/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:29:40,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:29:40,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:29:40,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:29:40,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:29:40,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:29:40,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:29:40,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:29:40,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:29:40,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:29:40,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:29:40,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:29:40,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:29:40,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:29:40,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:29:40,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:29:40,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:29:40,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:29:40,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:29:40,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:29:40,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:29:40,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:29:40,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:29:40,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:29:40,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:29:40,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:29:40,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:29:40,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:29:40,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 14:29:40,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:29:40,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:29:40,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:29:40,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:29:40,373 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:29:40,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:29:40,374 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:29:40,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:29:40,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:29:40,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:29:40,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:29:40,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:29:40,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:29:40,375 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:29:40,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:29:40,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:29:40,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:29:40,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:29:40,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:29:40,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:29:40,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:29:40,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:29:40,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:29:40,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:29:40,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:29:40,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:29:40,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:40,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:29:40,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:29:40,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 14:29:40,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:29:40,679 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:29:40,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:29:40,684 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:29:40,685 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:29:40,685 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2020-07-20 14:29:40,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af184c0a8/9f3ce7169ee142b4b2b7435ede761cfa/FLAG034f19cb4 [2020-07-20 14:29:41,217 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:29:41,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2020-07-20 14:29:41,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af184c0a8/9f3ce7169ee142b4b2b7435ede761cfa/FLAG034f19cb4 [2020-07-20 14:29:41,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af184c0a8/9f3ce7169ee142b4b2b7435ede761cfa [2020-07-20 14:29:41,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:29:41,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:29:41,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:29:41,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:29:41,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:29:41,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29bc61ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41, skipping insertion in model container [2020-07-20 14:29:41,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:29:41,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:29:41,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:29:41,796 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:29:41,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:29:41,858 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:29:41,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41 WrapperNode [2020-07-20 14:29:41,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:29:41,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:29:41,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:29:41,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:29:41,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (1/1) ... [2020-07-20 14:29:41,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:29:41,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:29:41,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:29:41,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:29:41,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:29:42,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:29:42,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:29:42,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:29:42,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:29:42,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:29:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:29:42,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:29:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:29:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:29:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:29:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:29:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:29:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:29:42,341 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:29:42,341 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 14:29:42,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:29:42 BoogieIcfgContainer [2020-07-20 14:29:42,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:29:42,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:29:42,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:29:42,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:29:42,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:29:41" (1/3) ... [2020-07-20 14:29:42,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a180417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:29:42, skipping insertion in model container [2020-07-20 14:29:42,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:29:41" (2/3) ... [2020-07-20 14:29:42,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a180417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:29:42, skipping insertion in model container [2020-07-20 14:29:42,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:29:42" (3/3) ... [2020-07-20 14:29:42,355 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i [2020-07-20 14:29:42,365 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:29:42,372 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:29:42,389 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:29:42,414 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:29:42,414 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:29:42,414 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:29:42,414 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:29:42,414 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:29:42,415 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:29:42,415 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:29:42,415 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:29:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-07-20 14:29:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 14:29:42,443 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:29:42,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:29:42,444 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:29:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:29:42,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1626077920, now seen corresponding path program 1 times [2020-07-20 14:29:42,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:29:42,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096090277] [2020-07-20 14:29:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:42,534 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:29:42,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:29:42,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:29:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:29:42,598 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:29:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:29:42,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:29:42,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096090277] [2020-07-20 14:29:42,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:29:42,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:29:42,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326586258] [2020-07-20 14:29:42,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:29:42,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:29:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:29:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:29:42,663 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 5 states. [2020-07-20 14:29:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:29:42,862 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2020-07-20 14:29:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:29:42,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 14:29:42,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:29:42,875 INFO L225 Difference]: With dead ends: 111 [2020-07-20 14:29:42,875 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 14:29:42,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:29:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 14:29:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-07-20 14:29:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 14:29:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-07-20 14:29:42,933 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 16 [2020-07-20 14:29:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:29:42,934 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-07-20 14:29:42,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:29:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-07-20 