/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_11.c
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This is Ultimate 0.1.25-d623d84
[2020-07-20 11:22:06,815 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 11:22:06,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 11:22:06,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 11:22:06,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 11:22:06,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 11:22:06,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 11:22:06,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 11:22:06,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 11:22:06,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 11:22:06,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 11:22:06,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 11:22:06,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 11:22:06,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 11:22:06,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 11:22:06,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 11:22:06,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 11:22:06,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 11:22:06,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 11:22:06,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 11:22:06,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 11:22:06,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 11:22:06,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 11:22:06,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 11:22:06,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-07-20 11:22:06,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 11:22:06,905 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 11:22:06,936 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 11:22:06,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 11:22:06,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 11:22:06,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 11:22:06,939 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 11:22:06,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 11:22:06,939 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 11:22:06,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 11:22:06,939 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 11:22:06,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 11:22:06,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 11:22:06,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 11:22:06,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 11:22:06,942 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 11:22:06,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 11:22:06,942 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 11:22:06,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 11:22:06,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 11:22:06,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 11:22:06,943 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 11:22:06,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 11:22:06,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 11:22:06,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 11:22:06,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 11:22:06,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 11:22:06,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 11:22:06,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:06,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 11:22:06,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 11:22:06,946 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 11:22:07,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 11:22:07,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 11:22:07,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 11:22:07,260 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 11:22:07,260 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 11:22:07,261 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c
[2020-07-20 11:22:07,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/180f4ae47/2b0e9c0d1c9040fe939d964738e0e422/FLAGe17db0e7a
[2020-07-20 11:22:07,872 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 11:22:07,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c
[2020-07-20 11:22:07,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/180f4ae47/2b0e9c0d1c9040fe939d964738e0e422/FLAGe17db0e7a
[2020-07-20 11:22:08,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/180f4ae47/2b0e9c0d1c9040fe939d964738e0e422
[2020-07-20 11:22:08,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 11:22:08,250 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 11:22:08,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 11:22:08,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 11:22:08,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 11:22:08,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c92aa58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08, skipping insertion in model container
[2020-07-20 11:22:08,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 11:22:08,292 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 11:22:08,508 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 11:22:08,513 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 11:22:08,548 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 11:22:08,568 INFO L208 MainTranslator]: Completed translation
[2020-07-20 11:22:08,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08 WrapperNode
[2020-07-20 11:22:08,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 11:22:08,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 11:22:08,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 11:22:08,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 11:22:08,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (1/1) ...
[2020-07-20 11:22:08,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 11:22:08,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 11:22:08,695 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 11:22:08,695 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 11:22:08,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (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 11:22:08,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 11:22:08,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 11:22:08,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 11:22:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 11:22:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 11:22:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 11:22:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 11:22:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 11:22:09,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 11:22:09,155 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 11:22:09,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:09 BoogieIcfgContainer
[2020-07-20 11:22:09,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 11:22:09,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 11:22:09,161 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 11:22:09,164 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 11:22:09,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:22:08" (1/3) ...
[2020-07-20 11:22:09,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e6cd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:09, skipping insertion in model container
[2020-07-20 11:22:09,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:08" (2/3) ...
[2020-07-20 11:22:09,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e6cd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:09, skipping insertion in model container
[2020-07-20 11:22:09,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:09" (3/3) ...
[2020-07-20 11:22:09,168 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c
[2020-07-20 11:22:09,176 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 11:22:09,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 11:22:09,195 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 11:22:09,218 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 11:22:09,219 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 11:22:09,219 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 11:22:09,219 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 11:22:09,220 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 11:22:09,220 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 11:22:09,220 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 11:22:09,220 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 11:22:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states.
[2020-07-20 11:22:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 11:22:09,247 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:09,248 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 11:22:09,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times
[2020-07-20 11:22:09,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:09,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55760677]
[2020-07-20 11:22:09,265 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 11:22:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:09,425 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 11:22:09,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:09,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55760677]
[2020-07-20 11:22:09,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:09,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:09,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604362856]
[2020-07-20 11:22:09,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:09,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:09,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:09,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:09,454 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states.
[2020-07-20 11:22:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:09,530 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions.
[2020-07-20 11:22:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:09,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 11:22:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:09,546 INFO L225 Difference]: With dead ends: 93
[2020-07-20 11:22:09,546 INFO L226 Difference]: Without dead ends: 78
[2020-07-20 11:22:09,550 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 11:22:09,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-07-20 11:22:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54.
[2020-07-20 11:22:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-07-20 11:22:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions.
[2020-07-20 11:22:09,602 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21
[2020-07-20 11:22:09,603 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:09,603 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions.
[2020-07-20 11:22:09,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions.
[2020-07-20 11:22:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 11:22:09,605 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:09,605 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 11:22:09,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:09,822 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:09,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times
[2020-07-20 11:22:09,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:09,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497944632]
[2020-07-20 11:22:09,825 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 11:22:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:09,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:09,915 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 11:22:09,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:09,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497944632]
[2020-07-20 11:22:09,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:09,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:09,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088454807]
[2020-07-20 11:22:09,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:09,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:09,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:09,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:09,920 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states.
