/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i
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This is Ultimate 0.1.25-d623d84
[2020-07-20 14:29:31,683 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 14:29:31,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 14:29:31,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 14:29:31,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 14:29:31,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 14:29:31,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 14:29:31,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 14:29:31,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 14:29:31,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 14:29:31,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 14:29:31,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 14:29:31,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 14:29:31,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 14:29:31,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 14:29:31,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 14:29:31,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 14:29:31,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 14:29:31,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 14:29:31,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 14:29:31,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 14:29:31,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 14:29:31,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 14:29:31,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 14:29:31,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 14:29:31,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 14:29:31,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 14:29:31,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 14:29:31,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 14:29:31,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 14:29:31,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 14:29:31,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 14:29:31,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 14:29:31,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 14:29:31,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 14:29:31,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 14:29:31,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 14:29:31,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 14:29:31,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 14:29:31,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 14:29:31,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 14:29:31,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 14:29:31,750 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 14:29:31,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 14:29:31,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 14:29:31,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 14:29:31,751 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 14:29:31,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 14:29:31,752 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 14:29:31,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 14:29:31,752 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 14:29:31,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 14:29:31,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 14:29:31,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 14:29:31,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 14:29:31,753 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 14:29:31,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 14:29:31,754 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 14:29:31,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 14:29:31,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 14:29:31,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 14:29:31,754 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 14:29:31,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 14:29:31,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 14:29:31,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 14:29:31,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 14:29:31,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 14:29:31,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 14:29:31,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:31,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 14:29:31,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 14:29:31,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 14:29:32,017 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 14:29:32,033 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 14:29:32,037 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 14:29:32,040 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 14:29:32,042 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 14:29:32,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i
[2020-07-20 14:29:32,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce81db71c/89ba77629689446db0d1667a7cd98e47/FLAG4c27b8905
[2020-07-20 14:29:32,591 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 14:29:32,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i
[2020-07-20 14:29:32,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce81db71c/89ba77629689446db0d1667a7cd98e47/FLAG4c27b8905
[2020-07-20 14:29:32,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce81db71c/89ba77629689446db0d1667a7cd98e47
[2020-07-20 14:29:32,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 14:29:32,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 14:29:32,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 14:29:32,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 14:29:32,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 14:29:32,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:29:32" (1/1) ...
[2020-07-20 14:29:32,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f44d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:32, skipping insertion in model container
[2020-07-20 14:29:32,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:29:32" (1/1) ...
[2020-07-20 14:29:32,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 14:29:32,979 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 14:29:33,161 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 14:29:33,165 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 14:29:33,186 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 14:29:33,200 INFO L208 MainTranslator]: Completed translation
[2020-07-20 14:29:33,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33 WrapperNode
[2020-07-20 14:29:33,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 14:29:33,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 14:29:33,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 14:29:33,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 14:29:33,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (1/1) ...
[2020-07-20 14:29:33,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (1/1) ...
[2020-07-20 14:29:33,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (1/1) ...
[2020-07-20 14:29:33,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (1/1) ...
[2020-07-20 14:29:33,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (1/1) ...
[2020-07-20 14:29:33,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (1/1) ...
[2020-07-20 14:29:33,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (1/1) ...
[2020-07-20 14:29:33,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 14:29:33,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 14:29:33,323 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 14:29:33,323 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 14:29:33,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 14:29:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 14:29:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 14:29:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 14:29:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 14:29:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 14:29:33,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 14:29:33,384 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 14:29:33,384 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 14:29:33,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 14:29:33,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 14:29:33,384 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 14:29:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 14:29:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 14:29:33,695 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 14:29:33,695 INFO L295 CfgBuilder]: Removed 2 assume(true) statements.
[2020-07-20 14:29:33,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:29:33 BoogieIcfgContainer
[2020-07-20 14:29:33,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 14:29:33,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 14:29:33,701 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 14:29:33,703 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 14:29:33,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:29:32" (1/3) ...
