/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-177f698
[2020-08-21 15:51:30,402 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-08-21 15:51:30,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 15:51:30,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 15:51:30,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 15:51:30,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 15:51:30,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 15:51:30,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 15:51:30,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 15:51:30,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-21 15:51:30,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-08-21 15:51:30,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 15:51:30,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 15:51:30,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 15:51:30,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 15:51:30,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 15:51:30,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 15:51:30,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 15:51:30,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 15:51:30,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 15:51:30,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 15:51:30,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 15:51:30,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 15:51:30,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 15:51:30,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 15:51:30,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 15:51:30,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 15:51:30,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 15:51:30,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 15:51:30,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 15:51:30,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 15:51:30,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 15:51:30,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 15:51:30,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 15:51:30,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 15:51:30,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-21 15:51:30,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-21 15:51:30,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-21 15:51:30,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-21 15:51:30,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-21 15:51:30,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 15:51:30,466 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
[2020-08-21 15:51:30,488 INFO L113 SettingsManager]: Loading preferences was successful
[2020-08-21 15:51:30,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 15:51:30,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 15:51:30,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-08-21 15:51:30,490 INFO L138 SettingsManager]: * Use SBE=true
[2020-08-21 15:51:30,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 15:51:30,491 INFO L138 SettingsManager]: * sizeof long=4
[2020-08-21 15:51:30,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-08-21 15:51:30,491 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-08-21 15:51:30,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-08-21 15:51:30,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 15:51:30,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 15:51:30,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 15:51:30,492 INFO L138 SettingsManager]: * sizeof long double=12
[2020-08-21 15:51:30,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-08-21 15:51:30,492 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-08-21 15:51:30,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-08-21 15:51:30,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 15:51:30,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-08-21 15:51:30,493 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-08-21 15:51:30,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-08-21 15:51:30,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 15:51:30,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 15:51:30,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 15:51:30,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 15:51:30,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-08-21 15:51:30,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 15:51:30,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 15:51:30,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-08-21 15:51:30,495 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.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true;
[2020-08-21 15:51:30,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 15:51:30,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 15:51:30,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 15:51:30,798 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-08-21 15:51:30,798 INFO L275 PluginConnector]: CDTParser initialized
[2020-08-21 15:51:30,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i
[2020-08-21 15:51:30,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b4a1e5aa/5f40ee7e5ea54c5bb4fb0ae056e6b523/FLAG880f10e9c
[2020-08-21 15:51:31,335 INFO L306 CDTParser]: Found 1 translation units.
[2020-08-21 15:51:31,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i
[2020-08-21 15:51:31,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b4a1e5aa/5f40ee7e5ea54c5bb4fb0ae056e6b523/FLAG880f10e9c
[2020-08-21 15:51:31,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b4a1e5aa/5f40ee7e5ea54c5bb4fb0ae056e6b523
[2020-08-21 15:51:31,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 15:51:31,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 15:51:31,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 15:51:31,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 15:51:31,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 15:51:31,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:51:31" (1/1) ...
[2020-08-21 15:51:31,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21715d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:31, skipping insertion in model container
[2020-08-21 15:51:31,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:51:31" (1/1) ...
[2020-08-21 15:51:31,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-08-21 15:51:31,771 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-08-21 15:51:32,003 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-08-21 15:51:32,007 INFO L203 MainTranslator]: Completed pre-run
[2020-08-21 15:51:32,030 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-08-21 15:51:32,045 INFO L208 MainTranslator]: Completed translation
[2020-08-21 15:51:32,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32 WrapperNode
[2020-08-21 15:51:32,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 15:51:32,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 15:51:32,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 15:51:32,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 15:51:32,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (1/1) ...
[2020-08-21 15:51:32,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (1/1) ...
[2020-08-21 15:51:32,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (1/1) ...
[2020-08-21 15:51:32,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (1/1) ...
[2020-08-21 15:51:32,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (1/1) ...
[2020-08-21 15:51:32,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (1/1) ...
[2020-08-21 15:51:32,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (1/1) ...
[2020-08-21 15:51:32,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 15:51:32,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 15:51:32,199 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 15:51:32,199 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-08-21 15:51:32,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (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
[2020-08-21 15:51:32,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 15:51:32,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 15:51:32,273 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-21 15:51:32,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-08-21 15:51:32,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 15:51:32,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 15:51:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-08-21 15:51:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-21 15:51:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-08-21 15:51:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-21 15:51:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-08-21 15:51:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 15:51:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 15:51:32,639 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 15:51:32,639 INFO L295 CfgBuilder]: Removed 2 assume(true) statements.