[2020-07-20 11:22:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:09,949 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions.
[2020-07-20 11:22:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:09,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 11:22:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:09,951 INFO L225 Difference]: With dead ends: 127
[2020-07-20 11:22:09,951 INFO L226 Difference]: Without dead ends: 78
[2020-07-20 11:22:09,953 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 11:22:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-07-20 11:22:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76.
[2020-07-20 11:22:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2020-07-20 11:22:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions.
[2020-07-20 11:22:09,968 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21
[2020-07-20 11:22:09,969 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:09,969 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions.
[2020-07-20 11:22:09,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions.
[2020-07-20 11:22:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 11:22:09,970 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:09,971 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 11:22:10,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:10,182 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times
[2020-07-20 11:22:10,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:10,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820556366]
[2020-07-20 11:22:10,188 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 11:22:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:10,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:10,255 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 11:22:10,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:10,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820556366]
[2020-07-20 11:22:10,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:10,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:10,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292298295]
[2020-07-20 11:22:10,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:10,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:10,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:10,259 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states.
[2020-07-20 11:22:10,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:10,283 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions.
[2020-07-20 11:22:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:10,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-20 11:22:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:10,289 INFO L225 Difference]: With dead ends: 117
[2020-07-20 11:22:10,289 INFO L226 Difference]: Without dead ends: 81
[2020-07-20 11:22:10,291 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 11:22:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states.
[2020-07-20 11:22:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79.
[2020-07-20 11:22:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2020-07-20 11:22:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions.
[2020-07-20 11:22:10,306 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22
[2020-07-20 11:22:10,306 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:10,307 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions.
[2020-07-20 11:22:10,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions.
[2020-07-20 11:22:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 11:22:10,308 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:10,309 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 11:22:10,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:10,523 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times
[2020-07-20 11:22:10,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:10,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711854548]
[2020-07-20 11:22:10,525 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 11:22:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:10,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:10,575 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:10,589 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 11:22:10,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:10,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711854548]
[2020-07-20 11:22:10,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:10,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:10,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205830707]
[2020-07-20 11:22:10,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:10,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:10,592 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states.
[2020-07-20 11:22:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:10,624 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions.
[2020-07-20 11:22:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:10,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-20 11:22:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:10,627 INFO L225 Difference]: With dead ends: 148
[2020-07-20 11:22:10,627 INFO L226 Difference]: Without dead ends: 146
[2020-07-20 11:22:10,628 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 11:22:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states.
[2020-07-20 11:22:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104.
[2020-07-20 11:22:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states.
[2020-07-20 11:22:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions.
[2020-07-20 11:22:10,660 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22
[2020-07-20 11:22:10,660 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:10,660 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions.
[2020-07-20 11:22:10,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions.
[2020-07-20 11:22:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 11:22:10,662 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:10,662 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 11:22:10,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:10,872 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times
[2020-07-20 11:22:10,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:10,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413694921]
[2020-07-20 11:22:10,875 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 11:22:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:10,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:10,920 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:10,929 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 11:22:10,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:10,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413694921]
[2020-07-20 11:22:10,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:10,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:10,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673096733]
[2020-07-20 11:22:10,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:10,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:10,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:10,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:10,932 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states.
[2020-07-20 11:22:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:10,959 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions.
[2020-07-20 11:22:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:10,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-20 11:22:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:10,961 INFO L225 Difference]: With dead ends: 244
[2020-07-20 11:22:10,961 INFO L226 Difference]: Without dead ends: 148
[2020-07-20 11:22:10,963 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 11:22:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states.
[2020-07-20 11:22:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146.
[2020-07-20 11:22:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states.
[2020-07-20 11:22:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions.
[2020-07-20 11:22:10,975 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22
[2020-07-20 11:22:10,975 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:10,976 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions.
[2020-07-20 11:22:10,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions.
[2020-07-20 11:22:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 11:22:10,977 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:10,977 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 11:22:11,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:11,194 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times
[2020-07-20 11:22:11,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:11,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682741092]
[2020-07-20 11:22:11,196 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 11:22:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:11,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:11,259 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 11:22:11,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:11,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682741092]
[2020-07-20 11:22:11,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:11,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:11,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011938165]
[2020-07-20 11:22:11,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:11,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:11,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:11,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:11,262 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states.
[2020-07-20 11:22:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:11,279 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions.
[2020-07-20 11:22:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:11,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-20 11:22:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:11,281 INFO L225 Difference]: With dead ends: 219
[2020-07-20 11:22:11,282 INFO L226 Difference]: Without dead ends: 150
[2020-07-20 11:22:11,283 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 11:22:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states.
[2020-07-20 11:22:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148.
[2020-07-20 11:22:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states.
[2020-07-20 11:22:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions.
[2020-07-20 11:22:11,293 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23
[2020-07-20 11:22:11,294 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:11,294 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions.
[2020-07-20 11:22:11,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions.