[2020-07-20 14:29:33,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24fac9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:29:33, skipping insertion in model container
[2020-07-20 14:29:33,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:33" (2/3) ...
[2020-07-20 14:29:33,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24fac9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:29:33, skipping insertion in model container
[2020-07-20 14:29:33,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:29:33" (3/3) ...
[2020-07-20 14:29:33,706 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i
[2020-07-20 14:29:33,713 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 14:29:33,719 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 14:29:33,732 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 14:29:33,753 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 14:29:33,754 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 14:29:33,754 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 14:29:33,754 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 14:29:33,754 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 14:29:33,754 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 14:29:33,754 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 14:29:33,754 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 14:29:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states.
[2020-07-20 14:29:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-07-20 14:29:33,776 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 14:29:33,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:29:33,777 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:29:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:29:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1128800291, now seen corresponding path program 1 times
[2020-07-20 14:29:33,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:29:33,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845680218]
[2020-07-20 14:29:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:33,865 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 14:29:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:29:33,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 14:29:33,881 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:29:33,950 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:29:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:29:33,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:29:33,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845680218]
[2020-07-20 14:29:33,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:29:33,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 14:29:33,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925170697]
[2020-07-20 14:29:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 14:29:33,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:29:33,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 14:29:33,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 14:29:33,996 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states.
[2020-07-20 14:29:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:29:34,157 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions.
[2020-07-20 14:29:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-07-20 14:29:34,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-07-20 14:29:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:29:34,170 INFO L225 Difference]: With dead ends: 87
[2020-07-20 14:29:34,170 INFO L226 Difference]: Without dead ends: 46
[2020-07-20 14:29:34,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:29:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2020-07-20 14:29:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42.
[2020-07-20 14:29:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-07-20 14:29:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions.
[2020-07-20 14:29:34,234 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13
[2020-07-20 14:29:34,234 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:29:34,235 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions.
[2020-07-20 14:29:34,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 14:29:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions.
[2020-07-20 14:29:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-07-20 14:29:34,237 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 14:29:34,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:29:34,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:34,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:29:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:29:34,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1106844324, now seen corresponding path program 1 times
[2020-07-20 14:29:34,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:29:34,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623043177]
[2020-07-20 14:29:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:34,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 14:29:34,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:29:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 14:29:34,471 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:29:34,485 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:29:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:29:34,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:29:34,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623043177]
[2020-07-20 14:29:34,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:29:34,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 14:29:34,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102725247]
[2020-07-20 14:29:34,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 14:29:34,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:29:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 14:29:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 14:29:34,509 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states.
[2020-07-20 14:29:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:29:34,632 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions.
[2020-07-20 14:29:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-07-20 14:29:34,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-07-20 14:29:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:29:34,636 INFO L225 Difference]: With dead ends: 54
[2020-07-20 14:29:34,636 INFO L226 Difference]: Without dead ends: 52
[2020-07-20 14:29:34,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:29:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2020-07-20 14:29:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50.
[2020-07-20 14:29:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-07-20 14:29:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions.
[2020-07-20 14:29:34,652 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13
[2020-07-20 14:29:34,652 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:29:34,652 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions.
[2020-07-20 14:29:34,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 14:29:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions.
[2020-07-20 14:29:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 14:29:34,654 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 14:29:34,654 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:29:34,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:34,870 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:29:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:29:34,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1247762898, now seen corresponding path program 1 times
[2020-07-20 14:29:34,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:29:34,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139446449]
[2020-07-20 14:29:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:34,914 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:29:34,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:29:34,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 14:29:34,918 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:29:34,927 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:29:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:29:34,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:29:34,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139446449]
[2020-07-20 14:29:34,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:29:34,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 14:29:34,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229985643]
[2020-07-20 14:29:34,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 14:29:34,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:29:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 14:29:34,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 14:29:34,945 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states.
[2020-07-20 14:29:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:29:35,054 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions.
