/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-1.c
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This is Ultimate 0.1.25-d623d84
[2020-07-20 11:30:21,016 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 11:30:21,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 11:30:21,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 11:30:21,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 11:30:21,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 11:30:21,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 11:30:21,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 11:30:21,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 11:30:21,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 11:30:21,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 11:30:21,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 11:30:21,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 11:30:21,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 11:30:21,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 11:30:21,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 11:30:21,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 11:30:21,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 11:30:21,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 11:30:21,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 11:30:21,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 11:30:21,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 11:30:21,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 11:30:21,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 11:30:21,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 11:30:21,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 11:30:21,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-07-20 11:30:21,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 11:30:21,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-20 11:30:21,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
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[2020-07-20 11:30:21,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 11:30:21,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 11:30:21,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-07-20 11:30:21,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 11:30:21,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 11:30:21,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 11:30:21,133 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 11:30:21,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 11:30:21,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 11:30:21,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 11:30:21,137 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 11:30:21,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 11:30:21,138 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 11:30:21,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 11:30:21,139 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 11:30:21,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 11:30:21,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 11:30:21,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 11:30:21,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 11:30:21,140 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 11:30:21,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 11:30:21,141 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 11:30:21,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 11:30:21,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 11:30:21,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 11:30:21,142 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 11:30:21,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 11:30:21,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 11:30:21,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 11:30:21,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 11:30:21,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 11:30:21,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 11:30:21,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:21,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 11:30:21,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 11:30:21,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY
[2020-07-20 11:30:21,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 11:30:21,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 11:30:21,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 11:30:21,440 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 11:30:21,441 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 11:30:21,442 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c
[2020-07-20 11:30:21,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab967dee5/23e76bb936344784879ea4187b841a03/FLAGbfcda5c9f
[2020-07-20 11:30:21,932 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 11:30:21,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c
[2020-07-20 11:30:21,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab967dee5/23e76bb936344784879ea4187b841a03/FLAGbfcda5c9f
[2020-07-20 11:30:22,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab967dee5/23e76bb936344784879ea4187b841a03
[2020-07-20 11:30:22,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 11:30:22,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 11:30:22,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 11:30:22,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 11:30:22,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 11:30:22,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70234fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22, skipping insertion in model container
[2020-07-20 11:30:22,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 11:30:22,373 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 11:30:22,585 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 11:30:22,593 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 11:30:22,611 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 11:30:22,627 INFO L208 MainTranslator]: Completed translation
[2020-07-20 11:30:22,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22 WrapperNode
[2020-07-20 11:30:22,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 11:30:22,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 11:30:22,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 11:30:22,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 11:30:22,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ...
[2020-07-20 11:30:22,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 11:30:22,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 11:30:22,759 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 11:30:22,759 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 11:30:22,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 11:30:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 11:30:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 11:30:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure check
[2020-07-20 11:30:22,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 11:30:22,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 11:30:22,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 11:30:22,819 INFO L130 BoogieDeclarations]: Found specification of procedure check
[2020-07-20 11:30:22,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 11:30:22,819 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 11:30:22,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 11:30:22,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 11:30:22,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 11:30:22,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 11:30:22,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 11:30:23,045 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 11:30:23,045 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 11:30:23,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:23 BoogieIcfgContainer
[2020-07-20 11:30:23,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 11:30:23,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 11:30:23,052 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 11:30:23,055 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 11:30:23,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:30:22" (1/3) ...
[2020-07-20 11:30:23,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655453b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:23, skipping insertion in model container
[2020-07-20 11:30:23,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:30:22" (2/3) ...
[2020-07-20 11:30:23,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655453b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:23, skipping insertion in model container
[2020-07-20 11:30:23,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:23" (3/3) ...
[2020-07-20 11:30:23,059 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-1.c
[2020-07-20 11:30:23,071 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 11:30:23,079 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 11:30:23,096 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 11:30:23,151 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 11:30:23,151 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 11:30:23,152 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 11:30:23,152 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 11:30:23,152 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 11:30:23,152 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 11:30:23,152 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 11:30:23,152 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 11:30:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states.
