/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:14:17,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:14:17,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:14:17,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:14:17,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:14:17,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:14:17,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:14:17,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:14:17,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:14:17,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:14:17,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:14:17,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:14:17,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:14:17,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:14:17,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:14:17,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:14:17,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:14:17,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:14:17,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:14:17,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:14:17,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:14:17,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:14:17,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:14:17,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:14:17,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:14:17,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:14:17,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:14:17,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:14:17,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:14:17,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:14:17,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:14:17,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:14:17,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:14:17,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:14:17,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:14:17,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:14:17,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:14:17,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:14:17,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:14:17,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:14:17,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:14:17,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:14:17,425 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:14:17,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:14:17,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:14:17,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:14:17,428 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:14:17,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:14:17,428 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:14:17,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:14:17,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:14:17,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:14:17,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:14:17,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:14:17,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:14:17,429 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:14:17,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:14:17,430 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:14:17,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:14:17,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:14:17,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:14:17,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:14:17,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:14:17,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:14:17,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:14:17,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:14:17,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:14:17,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:14:17,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:14:17,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:14:17,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:14:17,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:14:17,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:14:17,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:14:17,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:14:17,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:14:17,786 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:14:17,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-08-18 21:14:17,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7668df8/337b0fff24944cc1840df5f716fe98a6/FLAGb721122b1 [2020-08-18 21:14:18,342 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:14:18,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-08-18 21:14:18,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7668df8/337b0fff24944cc1840df5f716fe98a6/FLAGb721122b1 [2020-08-18 21:14:18,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb7668df8/337b0fff24944cc1840df5f716fe98a6 [2020-08-18 21:14:18,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:14:18,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:14:18,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:14:18,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:14:18,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:14:18,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:14:18" (1/1) ... [2020-08-18 21:14:18,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17518f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:18, skipping insertion in model container [2020-08-18 21:14:18,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:14:18" (1/1) ... [2020-08-18 21:14:18,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:14:18,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:14:18,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:14:18,995 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:14:19,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:14:19,032 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:14:19,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19 WrapperNode [2020-08-18 21:14:19,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:14:19,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:14:19,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:14:19,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:14:19,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (1/1) ... [2020-08-18 21:14:19,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (1/1) ... [2020-08-18 21:14:19,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (1/1) ... [2020-08-18 21:14:19,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (1/1) ... [2020-08-18 21:14:19,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (1/1) ... [2020-08-18 21:14:19,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (1/1) ... [2020-08-18 21:14:19,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (1/1) ... [2020-08-18 21:14:19,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:14:19,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:14:19,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:14:19,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:14:19,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:14:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:14:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:14:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 21:14:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 21:14:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:14:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:14:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:14:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 21:14:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 21:14:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:14:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:14:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:14:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:14:19,486 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:14:19,487 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 21:14:19,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:14:19 BoogieIcfgContainer [2020-08-18 21:14:19,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:14:19,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:14:19,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:14:19,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:14:19,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:14:18" (1/3) ... [2020-08-18 21:14:19,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9ca4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:14:19, skipping insertion in model container [2020-08-18 21:14:19,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:14:19" (2/3) ... [2020-08-18 21:14:19,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9ca4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:14:19, skipping insertion in model container [2020-08-18 21:14:19,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:14:19" (3/3) ... [2020-08-18 21:14:19,504 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-08-18 21:14:19,518 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:14:19,527 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:14:19,546 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:14:19,579 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:14:19,579 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:14:19,579 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:14:19,580 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:14:19,580 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:14:19,580 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:14:19,580 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:14:19,580 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:14:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-08-18 21:14:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:14:19,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:19,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:19,611 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:19,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1128800291, now seen corresponding path program 1 times [2020-08-18 21:14:19,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:19,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724498171] [2020-08-18 21:14:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:19,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:14:19,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724498171] [2020-08-18 21:14:19,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:19,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:14:19,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270429449] [2020-08-18 21:14:19,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:14:19,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:14:19,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:14:19,970 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-08-18 21:14:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:20,150 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions. [2020-08-18 21:14:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:14:20,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 21:14:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:20,165 INFO L225 Difference]: With dead ends: 87 [2020-08-18 21:14:20,165 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 