/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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:22:48,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:22:48,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:22:48,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:22:48,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:22:48,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:22:48,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:22:48,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:22:48,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:22:48,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:22:48,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:22:48,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:22:48,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:22:48,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:22:48,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:22:48,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:22:48,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:22:48,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:22:48,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:22:48,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:22:48,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:22:48,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:22:48,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:22:48,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:22:48,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:22:48,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:22:48,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:22:48,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:22:48,188 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 11:22:48,219 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:22:48,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:22:48,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:22:48,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:22:48,222 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:22:48,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:22:48,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:22:48,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:22:48,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:22:48,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:22:48,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:22:48,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:22:48,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:22:48,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:22:48,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:22:48,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:22:48,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:22:48,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:22:48,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:22:48,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:22:48,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:22:48,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:22:48,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:22:48,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:22:48,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:22:48,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:22:48,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:48,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:22:48,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:22:48,228 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 11:22:48,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:22:48,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:22:48,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:22:48,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:22:48,602 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:22:48,605 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-07-20 11:22:48,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/129a05d71/4b0cc2f9718942a18301789a3a1373ac/FLAG5898cfb71 [2020-07-20 11:22:49,317 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:22:49,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2020-07-20 11:22:49,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/129a05d71/4b0cc2f9718942a18301789a3a1373ac/FLAG5898cfb71 [2020-07-20 11:22:49,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/129a05d71/4b0cc2f9718942a18301789a3a1373ac [2020-07-20 11:22:49,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:22:49,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:22:49,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:49,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:22:49,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:22:49,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:49,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b8f7a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49, skipping insertion in model container [2020-07-20 11:22:49,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:49,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:22:49,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:22:49,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:49,852 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:22:49,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:49,896 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:22:49,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49 WrapperNode [2020-07-20 11:22:49,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:49,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:22:49,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:22:49,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:22:49,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:49,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:50,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:50,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:50,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:50,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:50,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (1/1) ... [2020-07-20 11:22:50,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:22:50,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:22:50,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:22:50,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:22:50,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (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 11:22:50,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:22:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:22:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:22:50,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:22:50,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:22:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:22:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:22:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:22:50,458 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:22:50,459 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:22:50,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:50 BoogieIcfgContainer [2020-07-20 11:22:50,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:22:50,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:22:50,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:22:50,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:22:50,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:22:49" (1/3) ... [2020-07-20 11:22:50,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195209ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:50, skipping insertion in model container [2020-07-20 11:22:50,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:49" (2/3) ... [2020-07-20 11:22:50,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195209ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:50, skipping insertion in model container [2020-07-20 11:22:50,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:50" (3/3) ... [2020-07-20 11:22:50,481 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-07-20 11:22:50,505 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:22:50,515 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:22:50,540 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:22:50,583 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:22:50,583 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:22:50,584 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:22:50,584 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:22:50,584 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:22:50,585 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:22:50,585 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:22:50,585 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:22:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-20 11:22:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:50,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:50,627 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 11:22:50,627 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-07-20 11:22:50,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:50,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114814236] [2020-07-20 11:22:50,652 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 11:22:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:50,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:50,849 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 11:22:50,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:50,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114814236] [2020-07-20 11:22:50,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:50,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:50,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211825332] [2020-07-20 11:22:50,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:50,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:50,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:50,875 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-07-20 11:22:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:50,951 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-07-20 11:22:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:50,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:50,969 INFO L225 Difference]: With dead ends: 75 [2020-07-20 11:22:50,969 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 11:22:50,974 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 11:22:50,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 11:22:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-20 11:22:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 11:22:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-07-20 11:22:51,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-07-20 11:22:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:51,031 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-07-20 