/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:16:40,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:16:40,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:16:40,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:16:40,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:16:40,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:16:40,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:16:40,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:16:40,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:16:40,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:16:40,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:16:40,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:16:40,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:16:40,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:16:40,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:16:40,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:16:40,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:16:40,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:16:40,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:16:40,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:16:40,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:16:40,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:16:40,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:16:40,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:16:40,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:16:40,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:16:40,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:16:40,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:16:40,615 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 [2020-07-17 12:16:40,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:16:40,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:16:40,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:16:40,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:16:40,646 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:16:40,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:16:40,646 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:16:40,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:16:40,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:16:40,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:16:40,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:16:40,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:16:40,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:16:40,648 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:16:40,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:16:40,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:16:40,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:16:40,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:16:40,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:16:40,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:16:40,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:16:40,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:16:40,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:16:40,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:16:40,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:16:40,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:16:40,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:16:40,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:16:40,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:16:40,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:16:40,965 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:16:40,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:16:40,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:16:40,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:16:40,989 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:16:40,990 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-17 12:16:41,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/735446044/65dcecb2360a4d53bf2c4b3658d0e8f7/FLAG22e83f1bb [2020-07-17 12:16:41,473 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:16:41,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-17 12:16:41,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/735446044/65dcecb2360a4d53bf2c4b3658d0e8f7/FLAG22e83f1bb [2020-07-17 12:16:41,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/735446044/65dcecb2360a4d53bf2c4b3658d0e8f7 [2020-07-17 12:16:41,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:16:41,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:16:41,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:41,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:16:41,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:16:41,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1047d669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:41, skipping insertion in model container [2020-07-17 12:16:41,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:41" (1/1) ... [2020-07-17 12:16:41,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:16:41,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:16:42,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:42,074 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:16:42,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:42,108 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:16:42,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42 WrapperNode [2020-07-17 12:16:42,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:42,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:16:42,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:16:42,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:16:42,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (1/1) ... [2020-07-17 12:16:42,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (1/1) ... [2020-07-17 12:16:42,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (1/1) ... [2020-07-17 12:16:42,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (1/1) ... [2020-07-17 12:16:42,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (1/1) ... [2020-07-17 12:16:42,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (1/1) ... [2020-07-17 12:16:42,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (1/1) ... [2020-07-17 12:16:42,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:16:42,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:16:42,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:16:42,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:16:42,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (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 [2020-07-17 12:16:42,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:16:42,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:16:42,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:16:42,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:16:42,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:16:42,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:16:42,286 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:16:42,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:16:42,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:16:42,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:16:42,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:16:42,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:16:42,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:16:42,568 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:16:42,568 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:16:42,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:42 BoogieIcfgContainer [2020-07-17 12:16:42,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:16:42,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:16:42,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:16:42,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:16:42,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:16:41" (1/3) ... [2020-07-17 12:16:42,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8c7d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:42, skipping insertion in model container [2020-07-17 12:16:42,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:42" (2/3) ... [2020-07-17 12:16:42,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8c7d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:42, skipping insertion in model container [2020-07-17 12:16:42,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:42" (3/3) ... [2020-07-17 12:16:42,589 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-07-17 12:16:42,598 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:16:42,604 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:16:42,617 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:16:42,640 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:16:42,641 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:16:42,641 