/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/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:53:02,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:53:02,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:53:02,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:53:02,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:53:02,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:53:02,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:53:02,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:53:02,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:53:02,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:53:02,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:53:02,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:53:02,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:53:02,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:53:02,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:53:02,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:53:02,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:53:02,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:53:02,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:53:02,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:53:02,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:53:02,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:53:02,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:53:02,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:53:02,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:53:02,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:53:02,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:53:02,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:53:02,983 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 11:53:02,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:53:02,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:53:02,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:53:02,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:53:02,999 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:53:02,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:53:02,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:53:03,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:53:03,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:53:03,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:53:03,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:53:03,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:53:03,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:53:03,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:53:03,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:53:03,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:53:03,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:53:03,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:53:03,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:53:03,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:53:03,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:53:03,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:53:03,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:53:03,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:53:03,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:53:03,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:53:03,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:53:03,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:53:03,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:53:03,004 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 11:53:03,259 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:53:03,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:53:03,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:53:03,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:53:03,277 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:53:03,277 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-07-20 11:53:03,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb13eed8/b7deb7ff82cf46039978808a370fc8b7/FLAGb57e4952d [2020-07-20 11:53:03,816 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:53:03,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-07-20 11:53:03,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb13eed8/b7deb7ff82cf46039978808a370fc8b7/FLAGb57e4952d [2020-07-20 11:53:04,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb13eed8/b7deb7ff82cf46039978808a370fc8b7 [2020-07-20 11:53:04,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:53:04,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:53:04,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:53:04,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:53:04,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:53:04,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3675969c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04, skipping insertion in model container [2020-07-20 11:53:04,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:53:04,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:53:04,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:53:04,417 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:53:04,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:53:04,450 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:53:04,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04 WrapperNode [2020-07-20 11:53:04,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:53:04,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:53:04,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:53:04,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:53:04,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (1/1) ... [2020-07-20 11:53:04,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:53:04,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:53:04,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:53:04,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:53:04,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (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 11:53:04,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:53:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:53:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:53:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:53:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:53:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:53:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:53:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:53:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:53:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:53:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:53:04,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:53:04,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:53:04,902 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:53:04,902 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 11:53:04,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:53:04 BoogieIcfgContainer [2020-07-20 11:53:04,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:53:04,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:53:04,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:53:04,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:53:04,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:53:04" (1/3) ... [2020-07-20 11:53:04,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d97be1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:53:04, skipping insertion in model container [2020-07-20 11:53:04,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:04" (2/3) ... [2020-07-20 11:53:04,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d97be1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:53:04, skipping insertion in model container [2020-07-20 11:53:04,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:53:04" (3/3) ... [2020-07-20 11:53:04,918 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-07-20 11:53:04,931 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:53:04,940 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:53:04,957 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:53:04,989 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:53:04,989 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:53:04,989 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:53:04,989 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:53:04,989 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:53:04,990 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:53:04,990 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:53:04,990 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:53:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-20 11:53:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:53:05,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:53:05,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:53:05,026 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:53:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:53:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -234903868, now seen corresponding path program 1 times [2020-07-20 11:53:05,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:53:05,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947063314] [2020-07-20 11:53:05,044 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 11:53:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:53:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:53:05,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:53:05,124 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 11:53:05,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:53:05,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947063314] [2020-07-20 