[2020-07-20 14:29:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-07-20 14:29:35,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18
[2020-07-20 14:29:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:29:35,057 INFO L225 Difference]: With dead ends: 56
[2020-07-20 14:29:35,057 INFO L226 Difference]: Without dead ends: 54
[2020-07-20 14:29:35,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:29:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-07-20 14:29:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54.
[2020-07-20 14:29:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-07-20 14:29:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions.
[2020-07-20 14:29:35,069 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18
[2020-07-20 14:29:35,070 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:29:35,070 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions.
[2020-07-20 14:29:35,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 14:29:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions.
[2020-07-20 14:29:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 14:29:35,071 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 14:29:35,071 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:29:35,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:35,286 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:29:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:29:35,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2050697988, now seen corresponding path program 1 times
[2020-07-20 14:29:35,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:29:35,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037370536]
[2020-07-20 14:29:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
[2020-07-20 14:29:35,316 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:29:35,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:35,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 14:29:35,320 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:29:35,340 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:29:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-07-20 14:29:35,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:29:35,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037370536]
[2020-07-20 14:29:35,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:29:35,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 14:29:35,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602704017]
[2020-07-20 14:29:35,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 14:29:35,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:29:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 14:29:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:29:35,364 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states.
[2020-07-20 14:29:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:29:35,495 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions.
[2020-07-20 14:29:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-07-20 14:29:35,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23
[2020-07-20 14:29:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:29:35,497 INFO L225 Difference]: With dead ends: 60
[2020-07-20 14:29:35,497 INFO L226 Difference]: Without dead ends: 58
[2020-07-20 14:29:35,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-07-20 14:29:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2020-07-20 14:29:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58.
[2020-07-20 14:29:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-07-20 14:29:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions.
[2020-07-20 14:29:35,510 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23
[2020-07-20 14:29:35,511 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:29:35,511 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions.
[2020-07-20 14:29:35,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 14:29:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions.
[2020-07-20 14:29:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-07-20 14:29:35,512 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 14:29:35,513 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:29:35,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:35,726 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:29:35,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:29:35,726 INFO L82 PathProgramCache]: Analyzing trace with hash -35497745, now seen corresponding path program 1 times
[2020-07-20 14:29:35,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:29:35,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903226928]
[2020-07-20 14:29:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:35,757 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:29:35,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:29:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 14:29:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:29:35,775 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:29:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-07-20 14:29:35,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:29:35,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903226928]
[2020-07-20 14:29:35,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:29:35,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 14:29:35,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392190565]
[2020-07-20 14:29:35,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 14:29:35,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:29:35,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 14:29:35,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 14:29:35,790 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states.
[2020-07-20 14:29:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:29:35,889 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions.
[2020-07-20 14:29:35,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-07-20 14:29:35,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28
[2020-07-20 14:29:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:29:35,891 INFO L225 Difference]: With dead ends: 65
[2020-07-20 14:29:35,891 INFO L226 Difference]: Without dead ends: 63
[2020-07-20 14:29:35,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:29:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2020-07-20 14:29:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62.
[2020-07-20 14:29:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-07-20 14:29:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions.
[2020-07-20 14:29:35,903 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28
[2020-07-20 14:29:35,903 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:29:35,903 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions.
[2020-07-20 14:29:35,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 14:29:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions.
[2020-07-20 14:29:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2020-07-20 14:29:35,905 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 14:29:35,905 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:29:36,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:36,116 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:29:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:29:36,117 INFO L82 PathProgramCache]: Analyzing trace with hash 663071772, now seen corresponding path program 1 times
[2020-07-20 14:29:36,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:29:36,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572735722]
[2020-07-20 14:29:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:36,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:29:36,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:29:36,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 14:29:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:29:36,181 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:29:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2020-07-20 14:29:36,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:29:36,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572735722]
[2020-07-20 14:29:36,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:29:36,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 14:29:36,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33377140]
[2020-07-20 14:29:36,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 14:29:36,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:29:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 14:29:36,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:29:36,204 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states.
