/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c
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This is Ultimate 0.1.25-c90d42b
[2020-09-24 15:07:58,496 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:07:58,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:07:58,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:07:58,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 15:07:58,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 15:07:58,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 15:07:58,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 15:07:58,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 15:07:58,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 15:07:58,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 15:07:58,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 15:07:58,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 15:07:58,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 15:07:58,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 15:07:58,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 15:07:58,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:07:58,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:07:58,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:07:58,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:07:58,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:07:58,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:07:58,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:07:58,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:07:58,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 15:07:58,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 15:07:58,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 15:07:58,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 15:07:58,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 15:07:58,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 15:07:58,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 15:07:58,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 15:07:58,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 15:07:58,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 15:07:58,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 15:07:58,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 15:07:58,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 15:07:58,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 15:07:58,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 15:07:58,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 15:07:58,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:07:58,598 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 15:07:58,623 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 15:07:58,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:07:58,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:07:58,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 15:07:58,625 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 15:07:58,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:07:58,626 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 15:07:58,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 15:07:58,626 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 15:07:58,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 15:07:58,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:07:58,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:07:58,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:07:58,627 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 15:07:58,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 15:07:58,628 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 15:07:58,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:07:58,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:07:58,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 15:07:58,629 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 15:07:58,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 15:07:58,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:07:58,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:07:58,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:07:58,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:07:58,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 15:07:58,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:07:58,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:07:58,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 15:07:58,631 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 -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-24 15:07:59,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:07:59,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:07:59,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:07:59,163 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 15:07:59,163 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 15:07:59,164 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c
[2020-09-24 15:07:59,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3097dc3c/c06da343f25a4f7c9008f5d391e5567b/FLAGe1ae995d8
[2020-09-24 15:07:59,808 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 15:07:59,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c
[2020-09-24 15:07:59,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3097dc3c/c06da343f25a4f7c9008f5d391e5567b/FLAGe1ae995d8
[2020-09-24 15:08:00,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d3097dc3c/c06da343f25a4f7c9008f5d391e5567b
[2020-09-24 15:08:00,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:08:00,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:08:00,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:08:00,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:08:00,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:08:00,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424943e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00, skipping insertion in model container
[2020-09-24 15:08:00,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 15:08:00,224 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:08:00,443 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:08:00,450 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 15:08:00,469 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:08:00,484 INFO L208 MainTranslator]: Completed translation
[2020-09-24 15:08:00,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00 WrapperNode
[2020-09-24 15:08:00,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:08:00,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:08:00,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:08:00,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:08:00,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ...
[2020-09-24 15:08:00,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:08:00,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:08:00,595 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:08:00,596 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:08:00,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-09-24 15:08:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:08:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:08:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 15:08:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:08:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:08:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 15:08:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:08:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:08:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:08:00,893 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:08:00,894 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 15:08:00,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:00 BoogieIcfgContainer
[2020-09-24 15:08:00,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:08:00,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:08:00,900 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:08:00,905 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:08:00,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:08:00" (1/3) ...
[2020-09-24 15:08:00,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bb776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:00, skipping insertion in model container
[2020-09-24 15:08:00,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:00" (2/3) ...
[2020-09-24 15:08:00,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bb776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:00, skipping insertion in model container
[2020-09-24 15:08:00,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:00" (3/3) ...
[2020-09-24 15:08:00,910 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c
[2020-09-24 15:08:00,922 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:08:00,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 15:08:00,957 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 15:08:00,995 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:08:00,995 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 15:08:00,996 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:08:00,996 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:08:00,996 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:08:00,997 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 15:08:00,997 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:08:00,997 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:08:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states.
[2020-09-24 15:08:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-09-24 15:08:01,037 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:08:01,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:08:01,039 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:08:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:08:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times
[2020-09-24 15:08:01,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:08:01,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694857945]
[2020-09-24 15:08:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:08:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:01,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:08:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:08:01,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694857945]
[2020-09-24 15:08:01,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:08:01,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-09-24 15:08:01,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270778884]
[2020-09-24 15:08:01,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-09-24 15:08:01,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:08:01,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-09-24 15:08:01,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-24 15:08:01,229 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states.
[2020-09-24 15:08:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:08:01,257 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions.
[2020-09-24 15:08:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-09-24 15:08:01,259 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11
[2020-09-24 15:08:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:08:01,270 INFO L225 Difference]: With dead ends: 33
[2020-09-24 15:08:01,270 INFO L226 Difference]: Without dead ends: 16
[2020-09-24 15:08:01,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-24 15:08:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2020-09-24 15:08:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2020-09-24 15:08:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2020-09-24 15:08:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions.
[2020-09-24 15:08:01,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11
[2020-09-24 15:08:01,320 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:08:01,321 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions.
[2020-09-24 15:08:01,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-09-24 15:08:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions.