21:14:20,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:14:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 21:14:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 21:14:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 21:14:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-18 21:14:20,232 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2020-08-18 21:14:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:20,233 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-18 21:14:20,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:14:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-18 21:14:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:14:20,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:20,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:20,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:14:20,236 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1106844324, now seen corresponding path program 1 times [2020-08-18 21:14:20,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:20,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147815716] [2020-08-18 21:14:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:14:20,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147815716] [2020-08-18 21:14:20,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:20,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:14:20,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396404520] [2020-08-18 21:14:20,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:14:20,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:14:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:14:20,342 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-08-18 21:14:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:20,454 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-08-18 21:14:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:14:20,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 21:14:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:20,458 INFO L225 Difference]: With dead ends: 54 [2020-08-18 21:14:20,458 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 21:14:20,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:14:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 21:14:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-08-18 21:14:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 21:14:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2020-08-18 21:14:20,475 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2020-08-18 21:14:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:20,475 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2020-08-18 21:14:20,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:14:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2020-08-18 21:14:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:14:20,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:20,477 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:20,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:14:20,477 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:20,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1247762898, now seen corresponding path program 1 times [2020-08-18 21:14:20,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:20,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177348707] [2020-08-18 21:14:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:14:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:14:20,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177348707] [2020-08-18 21:14:20,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:20,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:14:20,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879484063] [2020-08-18 21:14:20,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:14:20,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:14:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:14:20,604 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2020-08-18 21:14:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:20,740 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 21:14:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:14:20,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 21:14:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:20,742 INFO L225 Difference]: With dead ends: 56 [2020-08-18 21:14:20,743 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 21:14:20,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:14:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 21:14:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 21:14:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 21:14:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-08-18 21:14:20,758 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2020-08-18 21:14:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:20,759 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-08-18 21:14:20,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:14:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-08-18 21:14:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:14:20,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:20,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:20,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:14:20,761 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2050697988, now seen corresponding path program 1 times [2020-08-18 21:14:20,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:20,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394994356] [2020-08-18 21:14:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:14:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 21:14:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 21:14:20,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394994356] [2020-08-18 21:14:20,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:20,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:14:20,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12515382] [2020-08-18 21:14:20,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:14:20,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:14:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:14:20,871 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2020-08-18 21:14:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:21,015 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-08-18 21:14:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:14:21,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-18 21:14:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:21,018 INFO L225 Difference]: With dead ends: 60 [2020-08-18 21:14:21,018 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 21:14:21,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:14:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 21:14:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-18 21:14:21,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 21:14:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-08-18 21:14:21,032 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2020-08-18 21:14:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:21,033 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-08-18 21:14:21,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:14:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-08-18 21:14:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:14:21,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:21,035 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:21,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:14:21,035 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash -35497745, now seen corresponding path program 1 times [2020-08-18 21:14:21,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:21,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553503272] [2020-08-18 21:14:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:14:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 21:14:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:14:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 21:14:21,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553503272] [2020-08-18 21:14:21,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:21,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:14:21,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215140711] [2020-08-18 21:14:21,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:14:21,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:14:21,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:14:21,142 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-08-18 21:14:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:21,240 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-08-18 21:14:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:14:21,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-18 21:14:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:21,243 INFO L225 Difference]: With dead ends: 65 [2020-08-18 21:14:21,243 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 21:14:21,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:14:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 21:14:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-08-18 21:14:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 21:14:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-08-18 21:14:21,256 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2020-08-18 21:14:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:21,257 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-08-18 21:14:21,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:14:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-08-18 21:14:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 21:14:21,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:21,259 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:21,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:14:21,260 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash 663071772, now seen corresponding path program 1 times [2020-08-18 21:14:21,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:21,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792302071] [2020-08-18 21:14:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:14:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 21:14:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 21:14:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 21:14:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 21:14:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:14:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-18 21:14:21,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792302071] [2020-08-18 21:14:21,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:21,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:14:21,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098607006] [2020-08-18 21:14:21,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:14:21,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:14:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:14:21,414 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2020-08-18 21:14:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:21,570 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-08-18 21:14:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:14:21,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-08-18 21:14:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:21,573 INFO L225 Difference]: With dead ends: 74 [2020-08-18 21:14:21,573 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 21:14:21,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:14:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 21:14:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-08-18 