14:29:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 14:29:42,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:29:42,936 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:29:43,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:43,145 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:29:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:29:43,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1393145919, now seen corresponding path program 1 times [2020-07-20 14:29:43,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:29:43,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082800215] [2020-07-20 14:29:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:43,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:29:43,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:29:43,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:29:43,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:29:43,218 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:29:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:29:43,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:29:43,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082800215] [2020-07-20 14:29:43,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:29:43,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:29:43,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645636430] [2020-07-20 14:29:43,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:29:43,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:29:43,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:29:43,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:29:43,260 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 6 states. [2020-07-20 14:29:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:29:43,516 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-20 14:29:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:29:43,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-20 14:29:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:29:43,521 INFO L225 Difference]: With dead ends: 62 [2020-07-20 14:29:43,521 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 14:29:43,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:29:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 14:29:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 14:29:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 14:29:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2020-07-20 14:29:43,554 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 21 [2020-07-20 14:29:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:29:43,555 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2020-07-20 14:29:43,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:29:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2020-07-20 14:29:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 14:29:43,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:29:43,557 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:29:43,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:43,765 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:29:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:29:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1101915893, now seen corresponding path program 1 times [2020-07-20 14:29:43,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:29:43,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219579121] [2020-07-20 14:29:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:43,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:29:43,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:29:43,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:29:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:29:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 14:29:43,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:29:43,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219579121] [2020-07-20 14:29:43,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:29:43,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:29:43,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294792747] [2020-07-20 14:29:43,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:29:43,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:29:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:29:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:29:43,875 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand 3 states. [2020-07-20 14:29:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:29:43,907 INFO L93 Difference]: Finished difference Result 89 states and 122 transitions. [2020-07-20 14:29:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:29:43,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-07-20 14:29:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:29:43,912 INFO L225 Difference]: With dead ends: 89 [2020-07-20 14:29:43,912 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 14:29:43,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:29:43,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 14:29:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 14:29:43,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 14:29:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2020-07-20 14:29:43,939 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 50 [2020-07-20 14:29:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:29:43,940 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2020-07-20 14:29:43,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:29:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2020-07-20 14:29:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 14:29:43,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:29:43,944 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:29:44,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:44,160 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:29:44,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:29:44,161 INFO L82 PathProgramCache]: Analyzing trace with hash 668905142, now seen corresponding path program 1 times [2020-07-20 14:29:44,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:29:44,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054207575] [2020-07-20 14:29:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:44,210 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:29:44,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:29:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:29:44,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:29:44,261 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:29:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 14:29:44,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:29:44,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054207575] [2020-07-20 14:29:44,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:29:44,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:29:44,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072000784] [2020-07-20 14:29:44,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:29:44,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:29:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:29:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:29:44,293 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2020-07-20 14:29:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:29:44,441 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-07-20 14:29:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:29:44,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-07-20 14:29:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:29:44,443 INFO L225 Difference]: With dead ends: 67 [2020-07-20 14:29:44,443 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 14:29:44,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:29:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 14:29:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-07-20 14:29:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 14:29:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2020-07-20 14:29:44,456 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 51 [2020-07-20 14:29:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:29:44,457 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2020-07-20 14:29:44,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:29:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2020-07-20 14:29:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 14:29:44,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:29:44,460 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:29:44,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:44,674 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:29:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:29:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash -702087769, now seen corresponding path program 1 times [2020-07-20 14:29:44,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:29:44,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645181237] [2020-07-20 14:29:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:44,730 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:29:44,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:29:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:29:44,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:29:44,756 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:29:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-20 14:29:44,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:29:44,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645181237] [2020-07-20 14:29:44,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:29:44,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:29:44,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441111270] [2020-07-20 14:29:44,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:29:44,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:29:44,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:29:44,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:29:44,782 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 6 states. [2020-07-20 14:29:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:29:44,858 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-07-20 14:29:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:29:44,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-07-20 14:29:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:29:44,861 INFO L225 Difference]: With dead ends: 73 [2020-07-20 14:29:44,861 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 14:29:44,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:29:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 14:29:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-07-20 14:29:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 14:29:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-07-20 14:29:44,874 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 86 [2020-07-20 14:29:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:29:44,875 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-07-20 14:29:44,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:29:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-07-20 14:29:44,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 