[2020-07-20 11:22:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 11:22:11,295 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:11,296 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 11:22:11,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:11,511 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:11,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times
[2020-07-20 11:22:11,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:11,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922348343]
[2020-07-20 11:22:11,513 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 11:22:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:11,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:11,552 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:11,565 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 11:22:11,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:11,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922348343]
[2020-07-20 11:22:11,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:11,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:11,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408365465]
[2020-07-20 11:22:11,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:11,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:11,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:11,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:11,568 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states.
[2020-07-20 11:22:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:11,595 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions.
[2020-07-20 11:22:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:11,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-20 11:22:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:11,600 INFO L225 Difference]: With dead ends: 276
[2020-07-20 11:22:11,600 INFO L226 Difference]: Without dead ends: 274
[2020-07-20 11:22:11,601 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 11:22:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states.
[2020-07-20 11:22:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200.
[2020-07-20 11:22:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states.
[2020-07-20 11:22:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions.
[2020-07-20 11:22:11,619 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23
[2020-07-20 11:22:11,619 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:11,619 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions.
[2020-07-20 11:22:11,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions.
[2020-07-20 11:22:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 11:22:11,621 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:11,621 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 11:22:11,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:11,835 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times
[2020-07-20 11:22:11,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:11,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086776289]
[2020-07-20 11:22:11,838 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 11:22:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:11,904 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 11:22:11,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:11,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086776289]
[2020-07-20 11:22:11,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:11,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:11,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462179755]
[2020-07-20 11:22:11,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:11,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:11,909 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states.
[2020-07-20 11:22:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:11,948 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions.
[2020-07-20 11:22:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:11,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-20 11:22:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:11,951 INFO L225 Difference]: With dead ends: 472
[2020-07-20 11:22:11,951 INFO L226 Difference]: Without dead ends: 282
[2020-07-20 11:22:11,954 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 11:22:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states.
[2020-07-20 11:22:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280.
[2020-07-20 11:22:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states.
[2020-07-20 11:22:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions.
[2020-07-20 11:22:11,979 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23
[2020-07-20 11:22:11,979 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:11,980 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions.
[2020-07-20 11:22:11,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions.
[2020-07-20 11:22:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 11:22:11,989 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:11,990 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 11:22:12,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:12,207 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times
[2020-07-20 11:22:12,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:12,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042864006]
[2020-07-20 11:22:12,209 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 11:22:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:12,249 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:12,260 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 11:22:12,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:12,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042864006]
[2020-07-20 11:22:12,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:12,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:12,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411378533]
[2020-07-20 11:22:12,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:12,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:12,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:12,262 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states.
[2020-07-20 11:22:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:12,284 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions.
[2020-07-20 11:22:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:12,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24
[2020-07-20 11:22:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:12,287 INFO L225 Difference]: With dead ends: 420
[2020-07-20 11:22:12,287 INFO L226 Difference]: Without dead ends: 286
[2020-07-20 11:22:12,288 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 11:22:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states.
[2020-07-20 11:22:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284.
[2020-07-20 11:22:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states.
[2020-07-20 11:22:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions.
[2020-07-20 11:22:12,304 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24
[2020-07-20 11:22:12,304 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:12,304 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions.
[2020-07-20 11:22:12,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions.
[2020-07-20 11:22:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 11:22:12,314 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:12,314 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 11:22:12,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:12,516 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:12,517 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times
[2020-07-20 11:22:12,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:12,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383967910]
[2020-07-20 11:22:12,519 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 11:22:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:12,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:12,562 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:12,573 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 11:22:12,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:12,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383967910]
[2020-07-20 11:22:12,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:12,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:12,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186133225]
[2020-07-20 11:22:12,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:12,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:12,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:12,576 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states.
[2020-07-20 11:22:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:12,597 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions.
[2020-07-20 11:22:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:12,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24
[2020-07-20 11:22:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:12,601 INFO L225 Difference]: With dead ends: 524
[2020-07-20 11:22:12,601 INFO L226 Difference]: Without dead ends: 522
[2020-07-20 11:22:12,602 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 11:22:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states.
[2020-07-20 11:22:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392.
[2020-07-20 11:22:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states.
[2020-07-20 11:22:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions.
[2020-07-20 11:22:12,619 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24
[2020-07-20 11:22:12,619 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:12,620 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions.
[2020-07-20 11:22:12,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions.
[2020-07-20 11:22:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 11:22:12,621 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:12,621 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 11:22:12,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:12,836 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times
[2020-07-20 11:22:12,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:12,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447633025]
[2020-07-20 11:22:12,838 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 11:22:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:12,887 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 11:22:12,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:12,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447633025]
[2020-07-20 11:22:12,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:12,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:12,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885398639]
[2020-07-20 11:22:12,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:12,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:12,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:12,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:12,893 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states.
[2020-07-20 11:22:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:12,935 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions.
[2020-07-20 11:22:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:12,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24
[2020-07-20 11:22:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:12,940 INFO L225 Difference]: With dead ends: 924
[2020-07-20 11:22:12,941 INFO L226 Difference]: Without dead ends: 546
[2020-07-20 11:22:12,945 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 11:22:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states.
[2020-07-20 11:22:12,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544.
[2020-07-20 11:22:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states.
[2020-07-20 11:22:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions.