[2020-09-24 15:08:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-09-24 15:08:01,322 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:08:01,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:08:01,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:08:01,323 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:08:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:08:01,324 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times
[2020-09-24 15:08:01,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:08:01,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323334168]
[2020-09-24 15:08:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:08:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:01,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:08:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:08:01,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323334168]
[2020-09-24 15:08:01,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:08:01,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-09-24 15:08:01,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730353209]
[2020-09-24 15:08:01,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-09-24 15:08:01,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:08:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-09-24 15:08:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-24 15:08:01,492 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states.
[2020-09-24 15:08:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:08:01,542 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions.
[2020-09-24 15:08:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-09-24 15:08:01,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11
[2020-09-24 15:08:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:08:01,544 INFO L225 Difference]: With dead ends: 24
[2020-09-24 15:08:01,544 INFO L226 Difference]: Without dead ends: 19
[2020-09-24 15:08:01,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-24 15:08:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2020-09-24 15:08:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17.
[2020-09-24 15:08:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2020-09-24 15:08:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2020-09-24 15:08:01,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11
[2020-09-24 15:08:01,558 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:08:01,559 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2020-09-24 15:08:01,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-09-24 15:08:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2020-09-24 15:08:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-24 15:08:01,560 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:08:01,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:08:01,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:08:01,561 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:08:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:08:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times
[2020-09-24 15:08:01,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:08:01,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611514143]
[2020-09-24 15:08:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:08:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:01,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:08:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:08:01,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611514143]
[2020-09-24 15:08:01,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:08:01,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 15:08:01,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331724013]
[2020-09-24 15:08:01,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 15:08:01,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:08:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 15:08:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-09-24 15:08:01,803 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states.
[2020-09-24 15:08:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:08:01,895 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions.
[2020-09-24 15:08:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-24 15:08:01,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16
[2020-09-24 15:08:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:08:01,897 INFO L225 Difference]: With dead ends: 29
[2020-09-24 15:08:01,898 INFO L226 Difference]: Without dead ends: 24
[2020-09-24 15:08:01,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2020-09-24 15:08:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-09-24 15:08:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22.
[2020-09-24 15:08:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-09-24 15:08:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions.
[2020-09-24 15:08:01,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16
[2020-09-24 15:08:01,905 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:08:01,905 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions.
[2020-09-24 15:08:01,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 15:08:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions.
[2020-09-24 15:08:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-09-24 15:08:01,906 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:08:01,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:08:01,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 15:08:01,907 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:08:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:08:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times
[2020-09-24 15:08:01,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:08:01,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426064760]
[2020-09-24 15:08:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:08:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:02,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:08:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:08:02,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426064760]
[2020-09-24 15:08:02,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:08:02,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 15:08:02,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837360887]
[2020-09-24 15:08:02,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 15:08:02,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:08:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 15:08:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2020-09-24 15:08:02,158 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states.
[2020-09-24 15:08:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:08:02,328 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions.
[2020-09-24 15:08:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-09-24 15:08:02,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21
[2020-09-24 15:08:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:08:02,330 INFO L225 Difference]: With dead ends: 34
[2020-09-24 15:08:02,330 INFO L226 Difference]: Without dead ends: 29
[2020-09-24 15:08:02,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156
[2020-09-24 15:08:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2020-09-24 15:08:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27.
[2020-09-24 15:08:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2020-09-24 15:08:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions.
[2020-09-24 15:08:02,339 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21
[2020-09-24 15:08:02,339 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:08:02,339 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions.
[2020-09-24 15:08:02,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 15:08:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions.
[2020-09-24 15:08:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-09-24 15:08:02,341 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:08:02,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:08:02,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 15:08:02,342 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:08:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:08:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times
[2020-09-24 15:08:02,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:08:02,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526625034]
[2020-09-24 15:08:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:08:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:02,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:08:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:08:02,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526625034]
[2020-09-24 15:08:02,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:08:02,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 15:08:02,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982996900]
[2020-09-24 15:08:02,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 15:08:02,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:08:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 15:08:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2020-09-24 15:08:02,518 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states.
[2020-09-24 15:08:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:08:02,677 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions.
[2020-09-24 15:08:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-09-24 15:08:02,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26
[2020-09-24 15:08:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:08:02,679 INFO L225 Difference]: With dead ends: 39
[2020-09-24 15:08:02,679 INFO L226 Difference]: Without dead ends: 34
[2020-09-24 15:08:02,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210
[2020-09-24 15:08:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-09-24 15:08:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32.
[2020-09-24 15:08:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-09-24 15:08:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions.
[2020-09-24 15:08:02,686 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26
[2020-09-24 15:08:02,687 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:08:02,687 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions.
[2020-09-24 15:08:02,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 15:08:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions.
