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/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:09,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:09,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:09,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:09,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:09,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:09,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:09,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:09,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:09,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:09,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:09,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:09,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:09,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:09,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:09,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:09,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:09,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:09,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:09,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:09,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:09,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:09,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:09,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:09,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:09,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:09,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:09,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:09,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:09,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:09,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:09,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:09,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:09,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:09,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:09,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:09,750 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 [2019-10-14 21:45:09,765 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:09,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:09,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:09,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:09,767 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:09,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:09,767 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:09,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:09,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:09,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:09,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:09,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:09,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:09,769 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:09,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:09,769 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:09,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:09,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:09,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:09,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:09,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:09,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:09,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:09,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:09,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:09,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:09,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:09,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:09,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:10,076 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:10,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:10,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:10,098 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:10,099 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:10,100 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-10-14 21:45:10,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/addd02469/eeba6950cc5845a592feef5770a290b1/FLAG737c2cb42 [2019-10-14 21:45:10,679 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:10,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-10-14 21:45:10,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/addd02469/eeba6950cc5845a592feef5770a290b1/FLAG737c2cb42 [2019-10-14 21:45:11,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/addd02469/eeba6950cc5845a592feef5770a290b1 [2019-10-14 21:45:11,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:11,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:11,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:11,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:11,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:11,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164b9106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11, skipping insertion in model container [2019-10-14 21:45:11,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,073 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:11,095 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:11,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:11,297 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:11,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:11,357 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:11,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11 WrapperNode [2019-10-14 21:45:11,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:11,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:11,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:11,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:11,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:11,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:11,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:11,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:11,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (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 [2019-10-14 21:45:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:11,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:11,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:11,902 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:11,902 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-14 21:45:11,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:11 BoogieIcfgContainer [2019-10-14 21:45:11,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:11,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:11,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:11,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:11,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:11" (1/3) ... [2019-10-14 21:45:11,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6413deae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:11, skipping insertion in model container [2019-10-14 21:45:11,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (2/3) ... [2019-10-14 21:45:11,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6413deae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:11, skipping insertion in model container [2019-10-14 21:45:11,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:11" (3/3) ... [2019-10-14 21:45:11,911 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2019-10-14 21:45:11,921 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:11,928 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:11,940 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:11,964 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:11,965 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:11,965 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:11,965 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:11,965 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:11,965 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:11,965 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:11,966 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-10-14 21:45:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:45:11,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,990 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:45:11,992 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash -190793262, now seen corresponding path program 1 times [2019-10-14 21:45:12,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145158288] [2019-10-14 21:45:12,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:12,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145158288] [2019-10-14 21:45:12,180 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:12,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:12,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791060307] [2019-10-14 21:45:12,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:12,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:12,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:12,202 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-10-14 21:45:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,353 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2019-10-14 21:45:12,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:12,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-14 21:45:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,363 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:45:12,363 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:45:12,367 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:45:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 21:45:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:45:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-10-14 21:45:12,406 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 25 [2019-10-14 21:45:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,407 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-10-14 21:45:12,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-10-14 21:45:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:45:12,408 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,408 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:45:12,409 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1826977482, now seen corresponding path program 1 times [2019-10-14 21:45:12,410 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543297252] [2019-10-14 21:45:12,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:12,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543297252] [2019-10-14 21:45:12,492 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:12,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:12,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433891083] [2019-10-14 21:45:12,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:12,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:12,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:12,496 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-10-14 21:45:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,626 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2019-10-14 21:45:12,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:12,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:45:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,628 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:45:12,628 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:45:12,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:45:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 21:45:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:45:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-14 21:45:12,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2019-10-14 21:45:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,640 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-14 21:45:12,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-14 21:45:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:45:12,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,642 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:45:12,643 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1635964633, now seen corresponding path program 1 times [2019-10-14 21:45:12,645 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658284707] [2019-10-14 21:45:12,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:45:12,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658284707] [2019-10-14 21:45:12,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088671105] [2019-10-14 21:45:12,814 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 [2019-10-14 21:45:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:45:12,914 