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:16:42,641 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:16:42,641 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:16:42,641 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:16:42,641 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:16:42,641 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:16:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-17 12:16:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-17 12:16:42,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:42,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:42,668 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-07-17 12:16:42,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:42,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643655434] [2020-07-17 12:16:42,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:42,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643655434] [2020-07-17 12:16:42,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:42,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 12:16:42,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424895393] [2020-07-17 12:16:42,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 12:16:42,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:42,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 12:16:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:16:42,822 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-17 12:16:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:42,850 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-07-17 12:16:42,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 12:16:42,852 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-17 12:16:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:42,862 INFO L225 Difference]: With dead ends: 61 [2020-07-17 12:16:42,862 INFO L226 Difference]: Without dead ends: 29 [2020-07-17 12:16:42,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:16:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-17 12:16:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-17 12:16:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-17 12:16:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-07-17 12:16:42,911 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-07-17 12:16:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:42,912 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-07-17 12:16:42,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 12:16:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-07-17 12:16:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-17 12:16:42,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:42,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:42,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:16:42,914 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-07-17 12:16:42,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:42,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124639859] [2020-07-17 12:16:42,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:43,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124639859] [2020-07-17 12:16:43,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:43,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:16:43,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084545026] [2020-07-17 12:16:43,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:16:43,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:43,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:16:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:16:43,063 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-07-17 12:16:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:43,182 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-17 12:16:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:16:43,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-17 12:16:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:43,185 INFO L225 Difference]: With dead ends: 35 [2020-07-17 12:16:43,185 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 12:16:43,186 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 [2020-07-17 12:16:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 12:16:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-17 12:16:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:16:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-07-17 12:16:43,199 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-07-17 12:16:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:43,199 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-07-17 12:16:43,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:16:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-07-17 12:16:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 12:16:43,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:43,201 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:43,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:16:43,202 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:43,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-07-17 12:16:43,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:43,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207757345] [2020-07-17 12:16:43,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:43,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207757345] [2020-07-17 12:16:43,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:43,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:16:43,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555118929] [2020-07-17 12:16:43,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:16:43,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:16:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:16:43,305 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-07-17 12:16:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:43,450 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-07-17 12:16:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:16:43,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-17 12:16:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:43,453 INFO L225 Difference]: With dead ends: 48 [2020-07-17 12:16:43,453 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 12:16:43,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:16:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 12:16:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-17 12:16:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-17 12:16:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-07-17 12:16:43,466 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-07-17 12:16:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:43,467 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-07-17 12:16:43,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:16:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-07-17 12:16:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:16:43,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:43,469 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:43,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:16:43,469 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-07-17 12:16:43,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:43,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421005109] [2020-07-17 12:16:43,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 12:16:43,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421005109] [2020-07-17 12:16:43,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:43,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:16:43,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675104762] [2020-07-17 12:16:43,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:16:43,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:43,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:16:43,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:16:43,597 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-07-17 12:16:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:43,695 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-07-17 12:16:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:16:43,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-17 12:16:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:43,698 INFO L225 Difference]: With dead ends: 55 [2020-07-17 12:16:43,707 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 12:16:43,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 12:16:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-17 12:16:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 12:16:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-07-17 12:16:43,722 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-07-17 12:16:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:43,723 