11:22:51,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-07-20 11:22:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:51,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:51,033 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 11:22:51,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:51,249 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:51,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-07-20 11:22:51,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:51,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988489670] [2020-07-20 11:22:51,252 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 11:22:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:51,352 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 11:22:51,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:51,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988489670] [2020-07-20 11:22:51,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:51,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:51,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715383075] [2020-07-20 11:22:51,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:51,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:51,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:51,359 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-07-20 11:22:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:51,391 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-07-20 11:22:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:51,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:51,394 INFO L225 Difference]: With dead ends: 97 [2020-07-20 11:22:51,395 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 11:22:51,397 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 11:22:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 11:22:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-07-20 11:22:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 11:22:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-07-20 11:22:51,409 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-07-20 11:22:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:51,410 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-07-20 11:22:51,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-07-20 11:22:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:51,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:51,412 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 11:22:51,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:51,628 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:51,630 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-07-20 11:22:51,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:51,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328143690] [2020-07-20 11:22:51,632 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 11:22:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:51,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:51,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:51,717 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 11:22:51,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:51,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328143690] [2020-07-20 11:22:51,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:51,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:51,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741075456] [2020-07-20 11:22:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:51,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:51,721 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-07-20 11:22:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:51,748 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-07-20 11:22:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:51,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:51,751 INFO L225 Difference]: With dead ends: 90 [2020-07-20 11:22:51,751 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 11:22:51,754 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 11:22:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 11:22:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-20 11:22:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 11:22:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-07-20 11:22:51,775 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-07-20 11:22:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:51,776 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-07-20 11:22:51,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-07-20 11:22:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:51,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:51,777 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 11:22:51,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:51,979 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:51,979 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-07-20 11:22:51,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:51,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393626577] [2020-07-20 11:22:51,980 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 11:22:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:52,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:52,044 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 11:22:52,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:52,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393626577] [2020-07-20 11:22:52,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:52,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:52,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649315173] [2020-07-20 11:22:52,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:52,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:52,048 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-07-20 11:22:52,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:52,073 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-07-20 11:22:52,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:52,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:52,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:52,077 INFO L225 Difference]: With dead ends: 112 [2020-07-20 11:22:52,077 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 11:22:52,078 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 11:22:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 11:22:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-20 11:22:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 11:22:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-07-20 11:22:52,091 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-07-20 11:22:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:52,091 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-07-20 11:22:52,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-07-20 11:22:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:52,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:52,094 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 11:22:52,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:52,309 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:52,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-07-20 11:22:52,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:52,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735123603] [2020-07-20 11:22:52,311 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 11:22:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:52,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:52,369 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 11:22:52,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:52,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735123603] [2020-07-20 11:22:52,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:52,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:52,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778048070] [2020-07-20 11:22:52,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:52,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:52,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:52,373 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-07-20 11:22:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:52,412 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-07-20 11:22:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:52,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:52,414 INFO L225 Difference]: With dead ends: 184 [2020-07-20 11:22:52,415 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 11:22:52,416 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 11:22:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 11:22:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-07-20 11:22:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-20 11:22:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-07-20 11:22:52,430 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-07-20 11:22:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:52,431 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-07-20 11:22:52,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-07-20 11:22:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:52,432 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:52,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:52,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:52,649 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:52,650 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-07-20 11:22:52,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:52,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549065200] [2020-07-20 11:22:52,652 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 11:22:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:52,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:52,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:52,731 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 11:22:52,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:52,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549065200] [2020-07-20 11:22:52,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:52,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:52,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547121613] [2020-07-20 11:22:52,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:52,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:52,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:52,734 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-07-20 11:22:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:52,756 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-07-20 11:22:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:52,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:52,759 INFO L225 Difference]: With dead ends: 165 [2020-07-20 11:22:52,759 INFO L226 Difference]: Without dead ends: 114 [2020-07-20 11:22:52,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-20 11:22:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-07-20 