11:53:05,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:53:05,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:53:05,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286655768] [2020-07-20 11:53:05,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:53:05,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:53:05,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:53:05,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:53:05,146 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-07-20 11:53:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:53:05,177 INFO L93 Difference]: Finished difference Result 87 states and 156 transitions. [2020-07-20 11:53:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:53:05,179 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-20 11:53:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:53:05,187 INFO L225 Difference]: With dead ends: 87 [2020-07-20 11:53:05,188 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:53:05,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 11:53:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:53:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 11:53:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 11:53:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-07-20 11:53:05,240 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 12 [2020-07-20 11:53:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:53:05,240 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-07-20 11:53:05,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:53:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-07-20 11:53:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:53:05,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:53:05,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:53:05,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:53:05,445 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:53:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:53:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1276958999, now seen corresponding path program 1 times [2020-07-20 11:53:05,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:53:05,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281737074] [2020-07-20 11:53:05,448 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 11:53:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:53:05,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:53:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:53:05,525 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:53:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:53:05,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:53:05,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281737074] [2020-07-20 11:53:05,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:53:05,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:53:05,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315353220] [2020-07-20 11:53:05,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:53:05,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:53:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:53:05,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:53:05,599 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-07-20 11:53:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:53:05,823 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2020-07-20 11:53:05,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:53:05,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:53:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:53:05,825 INFO L225 Difference]: With dead ends: 48 [2020-07-20 11:53:05,826 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 11:53:05,827 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 11:53:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 11:53:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-20 11:53:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:53:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-20 11:53:05,843 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 13 [2020-07-20 11:53:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:53:05,845 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-20 11:53:05,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:53:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-20 11:53:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:53:05,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:53:05,847 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 11:53:06,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:53:06,061 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:53:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:53:06,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1880963538, now seen corresponding path program 1 times [2020-07-20 11:53:06,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:53:06,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819931737] [2020-07-20 11:53:06,063 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 11:53:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:53:06,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:53:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:53:06,117 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:53:06,139 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 11:53:06,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:53:06,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819931737] [2020-07-20 11:53:06,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:53:06,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:53:06,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814141299] [2020-07-20 11:53:06,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:53:06,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:53:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:53:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:53:06,144 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 5 states. [2020-07-20 11:53:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:53:06,264 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-07-20 11:53:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:53:06,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-20 11:53:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:53:06,267 INFO L225 Difference]: With dead ends: 52 [2020-07-20 11:53:06,267 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 11:53:06,268 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 11:53:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 11:53:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 11:53:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:53:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-07-20 11:53:06,288 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2020-07-20 11:53:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:53:06,289 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-07-20 11:53:06,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:53:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-07-20 11:53:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:53:06,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:53:06,291 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:53:06,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:53:06,507 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:53:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:53:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash 996212544, now seen corresponding path program 1 times [2020-07-20 11:53:06,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:53:06,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355070508] [2020-07-20 11:53:06,510 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 11:53:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:53:06,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:53:06,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:53:06,568 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:53:06,573 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:53:06,595 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 11:53:06,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:53:06,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355070508] [2020-07-20 11:53:06,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:53:06,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:53:06,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039013034] [2020-07-20 11:53:06,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:53:06,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:53:06,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:53:06,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:53:06,599 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-07-20 11:53:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:53:06,709 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2020-07-20 11:53:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:53:06,709 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-07-20 11:53:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:53:06,711 INFO L225 Difference]: With dead ends: 55 [2020-07-20 11:53:06,711 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 11:53:06,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:53:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 11:53:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-07-20 11:53:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 11:53:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-07-20 11:53:06,722 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 19 [2020-07-20 11:53:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:53:06,722 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-07-20 