14:29:44,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:29:44,878 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:29:45,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:45,095 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:29:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:29:45,096 INFO L82 PathProgramCache]: Analyzing trace with hash 58209754, now seen corresponding path program 1 times [2020-07-20 14:29:45,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:29:45,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235264449] [2020-07-20 14:29:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:45,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:29:45,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:29:45,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:29:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:29:45,174 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:29:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-20 14:29:45,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:29:45,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235264449] [2020-07-20 14:29:45,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:29:45,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:29:45,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687474774] [2020-07-20 14:29:45,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:29:45,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:29:45,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:29:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:29:45,219 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 6 states. [2020-07-20 14:29:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:29:45,306 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-07-20 14:29:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:29:45,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-07-20 14:29:45,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:29:45,309 INFO L225 Difference]: With dead ends: 74 [2020-07-20 14:29:45,309 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 14:29:45,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:29:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 14:29:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 14:29:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 14:29:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 14:29:45,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2020-07-20 14:29:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:29:45,314 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 14:29:45,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:29:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 14:29:45,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 14:29:45,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:29:45,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 14:29:45,993 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 14:29:45,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:29:45,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:29:45,993 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 14:29:45,993 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 14:29:45,994 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:29:45,994 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:29:45,994 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 14:29:45,994 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:29:45,994 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:29:45,995 INFO L264 CegarLoopResult]: At program point L60(line 60) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:45,996 INFO L264 CegarLoopResult]: At program point L60-1(line 60) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:45,996 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 72) no Hoare annotation was computed. [2020-07-20 14:29:45,996 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:45,996 INFO L264 CegarLoopResult]: At program point L52-1(line 52) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:45,997 INFO L264 CegarLoopResult]: At program point L36-1(lines 35 41) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 14:29:45,998 INFO L264 CegarLoopResult]: At program point L36-2(lines 36 41) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 14:29:45,998 INFO L264 CegarLoopResult]: At program point L61(line 61) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:45,998 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:45,998 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:45,999 INFO L271 CegarLoopResult]: At program point L70(lines 14 72) the Hoare annotation is: true [2020-07-20 14:29:45,999 INFO L268 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-07-20 14:29:45,999 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:45,999 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-07-20 14:29:46,000 INFO L264 CegarLoopResult]: At program point L54-1(lines 53 66) the Hoare annotation is: (and (<= 0 main_~c~0) (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 14:29:46,000 INFO L268 CegarLoopResult]: For program point L46(lines 33 69) no Hoare annotation was computed. [2020-07-20 14:29:46,000 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 72) no Hoare annotation was computed. [2020-07-20 14:29:46,001 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:46,001 INFO L264 CegarLoopResult]: At program point L38-1(line 38) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:46,001 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 72) the Hoare annotation is: true [2020-07-20 14:29:46,001 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-20 14:29:46,001 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 14:29:46,002 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 14:29:46,002 INFO L264 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 14:29:46,002 INFO L264 CegarLoopResult]: At program point L56(line 56) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~c~0) (< (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:46,002 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-07-20 14:29:46,002 INFO L264 CegarLoopResult]: At program point L56-1(line 56) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= 0 main_~c~0) (< (+ main_~c~0 1) main_~tokenlen~0) (<= 0 main_~scheme~0) (<= .cse0 main_~urilen~0) (<= 1 main_~cp~0) (not (= .cse0 main_~urilen~0)))) [2020-07-20 14:29:46,003 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-07-20 14:29:46,003 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-07-20 14:29:46,003 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-20 14:29:46,003 INFO L268 CegarLoopResult]: For program point L24-1(lines 14 72) no Hoare annotation was computed. [2020-07-20 14:29:46,003 INFO L268 CegarLoopResult]: For program point L33(lines 33 69) no Hoare annotation was computed. [2020-07-20 14:29:46,003 INFO L268 CegarLoopResult]: For program point L58(lines 58 64) no Hoare annotation was computed. [2020-07-20 14:29:46,003 INFO L268 CegarLoopResult]: For program point L25(lines 14 72) no Hoare annotation was computed. [2020-07-20 14:29:46,003 INFO L268 CegarLoopResult]: For program point L58-1(lines 58 64) no Hoare annotation was computed. [2020-07-20 14:29:46,004 INFO L268 CegarLoopResult]: For program point L50(lines 50 68) no Hoare annotation was computed. [2020-07-20 14:29:46,004 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 14:29:46,004 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 14:29:46,004 INFO L264 CegarLoopResult]: At program point L34-1(line 34) the Hoare annotation is: (and (<= 0 main_~scheme~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 1 main_~cp~0)) [2020-07-20 14:29:46,004 INFO L268 CegarLoopResult]: For program point L26(lines 14 72) no Hoare annotation was computed. [2020-07-20 14:29:46,004 INFO L268 CegarLoopResult]: For program point L43(lines 33 69) no Hoare annotation was computed. [2020-07-20 14:29:46,005 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 14:29:46,005 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 14:29:46,005 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 14:29:46,005 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 14:29:46,005 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 14:29:46,006 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 14:29:46,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:29:46 BoogieIcfgContainer [2020-07-20 14:29:46,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:29:46,031 INFO L168 Benchmark]: Toolchain (without parser) took 4446.74 ms. Allocated memory was 145.8 MB in the beginning and 245.9 MB in the end (delta: 100.1 MB). Free memory was 103.7 MB in the beginning and 152.9 MB in the end (delta: -49.3 MB). Peak memory consumption was 50.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:29:46,032 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 14:29:46,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.64 ms. Allocated memory is still 145.8 MB. Free memory was 103.5 MB in the beginning and 93.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:29:46,034 INFO L168 Benchmark]: Boogie Preprocessor took 117.27 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 93.0 MB in the beginning and 180.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:29:46,035 INFO L168 Benchmark]: RCFGBuilder took 369.66 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 160.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:29:46,036 INFO L168 Benchmark]: TraceAbstraction took 3680.96 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 160.0 MB in the beginning and 152.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 51.1 MB. Max. memory is 7.1 GB. [2020-07-20 14:29:46,040 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.64 ms. Allocated memory is still 145.8 MB. Free memory was 103.5 MB in the beginning and 93.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.27 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 93.0 MB in the beginning and 180.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.66 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 160.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3680.96 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 160.0 MB in the beginning and 152.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 51.1 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (0 <= scheme && cp + 1 <= urilen) && 1 <= cp - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: ((0 <= c && 0 <= scheme) && cp + 1 <= urilen) && 1 <= cp - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.1s, OverallIterations: 6, TraceHistogramMax: 14, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 390 SDtfs, 90 SDslu, 854 SDs, 0 SdLazy, 312 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 26 LocationsWithAnnotation, 76 PreInvPairs, 102 NumberOfFragments, 375 HoareAnnotationTreeSize, 76 FomulaSimplifications, 218 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 26 FomulaSimplificationsInter, 83 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 315 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 309 ConstructedInterpolants, 0 QuantifiedInterpolants, 30129 SizeOfPredicates, 15 NumberOfNonLiveVariables, 638 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 772/772 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...