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:12,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:12,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001260697] [2019-10-14 21:45:12,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:12,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:12,916 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 6 states. [2019-10-14 21:45:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,092 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2019-10-14 21:45:13,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:13,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-14 21:45:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,094 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:45:13,095 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:45:13,095 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:45:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:45:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:45:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-10-14 21:45:13,104 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2019-10-14 21:45:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,105 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-10-14 21:45:13,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-10-14 21:45:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:45:13,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,107 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:45:13,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,311 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1768739882, now seen corresponding path program 2 times [2019-10-14 21:45:13,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523059571] [2019-10-14 21:45:13,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:45:13,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523059571] [2019-10-14 21:45:13,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331995336] [2019-10-14 21:45:13,417 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 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 [2019-10-14 21:45:13,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:13,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:13,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:13,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:45:13,505 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:13,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979245640] [2019-10-14 21:45:13,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:13,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:13,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:13,507 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2019-10-14 21:45:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,670 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-10-14 21:45:13,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:13,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2019-10-14 21:45:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,672 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:45:13,672 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:45:13,673 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:45:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 21:45:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:45:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-10-14 21:45:13,682 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 39 [2019-10-14 21:45:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,683 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-10-14 21:45:13,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:13,683 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-10-14 21:45:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:45:13,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,685 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-10-14 21:45:13,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,899 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1394041657, now seen corresponding path program 3 times [2019-10-14 21:45:13,900 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283616606] [2019-10-14 21:45:13,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:45:14,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283616606] [2019-10-14 21:45:14,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243995934] [2019-10-14 21:45:14,032 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 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 [2019-10-14 21:45:14,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:14,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:14,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:14,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:45:14,148 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:14,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:14,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605743250] [2019-10-14 21:45:14,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:14,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:14,152 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2019-10-14 21:45:14,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:14,326 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2019-10-14 21:45:14,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:14,326 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2019-10-14 21:45:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:14,327 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:45:14,328 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:45:14,329 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:45:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-14 21:45:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:45:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-10-14 21:45:14,348 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 46 [2019-10-14 21:45:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:14,349 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-10-14 21:45:14,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:14,349 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-10-14 21:45:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:45:14,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:14,354 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2019-10-14 21:45:14,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:14,568 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:14,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1002468982, now seen corresponding path program 4 times [2019-10-14 21:45:14,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:14,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497834618] [2019-10-14 21:45:14,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:45:14,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497834618] [2019-10-14 21:45:14,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602172370] [2019-10-14 21:45:14,707 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 21:45:14,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:14,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:14,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:14,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:45:14,811 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:14,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:14,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496078604] [2019-10-14 21:45:14,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:14,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:14,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:14,814 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 9 states. [2019-10-14 21:45:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:14,956 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-10-14 21:45:14,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:14,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2019-10-14 21:45:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:14,958 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:45:14,958 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:45:14,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:45:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-14 21:45:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:45:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2019-10-14 21:45:14,968 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 53 [2019-10-14 21:45:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:14,968 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2019-10-14 21:45:14,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2019-10-14 21:45:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:45:14,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:14,972 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2019-10-14 21:45:15,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:15,173 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:15,174 INFO L82 PathProgramCache]: Analyzing trace with hash 451754087, now seen corresponding path program 5 times [2019-10-14 21:45:15,174 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:15,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076498996] [2019-10-14 21:45:15,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:15,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:15,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-14 21:45:15,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076498996] [2019-10-14 21:45:15,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515616503] [2019-10-14 21:45:15,347 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 21:45:19,267 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:45:19,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:19,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:19,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-14 21:45:19,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:19,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:45:19,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903284293] [2019-10-14 21:45:19,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:45:19,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:19,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:45:19,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:19,297 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 10 states. [2019-10-14 21:45:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:19,487 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2019-10-14 21:45:19,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:19,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2019-10-14 21:45:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:19,489 INFO L225 Difference]: With dead ends: 125 [2019-10-14 21:45:19,489 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:45:19,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:45:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-14 21:45:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:45:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2019-10-14 21:45:19,499 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 60 [2019-10-14 21:45:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:19,499 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2019-10-14 21:45:19,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:45:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2019-10-14 21:45:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:45:19,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:19,501 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:19,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:19,710 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:19,711 INFO L82 PathProgramCache]: Analyzing trace with hash 757831402, now seen corresponding path program 6 times [2019-10-14 21:45:19,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:19,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792428159] [2019-10-14 21:45:19,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:19,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:19,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-14 21:45:19,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792428159] [2019-10-14 21:45:19,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359947075] [2019-10-14 21:45:19,901 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:20,977 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:45:20,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:20,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:20,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-14 21:45:21,009 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:21,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:45:21,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871833194] [2019-10-14 