-20 11:22:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:36,762 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-07-20 11:22:36,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-07-20 11:22:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:36,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:36,764 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 11:22:36,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:36,980 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-07-20 11:22:36,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:36,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321694864] [2020-07-20 11:22:36,982 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 11:22:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:37,015 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 11:22:37,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:37,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321694864] [2020-07-20 11:22:37,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:37,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:37,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626294961] [2020-07-20 11:22:37,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:37,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:37,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:37,020 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-07-20 11:22:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:37,059 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-07-20 11:22:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:37,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:37,062 INFO L225 Difference]: With dead ends: 236 [2020-07-20 11:22:37,062 INFO L226 Difference]: Without dead ends: 234 [2020-07-20 11:22:37,063 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 11:22:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-20 11:22:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-07-20 11:22:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-20 11:22:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-07-20 11:22:37,075 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-07-20 11:22:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:37,076 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-07-20 11:22:37,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-07-20 11:22:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:37,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:37,078 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 11:22:37,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:37,294 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:37,295 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-07-20 11:22:37,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:37,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354445519] [2020-07-20 11:22:37,296 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 11:22:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:37,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:37,345 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 11:22:37,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:37,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354445519] [2020-07-20 11:22:37,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:37,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:37,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552787317] [2020-07-20 11:22:37,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:37,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:37,349 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-07-20 11:22:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:37,372 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-07-20 11:22:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:37,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:37,375 INFO L225 Difference]: With dead ends: 444 [2020-07-20 11:22:37,376 INFO L226 Difference]: Without dead ends: 258 [2020-07-20 11:22:37,377 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 11:22:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-20 11:22:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-20 11:22:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-20 11:22:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-07-20 11:22:37,391 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-07-20 11:22:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:37,391 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-07-20 11:22:37,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-07-20 11:22:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:37,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:37,394 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 11:22:37,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:37,608 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:37,609 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-07-20 11:22:37,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:37,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652419034] [2020-07-20 11:22:37,609 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 11:22:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:37,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:37,640 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 11:22:37,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:37,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652419034] [2020-07-20 11:22:37,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:37,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:37,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096034848] [2020-07-20 11:22:37,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:37,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:37,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:37,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:37,643 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-07-20 11:22:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:37,667 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-07-20 11:22:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:37,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:37,669 INFO L225 Difference]: With dead ends: 384 [2020-07-20 11:22:37,670 INFO L226 Difference]: Without dead ends: 266 [2020-07-20 11:22:37,671 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 11:22:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-20 11:22:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-07-20 11:22:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-20 11:22:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-07-20 11:22:37,682 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-07-20 11:22:37,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:37,683 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-07-20 11:22:37,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-07-20 11:22:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:37,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:37,684 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 11:22:37,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:37,899 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-07-20 11:22:37,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:37,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116203511] [2020-07-20 11:22:37,900 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 11:22:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:37,942 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 11:22:37,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:37,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116203511] [2020-07-20 11:22:37,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:37,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:37,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979054901] [2020-07-20 11:22:37,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:37,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:37,946 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-07-20 11:22:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:37,965 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-07-20 11:22:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:37,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:37,968 INFO L225 Difference]: With dead ends: 426 [2020-07-20 11:22:37,968 INFO L226 Difference]: Without dead ends: 424 [2020-07-20 11:22:37,969 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 11:22:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-07-20 11:22:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-07-20 11:22:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-07-20 11:22:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-07-20 11:22:37,983 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-07-20 11:22:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:37,984 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-07-20 11:22:37,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-07-20 11:22:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:37,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:37,985 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 11:22:38,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:38,200 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:38,200 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-07-20 11:22:38,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:38,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636403628] [2020-07-20 11:22:38,202 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 11:22:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:38,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:38,235 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 11:22:38,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:38,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636403628] [2020-07-20 11:22:38,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:38,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:38,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165643498] [2020-07-20 11:22:38,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:38,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:38,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:38,239 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-07-20 11:22:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:38,273 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-07-20 11:22:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:38,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:38,274 INFO L225 Difference]: With dead ends: 856 [2020-07-20 11:22:38,274 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:22:38,277 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 11:22:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:22:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:22:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:22:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:22:38,278 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-20 11:22:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:38,278 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:22:38,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:22:38,279 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:22:38,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:38,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:22:38,548 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:22:38,548 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:38,549 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:38,549 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:22:38,549 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:22:38,549 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:22:38,549 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-07-20 11:22:38,550 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-07-20 11:22:38,550 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-07-20 11:22:38,550 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,550 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-07-20 11:22:38,550 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,550 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,551 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,551 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,551 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,551 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-20 11:22:38,551 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-20 11:22:38,551 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,552 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-07-20 11:22:38,552 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-07-20 11:22:38,552 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-07-20 11:22:38,552 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-07-20 11:22:38,552 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,553 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-07-20 11:22:38,553 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-20 11:22:38,553 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-07-20 11:22:38,553 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-07-20 11:22:38,553 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 11:22:38,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:22:38 BoogieIcfgContainer [2020-07-20 11:22:38,571 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:22:38,581 INFO L168 Benchmark]: Toolchain (without parser) took 5606.08 ms. Allocated memory was 145.2 MB in the beginning and 235.4 MB in the end (delta: 90.2 MB). Free memory was 102.7 MB in the beginning and 98.0 MB in the end (delta: 4.7 MB). Peak memory consumption was 94.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:38,582 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:22:38,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.76 ms. Allocated memory is still 145.2 MB. Free memory was 102.3 MB in the beginning and 92.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:38,589 INFO L168 Benchmark]: Boogie Preprocessor took 134.52 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.4 MB in the beginning and 180.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:38,590 INFO L168 Benchmark]: RCFGBuilder took 388.26 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 165.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:38,591 INFO L168 Benchmark]: TraceAbstraction took 4749.35 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 165.2 MB in the beginning and 98.0 MB in the end (delta: 67.2 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:38,600 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 145.2 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.76 ms. Allocated memory is still 145.2 MB. Free memory was 102.3 MB in the beginning and 92.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.52 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.4 MB in the beginning and 180.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 388.26 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 165.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4749.35 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 165.2 MB in the beginning and 98.0 MB in the end (delta: 67.2 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 911 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...