[2020-07-20 11:22:12,980 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24
[2020-07-20 11:22:12,980 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:12,980 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions.
[2020-07-20 11:22:12,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:12,981 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions.
[2020-07-20 11:22:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-07-20 11:22:12,983 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:12,983 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 11:22:13,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:13,199 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:13,200 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times
[2020-07-20 11:22:13,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:13,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990738332]
[2020-07-20 11:22:13,201 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 11:22:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:13,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:13,270 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 11:22:13,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:13,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990738332]
[2020-07-20 11:22:13,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:13,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:13,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461558865]
[2020-07-20 11:22:13,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:13,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:13,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:13,284 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states.
[2020-07-20 11:22:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:13,313 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions.
[2020-07-20 11:22:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:13,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25
[2020-07-20 11:22:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:13,318 INFO L225 Difference]: With dead ends: 816
[2020-07-20 11:22:13,318 INFO L226 Difference]: Without dead ends: 554
[2020-07-20 11:22:13,320 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 11:22:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states.
[2020-07-20 11:22:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552.
[2020-07-20 11:22:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states.
[2020-07-20 11:22:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions.
[2020-07-20 11:22:13,340 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25
[2020-07-20 11:22:13,341 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:13,341 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions.
[2020-07-20 11:22:13,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions.
[2020-07-20 11:22:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-07-20 11:22:13,342 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:13,343 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 11:22:13,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:13,560 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:13,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times
[2020-07-20 11:22:13,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:13,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79640458]
[2020-07-20 11:22:13,561 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 11:22:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:13,634 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 11:22:13,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:13,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79640458]
[2020-07-20 11:22:13,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:13,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:13,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765549452]
[2020-07-20 11:22:13,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:13,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:13,637 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states.
[2020-07-20 11:22:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:13,662 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions.
[2020-07-20 11:22:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:13,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25
[2020-07-20 11:22:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:13,672 INFO L225 Difference]: With dead ends: 1004
[2020-07-20 11:22:13,672 INFO L226 Difference]: Without dead ends: 1002
[2020-07-20 11:22:13,673 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 11:22:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states.
[2020-07-20 11:22:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776.
[2020-07-20 11:22:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states.
[2020-07-20 11:22:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions.
[2020-07-20 11:22:13,702 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25
[2020-07-20 11:22:13,703 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:13,703 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions.
[2020-07-20 11:22:13,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions.
[2020-07-20 11:22:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-07-20 11:22:13,705 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:13,705 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 11:22:13,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:13,920 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times
[2020-07-20 11:22:13,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:13,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006038155]
[2020-07-20 11:22:13,921 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 11:22:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:13,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:13,953 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:13,962 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 11:22:13,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:13,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006038155]
[2020-07-20 11:22:13,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:13,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:13,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446930237]
[2020-07-20 11:22:13,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:13,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:13,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:13,965 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states.
[2020-07-20 11:22:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:13,998 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions.
[2020-07-20 11:22:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:13,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25
[2020-07-20 11:22:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:14,004 INFO L225 Difference]: With dead ends: 1820
[2020-07-20 11:22:14,004 INFO L226 Difference]: Without dead ends: 1066
[2020-07-20 11:22:14,007 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 11:22:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states.
[2020-07-20 11:22:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064.
[2020-07-20 11:22:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states.
[2020-07-20 11:22:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions.
[2020-07-20 11:22:14,039 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25
[2020-07-20 11:22:14,040 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:14,040 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions.
[2020-07-20 11:22:14,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions.
[2020-07-20 11:22:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 11:22:14,042 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:14,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:14,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:14,256 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times
[2020-07-20 11:22:14,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:14,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172084281]
[2020-07-20 11:22:14,257 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 11:22:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:14,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:14,317 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 11:22:14,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:14,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172084281]
[2020-07-20 11:22:14,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:14,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:14,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691532439]
[2020-07-20 11:22:14,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:14,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:14,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:14,323 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states.
[2020-07-20 11:22:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:14,350 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions.
[2020-07-20 11:22:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:14,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26
[2020-07-20 11:22:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:14,357 INFO L225 Difference]: With dead ends: 1596
[2020-07-20 11:22:14,357 INFO L226 Difference]: Without dead ends: 1082
[2020-07-20 11:22:14,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 11:22:14,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states.
[2020-07-20 11:22:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080.
[2020-07-20 11:22:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states.
[2020-07-20 11:22:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions.
[2020-07-20 11:22:14,397 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26
[2020-07-20 11:22:14,399 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:14,399 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions.
[2020-07-20 11:22:14,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions.
[2020-07-20 11:22:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 11:22:14,401 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:14,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:14,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:14,617 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times
[2020-07-20 11:22:14,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:14,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502572868]
[2020-07-20 11:22:14,618 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 11:22:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:14,668 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 11:22:14,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:14,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502572868]
[2020-07-20 11:22:14,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:14,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:14,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094056524]
[2020-07-20 11:22:14,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:14,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:14,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:14,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:14,672 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states.
[2020-07-20 11:22:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:14,714 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions.