[2020-08-21 15:51:32,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:51:32 BoogieIcfgContainer
[2020-08-21 15:51:32,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 15:51:32,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 15:51:32,649 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 15:51:32,654 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-08-21 15:51:32,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:51:31" (1/3) ...
[2020-08-21 15:51:32,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0deeb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:51:32, skipping insertion in model container
[2020-08-21 15:51:32,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:32" (2/3) ...
[2020-08-21 15:51:32,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0deeb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:51:32, skipping insertion in model container
[2020-08-21 15:51:32,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:51:32" (3/3) ...
[2020-08-21 15:51:32,658 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i
[2020-08-21 15:51:32,669 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 15:51:32,676 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 15:51:32,691 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 15:51:32,721 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-08-21 15:51:32,722 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-08-21 15:51:32,722 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 15:51:32,722 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 15:51:32,722 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 15:51:32,722 INFO L380 AbstractCegarLoop]: Difference is false
[2020-08-21 15:51:32,722 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 15:51:32,722 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 15:51:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states.
[2020-08-21 15:51:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-08-21 15:51:32,749 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 15:51:32,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 15:51:32,750 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 15:51:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 15:51:32,755 INFO L82 PathProgramCache]: Analyzing trace with hash -234903868, now seen corresponding path program 1 times
[2020-08-21 15:51:32,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 15:51:32,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133084820]
[2020-08-21 15:51:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 15:51:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:32,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 15:51:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 15:51:32,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133084820]
[2020-08-21 15:51:32,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 15:51:32,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-08-21 15:51:32,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179151591]
[2020-08-21 15:51:32,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-08-21 15:51:32,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 15:51:32,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-08-21 15:51:32,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-08-21 15:51:32,902 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states.
[2020-08-21 15:51:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 15:51:32,969 INFO L93 Difference]: Finished difference Result 87 states and 156 transitions.
[2020-08-21 15:51:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-08-21 15:51:32,971 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12
[2020-08-21 15:51:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 15:51:32,988 INFO L225 Difference]: With dead ends: 87
[2020-08-21 15:51:32,989 INFO L226 Difference]: Without dead ends: 42
[2020-08-21 15:51:32,994 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
[2020-08-21 15:51:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-08-21 15:51:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42.
[2020-08-21 15:51:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-08-21 15:51:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions.
[2020-08-21 15:51:33,044 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 12
[2020-08-21 15:51:33,045 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 15:51:33,045 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions.
[2020-08-21 15:51:33,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-08-21 15:51:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions.
[2020-08-21 15:51:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-08-21 15:51:33,048 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 15:51:33,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 15:51:33,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 15:51:33,049 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 15:51:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 15:51:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1276958999, now seen corresponding path program 1 times
[2020-08-21 15:51:33,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 15:51:33,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600402107]
[2020-08-21 15:51:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 15:51:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 15:51:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 15:51:33,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600402107]
[2020-08-21 15:51:33,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 15:51:33,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 15:51:33,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583122375]
[2020-08-21 15:51:33,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 15:51:33,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 15:51:33,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 15:51:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 15:51:33,157 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states.
[2020-08-21 15:51:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 15:51:33,343 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions.
[2020-08-21 15:51:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-08-21 15:51:33,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-08-21 15:51:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 15:51:33,345 INFO L225 Difference]: With dead ends: 48
[2020-08-21 15:51:33,346 INFO L226 Difference]: Without dead ends: 46
[2020-08-21 15:51:33,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 15:51:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2020-08-21 15:51:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46.
[2020-08-21 15:51:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-08-21 15:51:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions.
[2020-08-21 15:51:33,363 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 13
[2020-08-21 15:51:33,364 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 15:51:33,364 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions.
[2020-08-21 15:51:33,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 15:51:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions.
[2020-08-21 15:51:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-08-21 15:51:33,365 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 15:51:33,366 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 15:51:33,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 15:51:33,366 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 15:51:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 15:51:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1880963538, now seen corresponding path program 1 times
[2020-08-21 15:51:33,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 15:51:33,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452941307]
[2020-08-21 15:51:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 15:51:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 15:51:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 15:51:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 15:51:33,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452941307]
[2020-08-21 15:51:33,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 15:51:33,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 15:51:33,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298194493]
[2020-08-21 15:51:33,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 15:51:33,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 15:51:33,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 15:51:33,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 15:51:33,487 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 5 states.
[2020-08-21 15:51:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 15:51:33,585 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions.