[2020-07-20 11:30:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-20 11:30:23,185 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:30:23,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:30:23,186 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:30:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:30:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 149844724, now seen corresponding path program 1 times
[2020-07-20 11:30:23,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:30:23,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136544915]
[2020-07-20 11:30:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:30:23,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 11:30:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:30:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 11:30:23,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:30:23,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136544915]
[2020-07-20 11:30:23,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:30:23,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 11:30:23,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842977545]
[2020-07-20 11:30:23,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 11:30:23,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:30:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 11:30:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 11:30:23,348 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states.
[2020-07-20 11:30:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:30:23,369 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions.
[2020-07-20 11:30:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-07-20 11:30:23,370 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15
[2020-07-20 11:30:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:30:23,378 INFO L225 Difference]: With dead ends: 35
[2020-07-20 11:30:23,378 INFO L226 Difference]: Without dead ends: 17
[2020-07-20 11:30:23,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 11:30:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2020-07-20 11:30:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2020-07-20 11:30:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2020-07-20 11:30:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2020-07-20 11:30:23,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15
[2020-07-20 11:30:23,418 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:30:23,418 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2020-07-20 11:30:23,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 11:30:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2020-07-20 11:30:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-07-20 11:30:23,419 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:30:23,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:30:23,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:23,636 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:30:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:30:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1249419983, now seen corresponding path program 1 times
[2020-07-20 11:30:23,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:30:23,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522181045]
[2020-07-20 11:30:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:30:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-07-20 11:30:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:30:23,785 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23
[2020-07-20 11:30:23,785 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-07-20 11:30:23,828 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 11:30:23,831 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-07-20 11:30:23,832 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:52
[2020-07-20 11:30:23,881 INFO L173 IndexEqualityManager]: detected equality via solver
[2020-07-20 11:30:23,888 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 11:30:23,889 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21
[2020-07-20 11:30:23,893 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-07-20 11:30:23,906 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 11:30:23,909 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts.
[2020-07-20 11:30:23,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30
[2020-07-20 11:30:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 11:30:23,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:30:23,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522181045]
[2020-07-20 11:30:23,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:30:23,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 11:30:23,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857910597]
[2020-07-20 11:30:23,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 11:30:23,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:30:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 11:30:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 11:30:23,947 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states.
[2020-07-20 11:30:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:30:24,039 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions.
[2020-07-20 11:30:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-07-20 11:30:24,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16
[2020-07-20 11:30:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:30:24,041 INFO L225 Difference]: With dead ends: 27
[2020-07-20 11:30:24,041 INFO L226 Difference]: Without dead ends: 19
[2020-07-20 11:30:24,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 11:30:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2020-07-20 11:30:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2020-07-20 11:30:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2020-07-20 11:30:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions.
[2020-07-20 11:30:24,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16
[2020-07-20 11:30:24,050 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:30:24,050 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions.
[2020-07-20 11:30:24,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 11:30:24,051 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions.
[2020-07-20 11:30:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 11:30:24,051 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:30:24,052 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 11:30:24,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:24,266 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:30:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:30:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1840889772, now seen corresponding path program 1 times
[2020-07-20 11:30:24,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:30:24,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642586167]
[2020-07-20 11:30:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:30:24,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-07-20 11:30:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:30:24,338 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23
[2020-07-20 11:30:24,339 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-07-20 11:30:24,358 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 11:30:24,360 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-07-20 11:30:24,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:52
[2020-07-20 11:30:24,410 INFO L173 IndexEqualityManager]: detected equality via solver
[2020-07-20 11:30:24,413 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 11:30:24,414 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21
[2020-07-20 11:30:24,416 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-07-20 11:30:24,425 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 11:30:24,427 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts.
[2020-07-20 11:30:24,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30
[2020-07-20 11:30:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 11:30:24,455 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 11:30:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 11:30:24,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642586167]
[2020-07-20 11:30:24,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 11:30:24,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8
[2020-07-20 11:30:24,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944997760]
[2020-07-20 11:30:24,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-07-20 11:30:24,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:30:24,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-07-20 11:30:24,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2020-07-20 11:30:24,543 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states.
[2020-07-20 11:30:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:30:24,686 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions.
[2020-07-20 11:30:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-07-20 11:30:24,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18
[2020-07-20 11:30:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:30:24,687 INFO L225 Difference]: With dead ends: 33
[2020-07-20 11:30:24,688 INFO L226 Difference]: Without dead ends: 25
[2020-07-20 11:30:24,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132
[2020-07-20 11:30:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2020-07-20 11:30:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2020-07-20 11:30:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2020-07-20 11:30:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions.