[2020-07-20 11:22:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:14,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26
[2020-07-20 11:22:14,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:14,726 INFO L225 Difference]: With dead ends: 1932
[2020-07-20 11:22:14,726 INFO L226 Difference]: Without dead ends: 1930
[2020-07-20 11:22:14,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 11:22:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states.
[2020-07-20 11:22:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544.
[2020-07-20 11:22:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states.
[2020-07-20 11:22:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions.
[2020-07-20 11:22:14,809 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26
[2020-07-20 11:22:14,810 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:14,810 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions.
[2020-07-20 11:22:14,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions.
[2020-07-20 11:22:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 11:22:14,813 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:14,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:15,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:15,027 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times
[2020-07-20 11:22:15,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:15,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293196042]
[2020-07-20 11:22:15,028 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 11:22:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:15,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:15,060 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:15,070 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 11:22:15,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:15,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293196042]
[2020-07-20 11:22:15,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:15,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:15,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123298776]
[2020-07-20 11:22:15,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:15,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:15,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:15,073 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states.
[2020-07-20 11:22:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:15,124 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions.
[2020-07-20 11:22:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:15,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26
[2020-07-20 11:22:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:15,135 INFO L225 Difference]: With dead ends: 3596
[2020-07-20 11:22:15,136 INFO L226 Difference]: Without dead ends: 2090
[2020-07-20 11:22:15,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 11:22:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states.
[2020-07-20 11:22:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088.
[2020-07-20 11:22:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states.
[2020-07-20 11:22:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions.
[2020-07-20 11:22:15,219 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26
[2020-07-20 11:22:15,219 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:15,219 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions.
[2020-07-20 11:22:15,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions.
[2020-07-20 11:22:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-07-20 11:22:15,223 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:15,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:15,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:15,438 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times
[2020-07-20 11:22:15,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:15,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335289634]
[2020-07-20 11:22:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 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 11:22:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:15,500 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 11:22:15,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:15,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335289634]
[2020-07-20 11:22:15,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:15,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:15,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900999713]
[2020-07-20 11:22:15,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:15,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:15,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:15,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:15,502 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states.
[2020-07-20 11:22:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:15,553 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions.
[2020-07-20 11:22:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:15,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27
[2020-07-20 11:22:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:15,564 INFO L225 Difference]: With dead ends: 3132
[2020-07-20 11:22:15,564 INFO L226 Difference]: Without dead ends: 2122
[2020-07-20 11:22:15,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 11:22:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states.
[2020-07-20 11:22:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120.
[2020-07-20 11:22:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states.
[2020-07-20 11:22:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions.
[2020-07-20 11:22:15,631 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27
[2020-07-20 11:22:15,631 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:15,632 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions.
[2020-07-20 11:22:15,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions.
[2020-07-20 11:22:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-07-20 11:22:15,635 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:15,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:15,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:15,850 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times
[2020-07-20 11:22:15,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:15,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895752522]
[2020-07-20 11:22:15,851 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 11:22:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:15,903 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 11:22:15,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:15,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895752522]
[2020-07-20 11:22:15,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:15,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:15,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617775757]
[2020-07-20 11:22:15,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:15,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:15,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:15,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:15,905 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states.
[2020-07-20 11:22:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:15,972 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions.
[2020-07-20 11:22:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:15,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27
[2020-07-20 11:22:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:15,991 INFO L225 Difference]: With dead ends: 3724
[2020-07-20 11:22:15,991 INFO L226 Difference]: Without dead ends: 3722
[2020-07-20 11:22:15,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 11:22:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states.
[2020-07-20 11:22:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080.
[2020-07-20 11:22:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states.
[2020-07-20 11:22:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions.
[2020-07-20 11:22:16,107 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27
[2020-07-20 11:22:16,107 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:16,107 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions.
[2020-07-20 11:22:16,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions.
[2020-07-20 11:22:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-07-20 11:22:16,113 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:16,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:16,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:16,329 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times
[2020-07-20 11:22:16,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:16,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49665237]
[2020-07-20 11:22:16,330 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 11:22:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:16,382 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 11:22:16,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:16,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49665237]
[2020-07-20 11:22:16,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:16,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:16,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455144839]
[2020-07-20 11:22:16,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:16,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:16,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:16,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:16,384 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states.
[2020-07-20 11:22:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:16,452 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions.
[2020-07-20 11:22:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:16,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27
[2020-07-20 11:22:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:16,476 INFO L225 Difference]: With dead ends: 7116
[2020-07-20 11:22:16,477 INFO L226 Difference]: Without dead ends: 4106
[2020-07-20 11:22:16,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 11:22:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states.
[2020-07-20 11:22:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104.
[2020-07-20 11:22:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states.
[2020-07-20 11:22:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions.
[2020-07-20 11:22:16,629 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27
[2020-07-20 11:22:16,629 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:16,629 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions.
[2020-07-20 11:22:16,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions.
[2020-07-20 11:22:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-07-20 11:22:16,635 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:16,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:16,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:16,851 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:16,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:16,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times
[2020-07-20 11:22:16,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:16,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387849174]
[2020-07-20 11:22:16,852 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 11:22:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:16,903 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 11:22:16,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:16,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387849174]
[2020-07-20 11:22:16,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:16,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:16,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921190939]
[2020-07-20 11:22:16,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:16,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:16,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:16,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:16,907 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states.