[2020-08-21 15:51:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-08-21 15:51:33,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18
[2020-08-21 15:51:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 15:51:33,587 INFO L225 Difference]: With dead ends: 52
[2020-08-21 15:51:33,587 INFO L226 Difference]: Without dead ends: 40
[2020-08-21 15:51:33,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 15:51:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2020-08-21 15:51:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40.
[2020-08-21 15:51:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2020-08-21 15:51:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions.
[2020-08-21 15:51:33,598 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18
[2020-08-21 15:51:33,598 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 15:51:33,599 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions.
[2020-08-21 15:51:33,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 15:51:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions.
[2020-08-21 15:51:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-08-21 15:51:33,600 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 15:51:33,600 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 15:51:33,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 15:51:33,601 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 15:51:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 15:51:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash 996212544, now seen corresponding path program 1 times
[2020-08-21 15:51:33,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 15:51:33,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377024465]
[2020-08-21 15:51:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 15:51:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 15:51:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 15:51:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 15:51:33,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377024465]
[2020-08-21 15:51:33,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 15:51:33,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-21 15:51:33,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550835506]
[2020-08-21 15:51:33,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-21 15:51:33,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 15:51:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-21 15:51:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-21 15:51:33,685 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states.
[2020-08-21 15:51:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 15:51:33,795 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions.
[2020-08-21 15:51:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-08-21 15:51:33,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-08-21 15:51:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 15:51:33,797 INFO L225 Difference]: With dead ends: 55
[2020-08-21 15:51:33,797 INFO L226 Difference]: Without dead ends: 53
[2020-08-21 15:51:33,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-08-21 15:51:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-08-21 15:51:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51.
[2020-08-21 15:51:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states.
[2020-08-21 15:51:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions.
[2020-08-21 15:51:33,809 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 19
[2020-08-21 15:51:33,810 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 15:51:33,810 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions.
[2020-08-21 15:51:33,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-21 15:51:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions.
[2020-08-21 15:51:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-08-21 15:51:33,812 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 15:51:33,812 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 15:51:33,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 15:51:33,813 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 15:51:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 15:51:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -381964826, now seen corresponding path program 1 times
[2020-08-21 15:51:33,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 15:51:33,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534948240]
[2020-08-21 15:51:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 15:51:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 15:51:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 15:51:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-08-21 15:51:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24
[2020-08-21 15:51:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 15:51:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2020-08-21 15:51:33,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534948240]
[2020-08-21 15:51:33,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 15:51:33,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-08-21 15:51:33,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939791371]
[2020-08-21 15:51:33,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-21 15:51:33,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 15:51:33,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-21 15:51:33,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-08-21 15:51:33,961 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 7 states.
[2020-08-21 15:51:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 15:51:34,101 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions.
[2020-08-21 15:51:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-08-21 15:51:34,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33
[2020-08-21 15:51:34,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 15:51:34,103 INFO L225 Difference]: With dead ends: 51
[2020-08-21 15:51:34,103 INFO L226 Difference]: Without dead ends: 0
[2020-08-21 15:51:34,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-08-21 15:51:34,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-08-21 15:51:34,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-08-21 15:51:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-08-21 15:51:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-08-21 15:51:34,105 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33
[2020-08-21 15:51:34,105 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 15:51:34,105 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-08-21 15:51:34,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-21 15:51:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-08-21 15:51:34,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-08-21 15:51:34,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 15:51:34,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-08-21 15:51:34,253 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-08-21 15:51:34,253 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-08-21 15:51:34,253 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-08-21 15:51:34,253 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-08-21 15:51:34,253 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-08-21 15:51:34,254 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-08-21 15:51:34,254 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed.
[2020-08-21 15:51:34,254 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed.
[2020-08-21 15:51:34,254 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed.
[2020-08-21 15:51:34,254 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed.
[2020-08-21 15:51:34,254 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed.
[2020-08-21 15:51:34,255 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed.
[2020-08-21 15:51:34,255 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 66) no Hoare annotation was computed.
[2020-08-21 15:51:34,255 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0))
[2020-08-21 15:51:34,255 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0))
[2020-08-21 15:51:34,255 INFO L268 CegarLoopResult]: For program point L48(lines 48 52) no Hoare annotation was computed.
[2020-08-21 15:51:34,256 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed.