[2020-07-20 11:30:24,694 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18
[2020-07-20 11:30:24,695 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:30:24,695 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions.
[2020-07-20 11:30:24,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-07-20 11:30:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions.
[2020-07-20 11:30:24,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 11:30:24,696 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:30:24,696 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:30:24,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:24,910 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:30:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:30:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1976792733, now seen corresponding path program 2 times
[2020-07-20 11:30:24,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:30:24,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556501299]
[2020-07-20 11:30:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:30:24,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core
[2020-07-20 11:30:24,972 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:30:24,990 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21
[2020-07-20 11:30:24,991 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-07-20 11:30:25,006 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 11:30:25,006 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-07-20 11:30:25,007 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34
[2020-07-20 11:30:27,183 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#ad1~0.base_BEFORE_CALL_1| Int) (|v_main_~#ad1~0.offset_BEFORE_CALL_1| Int) (main_~pa~0.offset Int)) (and (= 0 (mod (+ (* |v_main_~#ad1~0.offset_BEFORE_CALL_1| 7) main_~pa~0.offset) 8)) (let ((.cse0 (div (+ (* |v_main_~#ad1~0.offset_BEFORE_CALL_1| (- 1)) main_~pa~0.offset) 8))) (= .cse0 (select (select |c_#memory_int| |v_main_~#ad1~0.base_BEFORE_CALL_1|) (+ |v_main_~#ad1~0.offset_BEFORE_CALL_1| (* .cse0 8))))))) is different from true
[2020-07-20 11:30:37,381 WARN L193 SmtUtils]: Spent 10.15 s on a formula simplification. DAG size of input: 38 DAG size of output: 38
[2020-07-20 11:30:37,403 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 11:30:37,413 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 11:30:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2020-07-20 11:30:37,476 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 11:30:37,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 11:30:37,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 11:30:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2020-07-20 11:30:37,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556501299]
[2020-07-20 11:30:37,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 11:30:37,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16
[2020-07-20 11:30:37,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654718235]
[2020-07-20 11:30:37,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-07-20 11:30:37,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:30:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-07-20 11:30:37,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=169, Unknown=1, NotChecked=26, Total=240
[2020-07-20 11:30:37,856 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states.
[2020-07-20 11:30:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:30:38,215 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions.
[2020-07-20 11:30:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-07-20 11:30:38,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24
[2020-07-20 11:30:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:30:38,216 INFO L225 Difference]: With dead ends: 25
[2020-07-20 11:30:38,217 INFO L226 Difference]: Without dead ends: 0
[2020-07-20 11:30:38,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=74, Invalid=235, Unknown=1, NotChecked=32, Total=342
[2020-07-20 11:30:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 11:30:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 11:30:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 11:30:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 11:30:38,219 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24
[2020-07-20 11:30:38,219 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:30:38,219 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 11:30:38,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-07-20 11:30:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 11:30:38,220 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 11:30:38,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:30:38,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 11:30:38,537 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed.
[2020-07-20 11:30:38,538 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true
[2020-07-20 11:30:38,538 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 11:30:38,538 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 11:30:38,538 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-07-20 11:30:38,538 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-07-20 11:30:38,538 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-07-20 11:30:38,539 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed.
[2020-07-20 11:30:38,539 INFO L268 CegarLoopResult]: For program point L29-1(lines 29 31) no Hoare annotation was computed.
[2020-07-20 11:30:38,539 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 38) no Hoare annotation was computed.
[2020-07-20 11:30:38,540 INFO L268 CegarLoopResult]: For program point L21(lines 21 32) no Hoare annotation was computed.
[2020-07-20 11:30:38,540 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 32) no Hoare annotation was computed.
[2020-07-20 11:30:38,540 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 38) no Hoare annotation was computed.
[2020-07-20 11:30:38,541 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed.
[2020-07-20 11:30:38,541 INFO L264 CegarLoopResult]: At program point L30(lines 15 38) the Hoare annotation is: false
[2020-07-20 11:30:38,545 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 38) the Hoare annotation is: true
[2020-07-20 11:30:38,545 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 28) no Hoare annotation was computed.