[2020-07-20 11:22:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:16,967 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions.
[2020-07-20 11:22:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:16,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28
[2020-07-20 11:22:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:17,004 INFO L225 Difference]: With dead ends: 6156
[2020-07-20 11:22:17,004 INFO L226 Difference]: Without dead ends: 4170
[2020-07-20 11:22:17,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 11:22:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states.
[2020-07-20 11:22:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168.
[2020-07-20 11:22:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states.
[2020-07-20 11:22:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions.
[2020-07-20 11:22:17,188 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28
[2020-07-20 11:22:17,188 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:17,189 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions.
[2020-07-20 11:22:17,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions.
[2020-07-20 11:22:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-07-20 11:22:17,195 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:17,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:17,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:17,410 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:17,410 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times
[2020-07-20 11:22:17,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:17,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862082140]
[2020-07-20 11:22:17,411 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 11:22:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:17,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:17,446 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:17,452 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 11:22:17,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:17,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862082140]
[2020-07-20 11:22:17,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:17,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:17,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368730637]
[2020-07-20 11:22:17,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:17,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:17,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:17,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:17,458 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states.
[2020-07-20 11:22:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:17,561 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions.
[2020-07-20 11:22:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:17,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28
[2020-07-20 11:22:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:17,592 INFO L225 Difference]: With dead ends: 12108
[2020-07-20 11:22:17,592 INFO L226 Difference]: Without dead ends: 8074
[2020-07-20 11:22:17,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 11:22:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states.
[2020-07-20 11:22:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072.
[2020-07-20 11:22:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states.
[2020-07-20 11:22:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions.
[2020-07-20 11:22:17,800 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28
[2020-07-20 11:22:17,800 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:17,800 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions.
[2020-07-20 11:22:17,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions.
[2020-07-20 11:22:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-07-20 11:22:17,811 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:17,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:18,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:18,027 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:18,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times
[2020-07-20 11:22:18,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:18,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071229465]
[2020-07-20 11:22:18,028 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 11:22:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:18,067 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:18,073 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 11:22:18,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:18,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071229465]
[2020-07-20 11:22:18,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:18,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:18,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184750172]
[2020-07-20 11:22:18,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:18,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:18,076 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states.
[2020-07-20 11:22:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:18,265 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions.
[2020-07-20 11:22:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:18,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28
[2020-07-20 11:22:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:18,286 INFO L225 Difference]: With dead ends: 9100
[2020-07-20 11:22:18,287 INFO L226 Difference]: Without dead ends: 9098
[2020-07-20 11:22:18,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 11:22:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states.
[2020-07-20 11:22:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072.
[2020-07-20 11:22:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states.
[2020-07-20 11:22:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions.
[2020-07-20 11:22:18,487 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28
[2020-07-20 11:22:18,487 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:18,487 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions.
[2020-07-20 11:22:18,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions.
[2020-07-20 11:22:18,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-07-20 11:22:18,498 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:18,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:18,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:18,715 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:18,715 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times
[2020-07-20 11:22:18,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:18,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984755728]
[2020-07-20 11:22:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:18,749 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:18,759 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 11:22:18,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:18,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984755728]
[2020-07-20 11:22:18,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:18,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:18,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242904437]
[2020-07-20 11:22:18,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:18,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:18,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:18,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:18,762 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states.
[2020-07-20 11:22:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:19,011 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions.
[2020-07-20 11:22:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:19,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29
[2020-07-20 11:22:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:19,040 INFO L225 Difference]: With dead ends: 13708
[2020-07-20 11:22:19,041 INFO L226 Difference]: Without dead ends: 13706
[2020-07-20 11:22:19,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 11:22:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states.
[2020-07-20 11:22:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168.
[2020-07-20 11:22:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states.
[2020-07-20 11:22:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions.
[2020-07-20 11:22:19,278 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29
[2020-07-20 11:22:19,278 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:19,278 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions.
[2020-07-20 11:22:19,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions.
[2020-07-20 11:22:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-07-20 11:22:19,300 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:19,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:19,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:19,516 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times
[2020-07-20 11:22:19,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:19,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037360959]
[2020-07-20 11:22:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:19,551 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:19,556 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 11:22:19,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:19,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037360959]
[2020-07-20 11:22:19,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:19,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:19,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828198238]
[2020-07-20 11:22:19,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:19,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:19,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:19,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:19,558 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states.
[2020-07-20 11:22:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:19,878 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions.
[2020-07-20 11:22:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:19,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29
[2020-07-20 11:22:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:19,914 INFO L225 Difference]: With dead ends: 27788
[2020-07-20 11:22:19,915 INFO L226 Difference]: Without dead ends: 15754
[2020-07-20 11:22:19,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 11:22:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states.
[2020-07-20 11:22:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752.
[2020-07-20 11:22:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states.
[2020-07-20 11:22:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions.
[2020-07-20 11:22:20,238 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29
[2020-07-20 11:22:20,238 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:20,238 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions.