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-07-17 12:16:43,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:16:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-07-17 12:16:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:16:43,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:43,725 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, 1, 1, 1] [2020-07-17 12:16:43,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:16:43,725 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:43,726 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-07-17 12:16:43,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:43,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129834986] [2020-07-17 12:16:43,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:43,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129834986] [2020-07-17 12:16:43,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:43,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 12:16:43,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73698645] [2020-07-17 12:16:43,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:16:43,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:43,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:16:43,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:43,865 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-07-17 12:16:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:44,075 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-17 12:16:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:16:44,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-17 12:16:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:44,077 INFO L225 Difference]: With dead ends: 70 [2020-07-17 12:16:44,077 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 12:16:44,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:16:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 12:16:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-17 12:16:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-17 12:16:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-17 12:16:44,091 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-07-17 12:16:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:44,091 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-17 12:16:44,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:16:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-17 12:16:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 12:16:44,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:44,093 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, 1, 1, 1, 1, 1] [2020-07-17 12:16:44,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:16:44,094 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:44,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:44,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-07-17 12:16:44,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:44,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582749248] [2020-07-17 12:16:44,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:44,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582749248] [2020-07-17 12:16:44,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:44,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 12:16:44,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795301961] [2020-07-17 12:16:44,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:16:44,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:16:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:16:44,178 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-07-17 12:16:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:44,354 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-07-17 12:16:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 12:16:44,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-17 12:16:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:44,356 INFO L225 Difference]: With dead ends: 72 [2020-07-17 12:16:44,356 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 12:16:44,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:16:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 12:16:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-07-17 12:16:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-17 12:16:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-07-17 12:16:44,369 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-07-17 12:16:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:44,369 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-07-17 12:16:44,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:16:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-07-17 12:16:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-17 12:16:44,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:44,372 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 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] [2020-07-17 12:16:44,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:16:44,372 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:44,373 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-07-17 12:16:44,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:44,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223714717] [2020-07-17 12:16:44,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:44,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223714717] [2020-07-17 12:16:44,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289788893] [2020-07-17 12:16:44,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:44,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 12:16:44,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:44,746 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:16:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:44,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:44,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-17 12:16:44,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74991318] [2020-07-17 12:16:44,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 12:16:44,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:44,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 12:16:44,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-17 12:16:44,802 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 15 states. [2020-07-17 12:16:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:45,347 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-07-17 12:16:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 12:16:45,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-07-17 12:16:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:45,351 INFO L225 Difference]: With dead ends: 110 [2020-07-17 12:16:45,351 INFO L226 Difference]: Without dead ends: 95 [2020-07-17 12:16:45,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-07-17 12:16:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-17 12:16:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-17 12:16:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-17 12:16:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-07-17 12:16:45,382 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 56 [2020-07-17 12:16:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:45,384 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-07-17 12:16:45,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 12:16:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-07-17 12:16:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-17 12:16:45,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:45,389 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:45,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-17 12:16:45,605 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:45,605 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-07-17 12:16:45,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:45,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807731034] [2020-07-17 12:16:45,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:45,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807731034] [2020-07-17 12:16:45,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481011237] [2020-07-17 12:16:45,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:45,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:16:45,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:45,812 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:45,813 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 12:16:45,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:45,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-17 12:16:45,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34862677] [2020-07-17 12:16:45,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 12:16:45,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 12:16:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:16:45,839 