11:22:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 11:22:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-07-20 11:22:52,773 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-07-20 11:22:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:52,773 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-07-20 11:22:52,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-07-20 11:22:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:52,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:52,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:52,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:52,980 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-07-20 11:22:52,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:52,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441068229] [2020-07-20 11:22:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:22:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:53,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:53,036 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 11:22:53,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:53,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441068229] [2020-07-20 11:22:53,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:53,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:53,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682491941] [2020-07-20 11:22:53,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:53,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:53,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:53,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:53,040 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-07-20 11:22:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:53,069 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-07-20 11:22:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:53,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:53,072 INFO L225 Difference]: With dead ends: 204 [2020-07-20 11:22:53,072 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 11:22:53,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 11:22:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-07-20 11:22:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 11:22:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-07-20 11:22:53,092 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-07-20 11:22:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:53,092 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-07-20 11:22:53,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-07-20 11:22:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:53,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:53,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:53,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:53,310 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-07-20 11:22:53,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:53,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435410762] [2020-07-20 11:22:53,312 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 11:22:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:53,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:53,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:53,371 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 11:22:53,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:53,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435410762] [2020-07-20 11:22:53,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:53,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:53,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832354394] [2020-07-20 11:22:53,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:53,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:53,376 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-07-20 11:22:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:53,420 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-07-20 11:22:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:53,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:53,425 INFO L225 Difference]: With dead ends: 352 [2020-07-20 11:22:53,425 INFO L226 Difference]: Without dead ends: 210 [2020-07-20 11:22:53,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-20 11:22:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-07-20 11:22:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-20 11:22:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-07-20 11:22:53,472 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-07-20 11:22:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:53,473 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-07-20 11:22:53,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-07-20 11:22:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:53,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:53,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:53,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:53,690 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:53,691 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-07-20 11:22:53,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:53,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116863279] [2020-07-20 11:22:53,692 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 11:22:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:53,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:53,734 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 11:22:53,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:53,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116863279] [2020-07-20 11:22:53,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:53,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:53,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839578444] [2020-07-20 11:22:53,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:53,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:53,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:53,738 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-07-20 11:22:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:53,775 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-07-20 11:22:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:53,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:53,778 INFO L225 Difference]: With dead ends: 312 [2020-07-20 11:22:53,778 INFO L226 Difference]: Without dead ends: 214 [2020-07-20 11:22:53,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-20 11:22:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-07-20 11:22:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-20 11:22:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-07-20 11:22:53,796 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-07-20 11:22:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:53,797 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-07-20 11:22:53,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-07-20 11:22:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:53,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:53,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:54,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:54,014 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-07-20 11:22:54,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:54,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355708660] [2020-07-20 11:22:54,016 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 11:22:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:54,067 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 11:22:54,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:54,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355708660] [2020-07-20 11:22:54,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:54,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:54,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200300639] [2020-07-20 11:22:54,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:54,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:54,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:54,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:54,071 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-07-20 11:22:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:54,121 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-07-20 11:22:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:54,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:54,128 INFO L225 Difference]: With dead ends: 380 [2020-07-20 11:22:54,129 INFO L226 Difference]: Without dead ends: 378 [2020-07-20 11:22:54,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:54,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-07-20 11:22:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-07-20 11:22:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-07-20 11:22:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-07-20 11:22:54,152 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-07-20 11:22:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:54,153 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-07-20 11:22:54,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-07-20 11:22:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:54,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:54,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:54,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:54,378 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:54,379 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-07-20 11:22:54,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:54,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066601951] [2020-07-20 11:22:54,380 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 11:22:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:54,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:54,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:54,463 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 11:22:54,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:54,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066601951] [2020-07-20 11:22:54,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:54,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:54,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225028830] [2020-07-20 11:22:54,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:54,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:54,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:54,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:54,466 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-07-20 11:22:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:54,502 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-07-20 11:22:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:54,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:54,506 INFO L225 Difference]: With dead ends: 684 [2020-07-20 11:22:54,507 INFO L226 Difference]: Without dead ends: 402 [2020-07-20 