21:14:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 21:14:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-08-18 21:14:21,603 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2020-08-18 21:14:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:21,604 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-08-18 21:14:21,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:14:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-08-18 21:14:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 21:14:21,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:21,606 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:21,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:14:21,607 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash -801825860, now seen corresponding path program 1 times [2020-08-18 21:14:21,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:21,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728368702] [2020-08-18 21:14:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:14:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 21:14:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 21:14:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 21:14:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 21:14:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:14:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 21:14:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 21:14:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-18 21:14:21,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728368702] [2020-08-18 21:14:21,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:21,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:14:21,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632169579] [2020-08-18 21:14:21,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:14:21,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:14:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:14:21,788 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2020-08-18 21:14:21,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:21,989 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-08-18 21:14:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:14:21,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-08-18 21:14:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:21,991 INFO L225 Difference]: With dead ends: 74 [2020-08-18 21:14:21,991 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 21:14:21,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:14:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 21:14:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 21:14:22,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 21:14:22,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-08-18 21:14:22,017 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2020-08-18 21:14:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:22,022 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-08-18 21:14:22,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:14:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-08-18 21:14:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 21:14:22,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:14:22,029 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:14:22,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:14:22,029 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:14:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:14:22,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1730547273, now seen corresponding path program 1 times [2020-08-18 21:14:22,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:14:22,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527428080] [2020-08-18 21:14:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:14:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:14:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:14:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 21:14:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 21:14:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 21:14:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 21:14:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:14:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 21:14:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 21:14:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 21:14:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 21:14:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:14:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-08-18 21:14:22,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527428080] [2020-08-18 21:14:22,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:14:22,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:14:22,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420367712] [2020-08-18 21:14:22,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:14:22,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:14:22,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:14:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:14:22,211 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2020-08-18 21:14:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:14:22,400 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-08-18 21:14:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:14:22,401 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-08-18 21:14:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:14:22,402 INFO L225 Difference]: With dead ends: 72 [2020-08-18 21:14:22,402 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:14:22,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:14:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:14:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:14:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:14:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:14:22,404 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-08-18 21:14:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:14:22,404 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:14:22,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:14:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:14:22,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:14:22,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:14:22,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:14:22,778 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:14:22,779 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:14:22,779 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:14:22,779 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:14:22,779 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:14:22,779 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:14:22,779 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 21:14:22,780 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 21:14:22,780 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 21:14:22,780 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 21:14:22,782 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,782 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-08-18 21:14:22,782 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed. [2020-08-18 21:14:22,782 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 54) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,782 INFO L268 CegarLoopResult]: For program point L23-3(lines 23 54) no Hoare annotation was computed. [2020-08-18 21:14:22,783 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,783 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,783 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-08-18 21:14:22,783 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-08-18 21:14:22,783 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 53) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,783 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-18 21:14:22,784 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-08-18 21:14:22,784 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,784 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,784 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,785 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,785 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,785 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,785 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed. [2020-08-18 21:14:22,786 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,786 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed. [2020-08-18 21:14:22,787 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-18 21:14:22,787 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-08-18 21:14:22,788 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,788 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-08-18 21:14:22,788 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,788 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,788 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,789 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,790 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-08-18 21:14:22,791 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 21:14:22,791 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 21:14:22,791 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 21:14:22,791 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 21:14:22,791 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 21:14:22,791 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 21:14:22,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:14:22 BoogieIcfgContainer [2020-08-18 21:14:22,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:14:22,829 INFO L168 Benchmark]: Toolchain (without parser) took 4050.82 ms. Allocated memory was 139.5 MB in the beginning and 245.4 MB in the end (delta: 105.9 MB). Free memory was 102.5 MB in the beginning and 117.3 MB in the end (delta: -14.8 MB). Peak memory consumption was 91.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:22,830 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:14:22,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.00 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:22,832 INFO L168 Benchmark]: Boogie Preprocessor took 118.79 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 179.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:22,833 INFO L168 Benchmark]: RCFGBuilder took 340.31 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:22,837 INFO L168 Benchmark]: TraceAbstraction took 3324.14 ms. Allocated memory was 201.9 MB in the beginning and 245.4 MB in the end (delta: 43.5 MB). Free memory was 163.1 MB in the beginning and 117.3 MB in the end (delta: 45.8 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:14:22,851 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.00 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.79 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 179.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 340.31 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3324.14 ms. Allocated memory was 201.9 MB in the beginning and 245.4 MB in the end (delta: 43.5 MB). Free memory was 163.1 MB in the beginning and 117.3 MB in the end (delta: 45.8 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i + 1 <= len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 104 SDslu, 1002 SDs, 0 SdLazy, 517 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 368 HoareAnnotationTreeSize, 55 FomulaSimplifications, 534 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 60 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23622 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...