[2020-09-24 15:08:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-24 15:08:02,688 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:08:02,688 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:08:02,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 15:08:02,689 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:08:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:08:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times
[2020-09-24 15:08:02,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:08:02,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463955075]
[2020-09-24 15:08:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:08:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:02,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:08:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:08:02,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463955075]
[2020-09-24 15:08:02,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:08:02,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-24 15:08:02,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069914781]
[2020-09-24 15:08:02,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-24 15:08:02,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:08:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-24 15:08:02,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156
[2020-09-24 15:08:02,925 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states.
[2020-09-24 15:08:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:08:03,191 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions.
[2020-09-24 15:08:03,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2020-09-24 15:08:03,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31
[2020-09-24 15:08:03,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:08:03,193 INFO L225 Difference]: With dead ends: 44
[2020-09-24 15:08:03,193 INFO L226 Difference]: Without dead ends: 39
[2020-09-24 15:08:03,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420
[2020-09-24 15:08:03,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2020-09-24 15:08:03,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37.
[2020-09-24 15:08:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2020-09-24 15:08:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions.
[2020-09-24 15:08:03,201 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31
[2020-09-24 15:08:03,202 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:08:03,202 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions.
[2020-09-24 15:08:03,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-24 15:08:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions.
[2020-09-24 15:08:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-09-24 15:08:03,204 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:08:03,204 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:08:03,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 15:08:03,205 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:08:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:08:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times
[2020-09-24 15:08:03,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:08:03,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465542754]
[2020-09-24 15:08:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:08:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:08:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:08:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:08:03,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465542754]
[2020-09-24 15:08:03,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:08:03,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2020-09-24 15:08:03,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805523554]
[2020-09-24 15:08:03,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-09-24 15:08:03,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:08:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-09-24 15:08:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210
[2020-09-24 15:08:03,558 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 15 states.
[2020-09-24 15:08:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:08:03,932 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions.
[2020-09-24 15:08:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2020-09-24 15:08:03,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36
[2020-09-24 15:08:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:08:03,933 INFO L225 Difference]: With dead ends: 49
[2020-09-24 15:08:03,934 INFO L226 Difference]: Without dead ends: 44
[2020-09-24 15:08:03,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600
[2020-09-24 15:08:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-09-24 15:08:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42.
[2020-09-24 15:08:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-24 15:08:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions.
[2020-09-24 15:08:03,941 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36
[2020-09-24 15:08:03,941 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:08:03,941 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions.
[2020-09-24 15:08:03,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-09-24 15:08:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions.
[2020-09-24 15:08:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-24 15:08:03,943 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 15:08:03,943 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:08:03,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 15:08:03,943 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:08:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:08:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times
[2020-09-24 15:08:03,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:08:03,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384112454]
[2020-09-24 15:08:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:08:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 15:08:03,962 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 15:08:03,963 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 15:08:03,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-24 15:08:03,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:08:03 BoogieIcfgContainer
[2020-09-24 15:08:03,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 15:08:03,992 INFO L168 Benchmark]: Toolchain (without parser) took 3822.92 ms. Allocated memory was 138.9 MB in the beginning and 246.9 MB in the end (delta: 108.0 MB). Free memory was 101.6 MB in the beginning and 168.8 MB in the end (delta: -67.2 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB.
[2020-09-24 15:08:03,993 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-24 15:08:03,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.29 ms. Allocated memory is still 138.9 MB. Free memory was 101.0 MB in the beginning and 91.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
[2020-09-24 15:08:03,995 INFO L168 Benchmark]: Boogie Preprocessor took 109.18 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
[2020-09-24 15:08:03,996 INFO L168 Benchmark]: RCFGBuilder took 303.37 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 168.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB.
[2020-09-24 15:08:03,997 INFO L168 Benchmark]: TraceAbstraction took 3088.43 ms. Allocated memory was 201.3 MB in the beginning and 246.9 MB in the end (delta: 45.6 MB). Free memory was 168.5 MB in the beginning and 168.8 MB in the end (delta: -319.9 kB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB.
[2020-09-24 15:08:04,001 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 308.29 ms. Allocated memory is still 138.9 MB. Free memory was 101.0 MB in the beginning and 91.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 109.18 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 303.37 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 168.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 3088.43 ms. Allocated memory was 201.3 MB in the beginning and 246.9 MB in the end (delta: 45.6 MB). Free memory was 168.5 MB in the beginning and 168.8 MB in the end (delta: -319.9 kB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L11] unsigned int x = 0;
[L12] unsigned int y = 1;
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
[L14] COND FALSE !(x < 6)
[L19] CALL __VERIFIER_assert(x != 6)
[L4] COND TRUE !(cond)
[L5] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 51 SDslu, 555 SDs, 0 SdLazy, 499 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 20045 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/115 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 incorrect!
Received shutdown request...