[2020-07-20 14:29:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:29:36,350 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions.
[2020-07-20 14:29:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-07-20 14:29:36,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46
[2020-07-20 14:29:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:29:36,352 INFO L225 Difference]: With dead ends: 74
[2020-07-20 14:29:36,352 INFO L226 Difference]: Without dead ends: 72
[2020-07-20 14:29:36,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-07-20 14:29:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-07-20 14:29:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66.
[2020-07-20 14:29:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-07-20 14:29:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions.
[2020-07-20 14:29:36,365 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46
[2020-07-20 14:29:36,365 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:29:36,365 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions.
[2020-07-20 14:29:36,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 14:29:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions.
[2020-07-20 14:29:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-20 14:29:36,367 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 14:29:36,368 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:29:36,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:36,582 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:29:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:29:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash -801825860, now seen corresponding path program 1 times
[2020-07-20 14:29:36,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:29:36,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217327945]
[2020-07-20 14:29:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:36,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:29:36,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:29:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-07-20 14:29:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:29:36,665 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:29:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2020-07-20 14:29:36,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:29:36,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217327945]
[2020-07-20 14:29:36,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:29:36,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-20 14:29:36,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919094404]
[2020-07-20 14:29:36,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 14:29:36,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:29:36,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 14:29:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-07-20 14:29:36,693 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states.
[2020-07-20 14:29:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:29:36,882 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions.
[2020-07-20 14:29:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-07-20 14:29:36,883 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56
[2020-07-20 14:29:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:29:36,884 INFO L225 Difference]: With dead ends: 74
[2020-07-20 14:29:36,884 INFO L226 Difference]: Without dead ends: 72
[2020-07-20 14:29:36,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2020-07-20 14:29:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-07-20 14:29:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70.
[2020-07-20 14:29:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-07-20 14:29:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions.
[2020-07-20 14:29:36,896 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56
[2020-07-20 14:29:36,896 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:29:36,896 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions.
[2020-07-20 14:29:36,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 14:29:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions.
[2020-07-20 14:29:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2020-07-20 14:29:36,898 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 14:29:36,898 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:29:37,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:37,113 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:29:37,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:29:37,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1730547273, now seen corresponding path program 1 times
[2020-07-20 14:29:37,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:29:37,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409300714]
[2020-07-20 14:29:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:37,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:29:37,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:29:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 14:29:37,158 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:29:37,203 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:29:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked.
[2020-07-20 14:29:37,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:29:37,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409300714]
[2020-07-20 14:29:37,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:29:37,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-07-20 14:29:37,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441024320]
[2020-07-20 14:29:37,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-07-20 14:29:37,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:29:37,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-07-20 14:29:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-07-20 14:29:37,224 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states.
[2020-07-20 14:29:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:29:37,391 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions.
[2020-07-20 14:29:37,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-07-20 14:29:37,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67
[2020-07-20 14:29:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:29:37,392 INFO L225 Difference]: With dead ends: 72
[2020-07-20 14:29:37,393 INFO L226 Difference]: Without dead ends: 0
[2020-07-20 14:29:37,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132
[2020-07-20 14:29:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 14:29:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 14:29:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 14:29:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 14:29:37,395 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67
[2020-07-20 14:29:37,395 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:29:37,395 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 14:29:37,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-07-20 14:29:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 14:29:37,395 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 14:29:37,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:29:37,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 14:29:38,157 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-07-20 14:29:38,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 14:29:38,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 14:29:38,158 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-07-20 14:29:38,158 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-07-20 14:29:38,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-07-20 14:29:38,158 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed.
[2020-07-20 14:29:38,158 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed.
[2020-07-20 14:29:38,158 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed.
[2020-07-20 14:29:38,159 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed.
[2020-07-20 14:29:38,159 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,159 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed.
[2020-07-20 14:29:38,159 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed.