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 14 states. [2020-07-17 12:16:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:46,023 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-07-17 12:16:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:16:46,024 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-07-17 12:16:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:46,028 INFO L225 Difference]: With dead ends: 93 [2020-07-17 12:16:46,028 INFO L226 Difference]: Without dead ends: 91 [2020-07-17 12:16:46,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-07-17 12:16:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-17 12:16:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-07-17 12:16:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-17 12:16:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-07-17 12:16:46,042 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 58 [2020-07-17 12:16:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:46,043 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-07-17 12:16:46,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 12:16:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-07-17 12:16:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-17 12:16:46,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:46,045 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:46,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:46,261 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:46,262 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-07-17 12:16:46,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:46,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529464975] [2020-07-17 12:16:46,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 12:16:46,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529464975] [2020-07-17 12:16:46,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653150385] [2020-07-17 12:16:46,444 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:46,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:46,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:46,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 12:16:46,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:46,594 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:46,596 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 12:16:46,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:46,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-17 12:16:46,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520065225] [2020-07-17 12:16:46,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 12:16:46,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:46,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 12:16:46,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-07-17 12:16:46,631 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 18 states. [2020-07-17 12:16:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:47,060 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-07-17 12:16:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:16:47,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-07-17 12:16:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:47,062 INFO L225 Difference]: With dead ends: 112 [2020-07-17 12:16:47,063 INFO L226 Difference]: Without dead ends: 110 [2020-07-17 12:16:47,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-07-17 12:16:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-17 12:16:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-07-17 12:16:47,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-17 12:16:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-07-17 12:16:47,077 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 83 [2020-07-17 12:16:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:47,077 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-07-17 12:16:47,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 12:16:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-07-17 12:16:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-17 12:16:47,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:47,080 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:47,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:47,294 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:47,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:47,295 INFO L82 PathProgramCache]: Analyzing trace with hash 314554042, now seen corresponding path program 2 times [2020-07-17 12:16:47,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:47,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709314690] [2020-07-17 12:16:47,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-07-17 12:16:47,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709314690] [2020-07-17 12:16:47,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223635009] [2020-07-17 12:16:47,576 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:47,638 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:47,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:47,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 12:16:47,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:47,737 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-07-17 12:16:47,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:47,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-17 12:16:47,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861946064] [2020-07-17 12:16:47,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 12:16:47,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 12:16:47,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:16:47,779 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 17 states. [2020-07-17 12:16:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:48,036 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2020-07-17 12:16:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:16:48,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 106 [2020-07-17 12:16:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:48,038 INFO L225 Difference]: With dead ends: 105 [2020-07-17 12:16:48,038 INFO L226 Difference]: Without dead ends: 96 [2020-07-17 12:16:48,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-07-17 12:16:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-17 12:16:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-07-17 12:16:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-17 12:16:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-07-17 12:16:48,054 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 106 [2020-07-17 12:16:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:48,056 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-07-17 12:16:48,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 12:16:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-07-17 12:16:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-17 12:16:48,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:48,064 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:48,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:48,279 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-07-17 12:16:48,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:48,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373836433] [2020-07-17 12:16:48,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-07-17 12:16:48,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373836433] [2020-07-17 12:16:48,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303074972] [2020-07-17 12:16:48,517 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:48,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-07-17 12:16:48,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:48,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-17 12:16:48,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:48,833 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:48,835 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:16:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 68 proven. 