[2020-08-21 15:51:34,256 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0))
[2020-08-21 15:51:34,256 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0))
[2020-08-21 15:51:34,256 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,256 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,257 INFO L264 CegarLoopResult]: At program point L37-2(lines 37 61) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0))
[2020-08-21 15:51:34,257 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,257 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,257 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,258 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0))
[2020-08-21 15:51:34,258 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,258 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed.
[2020-08-21 15:51:34,258 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 66) no Hoare annotation was computed.
[2020-08-21 15:51:34,258 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed.
[2020-08-21 15:51:34,258 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,259 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true
[2020-08-21 15:51:34,259 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,259 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true
[2020-08-21 15:51:34,259 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,259 INFO L268 CegarLoopResult]: For program point L59(line 59) no Hoare annotation was computed.
[2020-08-21 15:51:34,259 INFO L268 CegarLoopResult]: For program point L55(lines 55 57) no Hoare annotation was computed.
[2020-08-21 15:51:34,260 INFO L268 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed.
[2020-08-21 15:51:34,260 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed.
[2020-08-21 15:51:34,260 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed.
[2020-08-21 15:51:34,260 INFO L268 CegarLoopResult]: For program point L43(lines 43 57) no Hoare annotation was computed.
[2020-08-21 15:51:34,260 INFO L264 CegarLoopResult]: At program point L43-1(lines 43 57) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))
[2020-08-21 15:51:34,261 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0))
[2020-08-21 15:51:34,261 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0))
[2020-08-21 15:51:34,261 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed.
[2020-08-21 15:51:34,261 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true
[2020-08-21 15:51:34,261 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed.
[2020-08-21 15:51:34,261 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed.
[2020-08-21 15:51:34,262 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed.
[2020-08-21 15:51:34,262 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed.
[2020-08-21 15:51:34,262 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed.
[2020-08-21 15:51:34,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:51:34 BoogieIcfgContainer
[2020-08-21 15:51:34,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-21 15:51:34,284 INFO L168 Benchmark]: Toolchain (without parser) took 2555.17 ms. Allocated memory was 148.4 MB in the beginning and 233.3 MB in the end (delta: 84.9 MB). Free memory was 104.7 MB in the beginning and 151.4 MB in the end (delta: -46.7 MB). Peak memory consumption was 38.2 MB. Max. memory is 7.1 GB.
[2020-08-21 15:51:34,285 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 148.4 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-08-21 15:51:34,286 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.31 ms. Allocated memory is still 148.4 MB. Free memory was 104.3 MB in the beginning and 94.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB.
[2020-08-21 15:51:34,287 INFO L168 Benchmark]: Boogie Preprocessor took 151.35 ms. Allocated memory was 148.4 MB in the beginning and 206.0 MB in the end (delta: 57.7 MB). Free memory was 94.4 MB in the beginning and 184.0 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
[2020-08-21 15:51:34,288 INFO L168 Benchmark]: RCFGBuilder took 449.81 ms. Allocated memory is still 206.0 MB. Free memory was 184.0 MB in the beginning and 167.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB.
[2020-08-21 15:51:34,289 INFO L168 Benchmark]: TraceAbstraction took 1631.83 ms. Allocated memory was 206.0 MB in the beginning and 233.3 MB in the end (delta: 27.3 MB). Free memory was 166.5 MB in the beginning and 151.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB.
[2020-08-21 15:51:34,293 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.30 ms. Allocated memory is still 148.4 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 317.31 ms. Allocated memory is still 148.4 MB. Free memory was 104.3 MB in the beginning and 94.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 151.35 ms. Allocated memory was 148.4 MB in the beginning and 206.0 MB in the end (delta: 57.7 MB). Free memory was 94.4 MB in the beginning and 184.0 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 449.81 ms. Allocated memory is still 206.0 MB. Free memory was 184.0 MB in the beginning and 167.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 1631.83 ms. Allocated memory was 206.0 MB in the beginning and 233.3 MB in the end (delta: 27.3 MB). Free memory was 166.5 MB in the beginning and 151.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 8]: 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: 21]: Loop Invariant
Derived loop invariant: 0 <= t && t <= tagbuf_len
- InvariantResult [Line: 37]: Loop Invariant
Derived loop invariant: 0 <= t && t <= tagbuf_len
- InvariantResult [Line: 14]: Loop Invariant
Derived loop invariant: 1
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 252 SDtfs, 50 SDslu, 490 SDs, 0 SdLazy, 231 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=4, 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, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 59 PreInvPairs, 82 NumberOfFragments, 152 HoareAnnotationTreeSize, 59 FomulaSimplifications, 52 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 3756 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 24/25 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...