21:45:21,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:45:21,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:21,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:45:21,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:21,019 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 11 states. [2019-10-14 21:45:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:21,249 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2019-10-14 21:45:21,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:45:21,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2019-10-14 21:45:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:21,250 INFO L225 Difference]: With dead ends: 138 [2019-10-14 21:45:21,250 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:45:21,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:45:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-14 21:45:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:45:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2019-10-14 21:45:21,263 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 67 [2019-10-14 21:45:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:21,263 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2019-10-14 21:45:21,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:45:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2019-10-14 21:45:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:45:21,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:21,265 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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] [2019-10-14 21:45:21,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:21,472 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1686307833, now seen corresponding path program 7 times [2019-10-14 21:45:21,473 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:21,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182048428] [2019-10-14 21:45:21,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:21,474 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:21,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-14 21:45:21,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182048428] [2019-10-14 21:45:21,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895090849] [2019-10-14 21:45:21,629 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:21,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:21,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-14 21:45:21,726 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:21,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:21,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319980045] [2019-10-14 21:45:21,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:21,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:21,728 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 12 states. [2019-10-14 21:45:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:21,964 INFO L93 Difference]: Finished difference Result 151 states and 171 transitions. [2019-10-14 21:45:21,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:21,964 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-14 21:45:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:21,966 INFO L225 Difference]: With dead ends: 151 [2019-10-14 21:45:21,966 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 21:45:21,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 21:45:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-10-14 21:45:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:45:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-10-14 21:45:21,977 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 74 [2019-10-14 21:45:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:21,977 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-10-14 21:45:21,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-10-14 21:45:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:45:21,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:21,979 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:22,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:22,189 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash 494861386, now seen corresponding path program 8 times [2019-10-14 21:45:22,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:22,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34580809] [2019-10-14 21:45:22,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-14 21:45:22,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34580809] [2019-10-14 21:45:22,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628666793] [2019-10-14 21:45:22,401 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:22,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:22,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:22,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:22,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-14 21:45:22,578 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:22,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:22,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803119028] [2019-10-14 21:45:22,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:22,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:22,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:22,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:22,580 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 13 states. [2019-10-14 21:45:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:22,818 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2019-10-14 21:45:22,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:22,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2019-10-14 21:45:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:22,820 INFO L225 Difference]: With dead ends: 164 [2019-10-14 21:45:22,820 INFO L226 Difference]: Without dead ends: 93 [2019-10-14 21:45:22,821 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-14 21:45:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-10-14 21:45:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 21:45:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2019-10-14 21:45:22,832 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 81 [2019-10-14 21:45:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:22,832 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2019-10-14 21:45:22,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2019-10-14 21:45:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 21:45:22,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:22,837 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 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] [2019-10-14 21:45:23,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:23,049 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,050 INFO L82 PathProgramCache]: Analyzing trace with hash -938874969, now seen corresponding path program 9 times [2019-10-14 21:45:23,050 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,051 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516640959] [2019-10-14 21:45:23,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-10-14 21:45:23,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516640959] [2019-10-14 21:45:23,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513589771] [2019-10-14 21:45:23,213 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:40,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:40,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:40,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:45:40,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-10-14 21:45:40,979 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:40,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:45:40,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513615095] [2019-10-14 21:45:40,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:45:40,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:40,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:45:40,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:40,981 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 14 states. [2019-10-14 21:45:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:41,237 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2019-10-14 21:45:41,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:45:41,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2019-10-14 21:45:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:41,239 INFO L225 Difference]: With dead ends: 177 [2019-10-14 21:45:41,239 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 21:45:41,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 21:45:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-10-14 21:45:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 21:45:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2019-10-14 21:45:41,265 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 88 [2019-10-14 21:45:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:41,265 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2019-10-14 21:45:41,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:45:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2019-10-14 21:45:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:45:41,284 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:41,284 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:41,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:41,493 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1207453270, now seen corresponding path program 10 times [2019-10-14 21:45:41,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:41,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454874493] [2019-10-14 21:45:41,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:41,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:41,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-14 21:45:41,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454874493] [2019-10-14 21:45:41,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867324403] [2019-10-14 21:45:41,666 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:41,740 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:41,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:41,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:45:41,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-14 21:45:41,762 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:41,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:45:41,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067380706] [2019-10-14 21:45:41,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:41,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:41,764 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 15 states. [2019-10-14 21:45:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:41,956 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2019-10-14 21:45:41,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:41,956 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2019-10-14 21:45:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:41,957 INFO L225 Difference]: With dead ends: 190 [2019-10-14 21:45:41,957 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:45:41,958 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:45:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-10-14 21:45:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:45:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2019-10-14 21:45:41,965 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 95 [2019-10-14 21:45:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:41,965 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2019-10-14 21:45:41,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2019-10-14 21:45:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:45:41,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:41,966 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 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] [2019-10-14 21:45:42,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:42,176 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:42,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1082522439, now seen corresponding path program 11 times [2019-10-14 21:45:42,177 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:42,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225265345] [2019-10-14 21:45:42,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:42,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:42,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-10-14 21:45:42,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225265345] [2019-10-14 21:45:42,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496848270] [2019-10-14 21:45:42,344 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true