11:22:54,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-07-20 11:22:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-07-20 11:22:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-07-20 11:22:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-07-20 11:22:54,546 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-07-20 11:22:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:54,546 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-07-20 11:22:54,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-07-20 11:22:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:54,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:54,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:54,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:54,768 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:54,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-07-20 11:22:54,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:54,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483838829] [2020-07-20 11:22:54,770 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 11:22:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:54,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:54,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:54,816 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 11:22:54,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:54,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483838829] [2020-07-20 11:22:54,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:54,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:54,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754756381] [2020-07-20 11:22:54,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:54,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:54,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:54,819 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-07-20 11:22:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:54,852 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-07-20 11:22:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:54,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:54,858 INFO L225 Difference]: With dead ends: 600 [2020-07-20 11:22:54,858 INFO L226 Difference]: Without dead ends: 410 [2020-07-20 11:22:54,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-20 11:22:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-07-20 11:22:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-07-20 11:22:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-07-20 11:22:54,882 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-07-20 11:22:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:54,886 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-07-20 11:22:54,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-07-20 11:22:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:54,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:54,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:55,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:55,109 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:55,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:55,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-07-20 11:22:55,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:55,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323361213] [2020-07-20 11:22:55,111 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 11:22:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:55,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:55,157 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 11:22:55,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:55,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323361213] [2020-07-20 11:22:55,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:55,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:55,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955982628] [2020-07-20 11:22:55,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:55,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:55,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:55,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:55,161 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-07-20 11:22:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:55,197 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-07-20 11:22:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:55,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:55,206 INFO L225 Difference]: With dead ends: 716 [2020-07-20 11:22:55,206 INFO L226 Difference]: Without dead ends: 714 [2020-07-20 11:22:55,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-07-20 11:22:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-07-20 11:22:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-20 11:22:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-07-20 11:22:55,235 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-07-20 11:22:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:55,235 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-07-20 11:22:55,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-07-20 11:22:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:55,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:55,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:55,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:55,454 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-07-20 11:22:55,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:55,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286435020] [2020-07-20 11:22:55,457 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 11:22:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:55,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:55,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:55,517 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 11:22:55,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:55,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286435020] [2020-07-20 11:22:55,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:55,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:55,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582157638] [2020-07-20 11:22:55,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:55,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:55,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:55,521 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-07-20 11:22:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:55,562 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-07-20 11:22:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:55,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:55,568 INFO L225 Difference]: With dead ends: 1340 [2020-07-20 11:22:55,568 INFO L226 Difference]: Without dead ends: 778 [2020-07-20 11:22:55,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-07-20 11:22:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-07-20 11:22:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-20 11:22:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-07-20 11:22:55,601 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-07-20 11:22:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:55,601 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-07-20 11:22:55,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:55,602 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-07-20 11:22:55,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:55,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:55,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:55,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:55,819 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:55,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:55,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-07-20 11:22:55,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:55,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886708818] [2020-07-20 11:22:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:55,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:55,870 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 11:22:55,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:55,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886708818] [2020-07-20 11:22:55,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:55,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:55,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420703660] [2020-07-20 11:22:55,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:55,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:55,874 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-07-20 11:22:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:55,903 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-07-20 11:22:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:55,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:55,909 INFO L225 Difference]: With dead ends: 1164 [2020-07-20 11:22:55,909 INFO L226 Difference]: Without dead ends: 794 [2020-07-20 11:22:55,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:55,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-07-20 11:22:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-07-20 11:22:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-07-20 11:22:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-07-20 11:22:55,945 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-07-20 11:22:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:55,945 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-07-20 11:22:55,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:55,946 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-07-20 11:22:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:55,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:55,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:56,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:56,162 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-07-20 11:22:56,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:56,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909643204] [2020-07-20 11:22:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:56,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:56,213 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 11:22:56,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:56,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909643204] [2020-07-20 11:22:56,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:56,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:56,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584158301] [2020-07-20 11:22:56,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:56,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:56,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:56,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:56,220 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-07-20 11:22:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:56,267 