[2020-07-20 11:22:20,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions.
[2020-07-20 11:22:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-07-20 11:22:20,260 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:20,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:20,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:20,474 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times
[2020-07-20 11:22:20,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:20,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797297736]
[2020-07-20 11:22:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:20,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:20,514 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:20,518 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 11:22:20,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:20,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797297736]
[2020-07-20 11:22:20,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:20,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:20,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926434508]
[2020-07-20 11:22:20,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:20,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:20,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:20,520 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states.
[2020-07-20 11:22:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:21,129 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions.
[2020-07-20 11:22:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:21,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30
[2020-07-20 11:22:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:21,166 INFO L225 Difference]: With dead ends: 23820
[2020-07-20 11:22:21,166 INFO L226 Difference]: Without dead ends: 16138
[2020-07-20 11:22:21,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 11:22:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states.
[2020-07-20 11:22:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136.
[2020-07-20 11:22:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states.
[2020-07-20 11:22:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions.
[2020-07-20 11:22:21,473 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30
[2020-07-20 11:22:21,473 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:21,473 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions.
[2020-07-20 11:22:21,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions.
[2020-07-20 11:22:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-07-20 11:22:21,493 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:21,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:21,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:21,706 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times
[2020-07-20 11:22:21,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:21,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111286440]
[2020-07-20 11:22:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:21,739 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:21,745 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 11:22:21,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:21,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111286440]
[2020-07-20 11:22:21,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:21,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:21,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142190777]
[2020-07-20 11:22:21,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:21,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:21,747 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states.
[2020-07-20 11:22:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:22,063 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions.
[2020-07-20 11:22:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:22,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30
[2020-07-20 11:22:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:22,126 INFO L225 Difference]: With dead ends: 26636
[2020-07-20 11:22:22,126 INFO L226 Difference]: Without dead ends: 26634
[2020-07-20 11:22:22,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 11:22:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states.
[2020-07-20 11:22:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584.
[2020-07-20 11:22:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states.
[2020-07-20 11:22:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions.
[2020-07-20 11:22:22,578 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30
[2020-07-20 11:22:22,578 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:22,578 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions.
[2020-07-20 11:22:22,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions.
[2020-07-20 11:22:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-07-20 11:22:22,615 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:22,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:22,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:22,830 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:22,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:22,830 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times
[2020-07-20 11:22:22,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:22,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125823754]
[2020-07-20 11:22:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:22,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:22,881 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 11:22:22,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:22,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125823754]
[2020-07-20 11:22:22,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:22,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:22,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989412160]
[2020-07-20 11:22:22,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:22,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:22,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:22,883 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states.
[2020-07-20 11:22:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:23,263 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions.
[2020-07-20 11:22:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:23,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30
[2020-07-20 11:22:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:23,318 INFO L225 Difference]: With dead ends: 55308
[2020-07-20 11:22:23,318 INFO L226 Difference]: Without dead ends: 31242
[2020-07-20 11:22:23,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 11:22:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states.
[2020-07-20 11:22:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240.
[2020-07-20 11:22:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states.
[2020-07-20 11:22:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions.
[2020-07-20 11:22:24,125 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30
[2020-07-20 11:22:24,125 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:24,125 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions.
[2020-07-20 11:22:24,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions.
[2020-07-20 11:22:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-07-20 11:22:24,163 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:24,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:24,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:24,378 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times
[2020-07-20 11:22:24,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:24,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61742616]
[2020-07-20 11:22:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:24,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:24,438 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 11:22:24,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:24,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61742616]
[2020-07-20 11:22:24,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:24,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:24,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879476451]
[2020-07-20 11:22:24,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:24,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:24,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:24,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:24,445 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states.
[2020-07-20 11:22:24,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:24,783 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions.
[2020-07-20 11:22:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:24,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31
[2020-07-20 11:22:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:24,834 INFO L225 Difference]: With dead ends: 46860
[2020-07-20 11:22:24,834 INFO L226 Difference]: Without dead ends: 31754
[2020-07-20 11:22:24,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 11:22:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states.
[2020-07-20 11:22:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752.
[2020-07-20 11:22:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states.
[2020-07-20 11:22:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions.
[2020-07-20 11:22:26,279 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31
[2020-07-20 11:22:26,279 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:26,279 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions.
[2020-07-20 11:22:26,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions.
[2020-07-20 11:22:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-07-20 11:22:26,297 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:26,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:26,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:26,498 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:26,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times
[2020-07-20 11:22:26,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:26,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589564779]
[2020-07-20 11:22:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:26,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:26,535 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:26,543 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 11:22:26,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:26,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589564779]
[2020-07-20 11:22:26,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:26,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:26,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341445326]
[2020-07-20 11:22:26,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:26,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:26,545 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states.
[2020-07-20 11:22:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:26,839 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions.
[2020-07-20 11:22:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:26,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31
[2020-07-20 11:22:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:26,897 INFO L225 Difference]: With dead ends: 51210
[2020-07-20 11:22:26,898 INFO L226 Difference]: Without dead ends: 51208
[2020-07-20 11:22:26,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 11:22:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states.