58 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-07-17 12:16:48,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:48,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2020-07-17 12:16:48,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709389170] [2020-07-17 12:16:48,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 12:16:48,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:48,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 12:16:48,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-07-17 12:16:48,896 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 26 states. [2020-07-17 12:16:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:50,286 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2020-07-17 12:16:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 12:16:50,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 108 [2020-07-17 12:16:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:50,288 INFO L225 Difference]: With dead ends: 111 [2020-07-17 12:16:50,288 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:16:50,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 12:16:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:16:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:16:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:16:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:16:50,293 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-07-17 12:16:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:50,294 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:16:50,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 12:16:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:16:50,294 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:16:50,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-17 12:16:50,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:16:51,058 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:16:51,058 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:51,058 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:51,058 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:16:51,058 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:16:51,059 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:16:51,059 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:51,059 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-17 12:16:51,059 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:51,059 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:51,059 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-17 12:16:51,059 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-07-17 12:16:51,059 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-07-17 12:16:51,061 INFO L264 CegarLoopResult]: At program point L36(lines 26 37) the Hoare annotation is: (let ((.cse0 (= main_~bufferlen~0 (+ main_~buflim~0 2))) (.cse1 (<= (+ main_~bufferlen~0 1) main_~inlen~0))) (or (and (<= main_~in~0 0) (= 0 main_~buf~0) (<= 0 main_~in~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) .cse0 .cse1) (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= main_~buf~0 main_~buflim~0) (<= 1 main_~in~0) .cse0 .cse1 (<= 0 main_~buf~0)))) [2020-07-17 12:16:51,061 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-07-17 12:16:51,061 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-17 12:16:51,061 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-07-17 12:16:51,061 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 2 main_~bufferlen~0) (<= 0 main_~in~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 0 main_~buf~0)) [2020-07-17 12:16:51,061 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 2 main_~bufferlen~0) (<= 0 main_~in~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 0 main_~buf~0)) [2020-07-17 12:16:51,061 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-07-17 12:16:51,062 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-07-17 12:16:51,062 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-07-17 12:16:51,062 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-17 12:16:51,062 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0) (<= 0 main_~buf~0)) [2020-07-17 12:16:51,063 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~buf~0 1) main_~buflim~0)) (.cse1 (= main_~bufferlen~0 (+ main_~buflim~0 2))) (.cse2 (<= (+ main_~bufferlen~0 1) main_~inlen~0))) (or (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) .cse0 (<= 1 main_~in~0) .cse1 .cse2 (<= 0 main_~buf~0)) (and (<= main_~in~0 0) (= 0 main_~buf~0) (<= 0 main_~in~0) .cse0 .cse1 .cse2))) [2020-07-17 12:16:51,063 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-07-17 12:16:51,063 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~buf~0 1) main_~buflim~0)) (.cse1 (= main_~bufferlen~0 (+ main_~buflim~0 2))) (.cse2 (<= (+ main_~bufferlen~0 1) main_~inlen~0))) (or (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) .cse0 (<= 1 main_~in~0) .cse1 .cse2 (<= 0 main_~buf~0)) (and (<= main_~in~0 0) (= 0 main_~buf~0) (<= 0 main_~in~0) .cse0 .cse1 .cse2))) [2020-07-17 12:16:51,063 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-07-17 12:16:51,063 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 37) the Hoare annotation is: (and (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0) (<= 0 main_~buf~0)) [2020-07-17 12:16:51,063 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-17 12:16:51,064 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-17 12:16:51,064 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= main_~buf~0 main_~buflim~0) (<= 1 main_~in~0) (= main_~bufferlen~0 (+ main_~buflim~0 2)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~buf~0)) [2020-07-17 12:16:51,064 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= main_~buf~0 main_~buflim~0) (<= 1 main_~in~0) (= main_~bufferlen~0 (+ main_~buflim~0 2)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~buf~0)) [2020-07-17 12:16:51,064 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-17 12:16:51,064 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-17 12:16:51,064 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-17 12:16:51,064 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-17 12:16:51,065 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-17 12:16:51,065 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-17 12:16:51,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:16:51 BoogieIcfgContainer [2020-07-17 12:16:51,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:16:51,094 INFO L168 Benchmark]: Toolchain (without parser) took 9226.99 ms. Allocated memory was 145.8 MB in the beginning and 299.4 MB in the end (delta: 153.6 MB). Free memory was 102.5 MB in the beginning and 164.6 MB in the end (delta: -62.1 MB). Peak memory consumption was 91.5 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:51,095 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 12:16:51,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.89 ms. Allocated memory is still 145.8 MB. Free memory was 102.1 MB in the beginning and 92.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:51,097 INFO L168 Benchmark]: Boogie Preprocessor took 109.31 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 182.2 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:51,099 INFO L168 Benchmark]: RCFGBuilder took 355.63 ms. Allocated memory is still 202.9 MB. Free memory was 182.2 MB in the beginning and 167.3 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:51,108 INFO L168 Benchmark]: TraceAbstraction took 8508.12 ms. Allocated memory was 202.9 MB in the beginning and 299.4 MB in the end (delta: 96.5 MB). Free memory was 166.6 MB in the beginning and 164.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 98.5 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:51,115 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.89 ms. Allocated memory is still 145.8 MB. Free memory was 102.1 MB in the beginning and 92.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.31 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 182.2 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 355.63 ms. Allocated memory is still 202.9 MB. Free memory was 182.2 MB in the beginning and 167.3 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8508.12 ms. Allocated memory was 202.9 MB in the beginning and 299.4 MB in the end (delta: 96.5 MB). Free memory was 166.6 MB in the beginning and 164.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 98.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((in <= 0 && 0 == buf) && 0 <= in) && buf + 2 <= bufferlen) && bufferlen == buflim + 2) && bufferlen + 1 <= inlen) || (((((in + buflim + 3 <= buf + inlen && buf <= buflim) && 1 <= in) && bufferlen == buflim + 2) && bufferlen + 1 <= inlen) && 0 <= buf) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.8s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 448 SDtfs, 473 SDslu, 1904 SDs, 0 SdLazy, 1480 SolverSat, 551 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 706 GetRequests, 536 SyntacticMatches, 8 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=9, 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, 11 MinimizatonAttempts, 33 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 64 PreInvPairs, 113 NumberOfFragments, 282 HoareAnnotationTreeSize, 64 FomulaSimplifications, 1686 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 942 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 963 NumberOfCodeBlocks, 958 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 947 ConstructedInterpolants, 0 QuantifiedInterpolants, 248326 SizeOfPredicates, 20 NumberOfNonLiveVariables, 782 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 2738/2972 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...