[2020-07-20 11:30:38,546 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 28) the Hoare annotation is: (and (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (let ((.cse0 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* .cse0 8) |main_~#ad1~0.offset|)) .cse0)) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (= main_~pa~0.base |main_~#ad1~0.base|))
[2020-07-20 11:30:38,546 INFO L264 CegarLoopResult]: At program point L26-4(lines 26 28) the Hoare annotation is: (and (let ((.cse0 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* .cse0 8) |main_~#ad1~0.offset|)) .cse0)) (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (= main_~pa~0.base |main_~#ad1~0.base|) (exists ((main_~pa~0.offset Int)) (let ((.cse1 (select |#memory_int| |main_~#ad1~0.base|))) (let ((.cse3 (select .cse1 main_~pa~0.offset))) (and (let ((.cse2 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select .cse1 (+ (* .cse2 8) |main_~#ad1~0.offset|)) .cse2)) (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (<= main_~i~0 .cse3) (<= .cse3 main_~i~0))))))
[2020-07-20 11:30:38,559 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 9 12) the Hoare annotation is: true
[2020-07-20 11:30:38,559 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 9 12) no Hoare annotation was computed.
[2020-07-20 11:30:38,559 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 9 12) no Hoare annotation was computed.
[2020-07-20 11:30:38,570 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 11:30:38,571 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 11:30:38,577 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 11:30:38,577 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 11:30:38,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:30:38 BoogieIcfgContainer
[2020-07-20 11:30:38,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 11:30:38,582 INFO L168 Benchmark]: Toolchain (without parser) took 16239.65 ms. Allocated memory was 145.8 MB in the beginning and 244.8 MB in the end (delta: 99.1 MB). Free memory was 102.1 MB in the beginning and 217.9 MB in the end (delta: -115.8 MB). Peak memory consumption was 107.4 MB. Max. memory is 7.1 GB.
[2020-07-20 11:30:38,583 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
[2020-07-20 11:30:38,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.20 ms. Allocated memory is still 145.8 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB.
[2020-07-20 11:30:38,585 INFO L168 Benchmark]: Boogie Preprocessor took 129.96 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 91.5 MB in the beginning and 181.0 MB in the end (delta: -89.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
[2020-07-20 11:30:38,586 INFO L168 Benchmark]: RCFGBuilder took 291.96 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 166.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB.
[2020-07-20 11:30:38,587 INFO L168 Benchmark]: TraceAbstraction took 15528.11 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 166.5 MB in the beginning and 217.9 MB in the end (delta: -51.4 MB). Peak memory consumption was 114.0 MB. Max. memory is 7.1 GB.
[2020-07-20 11:30:38,591 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 284.20 ms. Allocated memory is still 145.8 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 129.96 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 91.5 MB in the beginning and 181.0 MB in the end (delta: -89.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 291.96 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 166.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 15528.11 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 166.5 MB in the beginning and 217.9 MB in the end (delta: -51.4 MB). Peak memory consumption was 114.0 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator:
- GenericResult: Unfinished Backtranslation
unknown boogie variable #memory_int
- GenericResult: Unfinished Backtranslation
unknown boogie variable #memory_int
- GenericResult: Unfinished Backtranslation
unknown boogie variable #memory_int
- GenericResult: Unfinished Backtranslation
unknown boogie variable #memory_int
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 36]: 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: 26]: Loop Invariant
[2020-07-20 11:30:38,600 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 11:30:38,600 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 11:30:38,601 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 11:30:38,601 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int
Derived loop invariant: ((0 == (pa + ad1 * 7) % 8 && unknown-#memory_int-unknown[ad1][(pa + ad1 * -1) / 8 * 8 + ad1] == (pa + ad1 * -1) / 8) && i <= unknown-#memory_int-unknown[pa][pa]) && pa == ad1
- InvariantResult [Line: 15]: Loop Invariant
Derived loop invariant: 0
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.2s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 8 SDslu, 114 SDs, 0 SdLazy, 78 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 11 PreInvPairs, 16 NumberOfFragments, 140 HoareAnnotationTreeSize, 11 FomulaSimplifications, 290 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 70 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 73 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 109 ConstructedInterpolants, 19 QuantifiedInterpolants, 26614 SizeOfPredicates, 34 NumberOfNonLiveVariables, 343 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 25/44 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...