[2020-07-20 14:29:38,159 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 54) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0))
[2020-07-20 14:29:38,159 INFO L268 CegarLoopResult]: For program point L23-3(lines 23 54) no Hoare annotation was computed.
[2020-07-20 14:29:38,160 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,160 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0))
[2020-07-20 14:29:38,160 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed.
[2020-07-20 14:29:38,160 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed.
[2020-07-20 14:29:38,160 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 53) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0))
[2020-07-20 14:29:38,160 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed.
[2020-07-20 14:29:38,161 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed.
[2020-07-20 14:29:38,161 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,161 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0))
[2020-07-20 14:29:38,161 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0))
[2020-07-20 14:29:38,161 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0))
[2020-07-20 14:29:38,162 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,162 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,162 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed.
[2020-07-20 14:29:38,162 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,162 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed.
[2020-07-20 14:29:38,162 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed.
[2020-07-20 14:29:38,163 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed.
[2020-07-20 14:29:38,163 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,163 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true
[2020-07-20 14:29:38,163 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,163 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,164 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0))
[2020-07-20 14:29:38,164 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0))
[2020-07-20 14:29:38,164 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~j~0))
[2020-07-20 14:29:38,164 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true
[2020-07-20 14:29:38,164 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed.
[2020-07-20 14:29:38,164 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed.
[2020-07-20 14:29:38,164 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed.
[2020-07-20 14:29:38,165 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed.
[2020-07-20 14:29:38,165 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed.
[2020-07-20 14:29:38,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:29:38 BoogieIcfgContainer
[2020-07-20 14:29:38,182 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 14:29:38,185 INFO L168 Benchmark]: Toolchain (without parser) took 5238.69 ms. Allocated memory was 145.8 MB in the beginning and 246.4 MB in the end (delta: 100.7 MB). Free memory was 104.0 MB in the beginning and 215.9 MB in the end (delta: -111.9 MB). Peak memory consumption was 106.9 MB. Max. memory is 7.1 GB.
[2020-07-20 14:29:38,186 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB.
[2020-07-20 14:29:38,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.45 ms. Allocated memory is still 145.8 MB. Free memory was 103.5 MB in the beginning and 93.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
[2020-07-20 14:29:38,187 INFO L168 Benchmark]: Boogie Preprocessor took 120.72 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 93.5 MB in the beginning and 181.1 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB.
[2020-07-20 14:29:38,188 INFO L168 Benchmark]: RCFGBuilder took 376.88 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 164.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB.
[2020-07-20 14:29:38,189 INFO L168 Benchmark]: TraceAbstraction took 4481.61 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 164.0 MB in the beginning and 215.9 MB in the end (delta: -51.9 MB). Peak memory consumption was 110.3 MB. Max. memory is 7.1 GB.
[2020-07-20 14:29:38,193 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.44 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 254.45 ms. Allocated memory is still 145.8 MB. Free memory was 103.5 MB in the beginning and 93.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 120.72 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 93.5 MB in the beginning and 181.1 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 376.88 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 164.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 4481.61 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 164.0 MB in the beginning and 215.9 MB in the end (delta: -51.9 MB). Peak memory consumption was 110.3 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: 24]: Loop Invariant
Derived loop invariant: (0 <= i && limit + 4 <= bufsize) && 0 <= j
- InvariantResult [Line: 25]: Loop Invariant
Derived loop invariant: (((0 <= i && limit + 4 <= bufsize) && 0 <= j) && i < len) && j + 5 <= bufsize
- InvariantResult [Line: 23]: Loop Invariant
Derived loop invariant: 0 <= i && limit + 4 <= bufsize
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 108 SDslu, 1010 SDs, 0 SdLazy, 525 SolverSat, 129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 360 HoareAnnotationTreeSize, 55 FomulaSimplifications, 413 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 23 FomulaSimplificationsInter, 169 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 264 NumberOfCodeBlocks, 262 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23214 SizeOfPredicates, 19 NumberOfNonLiveVariables, 600 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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...