[2020-07-20 11:22:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160.
[2020-07-20 11:22:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states.
[2020-07-20 11:22:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions.
[2020-07-20 11:22:27,775 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31
[2020-07-20 11:22:27,776 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:27,776 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions.
[2020-07-20 11:22:27,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions.
[2020-07-20 11:22:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-07-20 11:22:27,814 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:22:27,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:22:28,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:28,021 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:22:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:22:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times
[2020-07-20 11:22:28,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:22:28,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368568941]
[2020-07-20 11:22:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:22:28,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:22:28,052 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:22:28,058 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 11:22:28,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:22:28,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368568941]
[2020-07-20 11:22:28,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:22:28,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 11:22:28,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084659426]
[2020-07-20 11:22:28,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 11:22:28,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:22:28,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 11:22:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 11:22:28,060 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states.
[2020-07-20 11:22:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:22:28,785 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions.
[2020-07-20 11:22:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 11:22:28,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31
[2020-07-20 11:22:28,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:22:28,787 INFO L225 Difference]: With dead ends: 109576
[2020-07-20 11:22:28,787 INFO L226 Difference]: Without dead ends: 0
[2020-07-20 11:22:28,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 11:22:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 11:22:28,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 11:22:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 11:22:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 11:22:28,894 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31
[2020-07-20 11:22:28,894 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:22:28,894 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 11:22:28,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 11:22:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 11:22:28,895 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 11:22:29,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:22:29,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 11:22:29,179 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-07-20 11:22:29,179 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 11:22:29,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 11:22:29,180 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-07-20 11:22:29,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-07-20 11:22:29,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-07-20 11:22:29,180 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed.
[2020-07-20 11:22:29,180 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed.
[2020-07-20 11:22:29,180 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed.
[2020-07-20 11:22:29,180 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed.
[2020-07-20 11:22:29,181 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed.
[2020-07-20 11:22:29,181 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false
[2020-07-20 11:22:29,181 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,181 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,181 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,181 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,181 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed.
[2020-07-20 11:22:29,181 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,182 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed.
[2020-07-20 11:22:29,182 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,182 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,182 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed.
[2020-07-20 11:22:29,182 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,182 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed.
[2020-07-20 11:22:29,182 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,182 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,183 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed.
[2020-07-20 11:22:29,183 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true
[2020-07-20 11:22:29,183 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed.
[2020-07-20 11:22:29,183 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed.
[2020-07-20 11:22:29,183 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,183 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,183 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed.
[2020-07-20 11:22:29,183 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed.
[2020-07-20 11:22:29,184 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true
[2020-07-20 11:22:29,184 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,184 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,184 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,184 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,184 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,184 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,184 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,185 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed.
[2020-07-20 11:22:29,185 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed.
[2020-07-20 11:22:29,185 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,185 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed.
[2020-07-20 11:22:29,185 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true
[2020-07-20 11:22:29,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:22:29 BoogieIcfgContainer
[2020-07-20 11:22:29,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 11:22:29,205 INFO L168 Benchmark]: Toolchain (without parser) took 20955.55 ms. Allocated memory was 138.9 MB in the beginning and 1.0 GB in the end (delta: 861.9 MB). Free memory was 101.6 MB in the beginning and 580.6 MB in the end (delta: -478.9 MB). Peak memory consumption was 383.0 MB. Max. memory is 7.1 GB.
[2020-07-20 11:22:29,205 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory is still 120.3 MB. There was no memory consumed. Max. memory is 7.1 GB.
[2020-07-20 11:22:29,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.71 ms. Allocated memory is still 138.9 MB. Free memory was 101.2 MB in the beginning and 90.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB.
[2020-07-20 11:22:29,206 INFO L168 Benchmark]: Boogie Preprocessor took 125.19 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 180.1 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
[2020-07-20 11:22:29,206 INFO L168 Benchmark]: RCFGBuilder took 464.45 ms. Allocated memory is still 202.4 MB. Free memory was 180.1 MB in the beginning and 159.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB.
[2020-07-20 11:22:29,207 INFO L168 Benchmark]: TraceAbstraction took 20041.33 ms. Allocated memory was 202.4 MB in the beginning and 1.0 GB in the end (delta: 798.5 MB). Free memory was 158.9 MB in the beginning and 580.6 MB in the end (delta: -421.7 MB). Peak memory consumption was 376.8 MB. Max. memory is 7.1 GB.
[2020-07-20 11:22:29,209 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory is still 120.3 MB. There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 318.71 ms. Allocated memory is still 138.9 MB. Free memory was 101.2 MB in the beginning and 90.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 125.19 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 180.1 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 464.45 ms. Allocated memory is still 202.4 MB. Free memory was 180.1 MB in the beginning and 159.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 20041.33 ms. Allocated memory was 202.4 MB in the beginning and 1.0 GB in the end (delta: 798.5 MB). Free memory was 158.9 MB in the beginning and 580.6 MB in the end (delta: -421.7 MB). Peak memory consumption was 376.8 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.8s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 777 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.6s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3761 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...