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-07-20 11:22:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:56,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:56,277 INFO L225 Difference]: With dead ends: 1356 [2020-07-20 11:22:56,277 INFO L226 Difference]: Without dead ends: 1354 [2020-07-20 11:22:56,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-07-20 11:22:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-07-20 11:22:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-07-20 11:22:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-07-20 11:22:56,332 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-07-20 11:22:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:56,332 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-07-20 11:22:56,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-07-20 11:22:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:56,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:56,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:56,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:56,550 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-07-20 11:22:56,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:56,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305528770] [2020-07-20 11:22:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:56,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:56,624 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 11:22:56,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:56,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305528770] [2020-07-20 11:22:56,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:56,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:56,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355370617] [2020-07-20 11:22:56,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:56,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:56,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:56,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:56,632 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-07-20 11:22:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:56,697 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-07-20 11:22:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:56,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:56,708 INFO L225 Difference]: With dead ends: 2636 [2020-07-20 11:22:56,709 INFO L226 Difference]: Without dead ends: 1514 [2020-07-20 11:22:56,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-07-20 11:22:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-07-20 11:22:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-07-20 11:22:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-07-20 11:22:56,791 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-07-20 11:22:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:56,793 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-07-20 11:22:56,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-07-20 11:22:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:22:56,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:56,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:57,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:57,014 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-07-20 11:22:57,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:57,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030346900] [2020-07-20 11:22:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:57,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:57,070 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 11:22:57,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:57,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030346900] [2020-07-20 11:22:57,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:57,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:57,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205874021] [2020-07-20 11:22:57,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:57,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:57,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:57,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:57,076 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-07-20 11:22:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:57,128 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-07-20 11:22:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:57,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 11:22:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:57,138 INFO L225 Difference]: With dead ends: 2268 [2020-07-20 11:22:57,138 INFO L226 Difference]: Without dead ends: 1546 [2020-07-20 11:22:57,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 11:22:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-07-20 11:22:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-07-20 11:22:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-20 11:22:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-07-20 11:22:57,235 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-07-20 11:22:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:57,235 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-07-20 11:22:57,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-07-20 11:22:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:22:57,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:57,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:57,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:57,453 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-07-20 11:22:57,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:57,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609363567] [2020-07-20 11:22:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:57,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:57,503 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 11:22:57,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:57,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609363567] [2020-07-20 11:22:57,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:57,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:57,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808882909] [2020-07-20 11:22:57,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:57,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:57,508 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-07-20 11:22:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:57,580 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-07-20 11:22:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:57,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 11:22:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:57,599 INFO L225 Difference]: With dead ends: 2572 [2020-07-20 11:22:57,599 INFO L226 Difference]: Without dead ends: 2570 [2020-07-20 11:22:57,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 11:22:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-07-20 11:22:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-07-20 11:22:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-07-20 11:22:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-07-20 11:22:57,710 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-07-20 11:22:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:57,710 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-07-20 11:22:57,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-07-20 11:22:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:22:57,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:57,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:57,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:57,933 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-07-20 11:22:57,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:57,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915293505] [2020-07-20 11:22:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:57,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:57,979 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 11:22:57,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:57,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915293505] [2020-07-20 11:22:57,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:57,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:57,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836366248] [2020-07-20 11:22:57,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:57,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:57,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:57,982 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-07-20 11:22:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:58,057 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-07-20 11:22:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:58,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 11:22:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:58,076 INFO L225 Difference]: With dead ends: 5196 [2020-07-20 11:22:58,077 INFO L226 Difference]: Without dead ends: 2954 [2020-07-20 11:22:58,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 11:22:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-07-20 11:22:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-07-20 11:22:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-07-20 11:22:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-07-20 11:22:58,189 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-07-20 11:22:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:58,190 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-07-20 11:22:58,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-07-20 11:22:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:22:58,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:58,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:58,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:58,411 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-07-20 11:22:58,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:58,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145843353] [2020-07-20 11:22:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:58,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:58,456 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 11:22:58,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:58,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145843353] [2020-07-20 11:22:58,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:58,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:58,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808028487] [2020-07-20 11:22:58,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:58,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:58,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:58,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:58,460 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-07-20 11:22:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:58,535 