11:53:06,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:53:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-07-20 11:53:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 11:53:06,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:53:06,725 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:53:06,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:53:06,938 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:53:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:53:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash -381964826, now seen corresponding path program 1 times [2020-07-20 11:53:06,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:53:06,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45523491] [2020-07-20 11:53:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:53:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:53:06,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:53:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:53:07,041 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:53:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:53:07,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:53:07,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:53:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 11:53:07,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45523491] [2020-07-20 11:53:07,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:53:07,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-07-20 11:53:07,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607621166] [2020-07-20 11:53:07,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:53:07,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:53:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:53:07,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:53:07,142 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 10 states. [2020-07-20 11:53:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:53:07,378 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2020-07-20 11:53:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:53:07,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-07-20 11:53:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:53:07,379 INFO L225 Difference]: With dead ends: 75 [2020-07-20 11:53:07,379 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:53:07,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:53:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:53:07,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:53:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:53:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:53:07,382 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-07-20 11:53:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:53:07,383 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:53:07,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:53:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:53:07,383 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:53:07,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:53:07,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:53:07,898 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:53:07,898 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:53:07,898 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:53:07,898 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:53:07,898 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:53:07,899 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:53:07,899 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 11:53:07,899 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 11:53:07,899 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 11:53:07,899 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 11:53:07,899 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-20 11:53:07,900 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-20 11:53:07,900 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 66) no Hoare annotation was computed. [2020-07-20 11:53:07,900 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,900 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,900 INFO L268 CegarLoopResult]: For program point L48(lines 48 52) no Hoare annotation was computed. [2020-07-20 11:53:07,901 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-20 11:53:07,901 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,901 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,901 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,901 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,902 INFO L264 CegarLoopResult]: At program point L37-2(lines 37 61) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,902 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,902 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,902 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,903 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 33) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,903 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 33) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,903 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-07-20 11:53:07,903 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 66) no Hoare annotation was computed. [2020-07-20 11:53:07,903 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-20 11:53:07,904 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,904 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true [2020-07-20 11:53:07,904 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,904 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true [2020-07-20 11:53:07,904 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,904 INFO L268 CegarLoopResult]: For program point L59(line 59) no Hoare annotation was computed. [2020-07-20 11:53:07,905 INFO L268 CegarLoopResult]: For program point L55(lines 55 57) no Hoare annotation was computed. [2020-07-20 11:53:07,905 INFO L268 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-07-20 11:53:07,905 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 11:53:07,905 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-07-20 11:53:07,905 INFO L268 CegarLoopResult]: For program point L43(lines 43 57) no Hoare annotation was computed. [2020-07-20 11:53:07,905 INFO L264 CegarLoopResult]: At program point L43-1(lines 43 57) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,906 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,906 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-20 11:53:07,906 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-07-20 11:53:07,906 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 11:53:07,906 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 11:53:07,907 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 11:53:07,907 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 11:53:07,907 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 11:53:07,907 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 11:53:07,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:53:07 BoogieIcfgContainer [2020-07-20 11:53:07,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:53:07,928 INFO L168 Benchmark]: Toolchain (without parser) took 3728.92 ms. Allocated memory was 137.4 MB in the beginning and 232.3 MB in the end (delta: 94.9 MB). Free memory was 100.4 MB in the beginning and 102.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 92.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:07,929 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:53:07,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.38 ms. Allocated memory is still 137.4 MB. Free memory was 100.0 MB in the beginning and 90.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:07,931 INFO L168 Benchmark]: Boogie Preprocessor took 129.49 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 179.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:07,932 INFO L168 Benchmark]: RCFGBuilder took 325.84 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 162.9 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:07,933 INFO L168 Benchmark]: TraceAbstraction took 3016.49 ms. Allocated memory was 201.3 MB in the beginning and 232.3 MB in the end (delta: 30.9 MB). Free memory was 162.3 MB in the beginning and 102.7 MB in the end (delta: 59.5 MB). Peak memory consumption was 90.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:53:07,937 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 137.4 MB. Free memory was 119.2 MB in the beginning and 118.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.38 ms. Allocated memory is still 137.4 MB. Free memory was 100.0 MB in the beginning and 90.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.49 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 179.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.84 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 162.9 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3016.49 ms. Allocated memory was 201.3 MB in the beginning and 232.3 MB in the end (delta: 30.9 MB). Free memory was 162.3 MB in the beginning and 102.7 MB in the end (delta: 59.5 MB). Peak memory consumption was 90.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 0 <= t - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 0 <= t - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 64 SDslu, 583 SDs, 0 SdLazy, 320 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 69 PreInvPairs, 105 NumberOfFragments, 132 HoareAnnotationTreeSize, 69 FomulaSimplifications, 163 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 24 FomulaSimplificationsInter, 71 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 8022 SizeOfPredicates, 8 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 42/46 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...