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-07-20 11:22:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:58,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 11:22:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:58,553 INFO L225 Difference]: With dead ends: 4428 [2020-07-20 11:22:58,554 INFO L226 Difference]: Without dead ends: 3018 [2020-07-20 11:22:58,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 11:22:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-07-20 11:22:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-07-20 11:22:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-07-20 11:22:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-07-20 11:22:58,701 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-07-20 11:22:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:58,701 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-07-20 11:22:58,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-07-20 11:22:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:22:58,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:58,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:58,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:58,922 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-07-20 11:22:58,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:58,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741246602] [2020-07-20 11:22:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:58,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:58,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:58,965 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 11:22:58,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:58,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741246602] [2020-07-20 11:22:58,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:58,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:58,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757382834] [2020-07-20 11:22:58,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:58,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:58,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:58,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:58,967 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-07-20 11:22:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:59,070 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-07-20 11:22:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:59,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 11:22:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:59,086 INFO L225 Difference]: With dead ends: 8650 [2020-07-20 11:22:59,087 INFO L226 Difference]: Without dead ends: 3016 [2020-07-20 11:22:59,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 11:22:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-07-20 11:22:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-07-20 11:22:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-07-20 11:22:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-07-20 11:22:59,197 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-07-20 11:22:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:59,197 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-07-20 11:22:59,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-07-20 11:22:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:22:59,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:59,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:59,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:59,417 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:59,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:59,418 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-07-20 11:22:59,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:59,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600026040] [2020-07-20 11:22:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:59,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:59,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:59,463 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 11:22:59,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:59,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600026040] [2020-07-20 11:22:59,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:59,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:59,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994548597] [2020-07-20 11:22:59,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:59,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:59,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:59,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:59,467 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-07-20 11:22:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:59,507 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-07-20 11:22:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:59,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 11:22:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:59,508 INFO L225 Difference]: With dead ends: 3016 [2020-07-20 11:22:59,508 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:22:59,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 11:22:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:22:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:22:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:22:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:22:59,515 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-20 11:22:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:59,515 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:22:59,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:22:59,515 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:22:59,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:59,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:22:59,828 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:22:59,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:59,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:59,829 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:22:59,829 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:22:59,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:22:59,830 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-07-20 11:22:59,830 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-07-20 11:22:59,830 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,830 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-07-20 11:22:59,831 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,832 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-07-20 11:22:59,832 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,833 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,833 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-07-20 11:22:59,833 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-07-20 11:22:59,833 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-07-20 11:22:59,834 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-07-20 11:22:59,834 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-07-20 11:22:59,835 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,835 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,836 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,836 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,836 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-07-20 11:22:59,836 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,836 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-07-20 11:22:59,838 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-07-20 11:22:59,838 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,839 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,839 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-07-20 11:22:59,839 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-07-20 11:22:59,839 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,839 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-07-20 11:22:59,840 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,840 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,840 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-07-20 11:22:59,840 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-07-20 11:22:59,840 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 11:22:59,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:22:59 BoogieIcfgContainer [2020-07-20 11:22:59,860 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:22:59,864 INFO L168 Benchmark]: Toolchain (without parser) took 10268.64 ms. Allocated memory was 135.3 MB in the beginning and 300.9 MB in the end (delta: 165.7 MB). Free memory was 99.2 MB in the beginning and 127.7 MB in the end (delta: -28.5 MB). Peak memory consumption was 137.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:59,864 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 135.3 MB. Free memory is still 116.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:22:59,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.68 ms. Allocated memory is still 135.3 MB. Free memory was 98.8 MB in the beginning and 87.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:59,866 INFO L168 Benchmark]: Boogie Preprocessor took 152.27 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 87.9 MB in the beginning and 178.7 MB in the end (delta: -90.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:59,871 INFO L168 Benchmark]: RCFGBuilder took 415.97 ms. Allocated memory is still 200.3 MB. Free memory was 178.7 MB in the beginning and 160.6 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:59,872 INFO L168 Benchmark]: TraceAbstraction took 9388.90 ms. Allocated memory was 200.3 MB in the beginning and 300.9 MB in the end (delta: 100.7 MB). Free memory was 160.6 MB in the beginning and 127.7 MB in the end (delta: 32.9 MB). Peak memory consumption was 133.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:59,876 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 135.3 MB. Free memory is still 116.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.68 ms. Allocated memory is still 135.3 MB. Free memory was 98.8 MB in the beginning and 87.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.27 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 87.9 MB in the beginning and 178.7 MB in the end (delta: -90.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.97 ms. Allocated memory is still 200.3 MB. Free memory was 178.7 MB in the beginning and 160.6 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9388.90 ms. Allocated memory was 200.3 MB in the beginning and 300.9 MB in the end (delta: 100.7 MB). Free memory was 160.6 MB in the beginning and 127.7 MB in the end (delta: 32.9 MB). Peak memory consumption was 133.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.1s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 475 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2132 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...