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/data_structures_set_multi_proc_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:43:01,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:43:01,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:43:01,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:43:01,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:43:01,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:43:01,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:43:01,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:43:01,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:43:01,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:43:01,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:43:01,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:43:01,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:43:01,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:43:01,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:43:01,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:43:01,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:43:01,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:43:01,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:43:01,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:43:01,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:43:01,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:43:01,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:43:01,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:43:01,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:43:01,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:43:01,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:43:01,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:43:01,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:43:01,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:43:01,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:43:01,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:43:01,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:43:01,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:43:01,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:43:01,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:43:01,655 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 [2019-10-13 17:43:01,686 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:43:01,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:43:01,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:43:01,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:43:01,691 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:43:01,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:43:01,693 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:43:01,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:43:01,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:43:01,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:43:01,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:43:01,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:43:01,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:43:01,695 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:43:01,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:43:01,695 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:43:01,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:43:01,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:43:01,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:43:01,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:43:01,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:43:01,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:43:01,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:43:01,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:43:01,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:43:01,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:43:01,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:43:01,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:43:01,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:43:01,962 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:43:01,981 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:43:01,985 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:43:01,987 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:43:01,987 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:43:01,988 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2019-10-13 17:43:02,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aace736e/dd6e6b7312d4427bac5fe0ace4ce40ac/FLAG060f05ded [2019-10-13 17:43:02,493 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:43:02,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2019-10-13 17:43:02,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aace736e/dd6e6b7312d4427bac5fe0ace4ce40ac/FLAG060f05ded [2019-10-13 17:43:02,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aace736e/dd6e6b7312d4427bac5fe0ace4ce40ac [2019-10-13 17:43:02,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:43:02,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:43:02,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:02,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:43:02,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:43:02,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:02" (1/1) ... [2019-10-13 17:43:02,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:02, skipping insertion in model container [2019-10-13 17:43:02,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:02" (1/1) ... [2019-10-13 17:43:02,938 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:43:02,959 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:43:03,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:03,142 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:43:03,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:03,261 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:43:03,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03 WrapperNode [2019-10-13 17:43:03,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:03,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:43:03,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:43:03,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:43:03,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (1/1) ... [2019-10-13 17:43:03,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (1/1) ... [2019-10-13 17:43:03,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (1/1) ... [2019-10-13 17:43:03,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (1/1) ... [2019-10-13 17:43:03,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (1/1) ... [2019-10-13 17:43:03,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (1/1) ... [2019-10-13 17:43:03,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (1/1) ... [2019-10-13 17:43:03,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:43:03,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:43:03,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:43:03,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:43:03,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (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 [2019-10-13 17:43:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:43:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:43:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:43:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2019-10-13 17:43:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2019-10-13 17:43:03,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:43:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:43:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:43:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:43:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2019-10-13 17:43:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:43:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2019-10-13 17:43:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:43:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:43:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:43:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:43:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:43:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:43:03,733 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:43:03,733 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-13 17:43:03,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:03 BoogieIcfgContainer [2019-10-13 17:43:03,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:43:03,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:43:03,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:43:03,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:43:03,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:43:02" (1/3) ... [2019-10-13 17:43:03,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a17bcb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:03, skipping insertion in model container [2019-10-13 17:43:03,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:03" (2/3) ... [2019-10-13 17:43:03,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a17bcb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:03, skipping insertion in model container [2019-10-13 17:43:03,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:03" (3/3) ... [2019-10-13 17:43:03,742 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2019-10-13 17:43:03,752 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:43:03,759 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:43:03,770 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:43:03,793 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:43:03,794 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:43:03,794 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:43:03,794 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:43:03,794 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:43:03,794 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:43:03,795 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:43:03,795 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:43:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2019-10-13 17:43:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:43:03,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:03,817 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:03,819 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1780536170, now seen corresponding path program 1 times [2019-10-13 17:43:03,829 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:03,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801780591] [2019-10-13 17:43:03,830 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:03,830 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:03,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:04,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801780591] [2019-10-13 17:43:04,048 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:04,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:04,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562366017] [2019-10-13 17:43:04,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:04,057 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:04,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:04,078 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2019-10-13 17:43:04,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:04,364 INFO L93 Difference]: Finished difference Result 129 states and 190 transitions. [2019-10-13 17:43:04,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:04,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 17:43:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:04,376 INFO L225 Difference]: With dead ends: 129 [2019-10-13 17:43:04,377 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 17:43:04,380 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 [2019-10-13 17:43:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 17:43:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2019-10-13 17:43:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 17:43:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-10-13 17:43:04,434 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 14 [2019-10-13 17:43:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:04,434 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-10-13 17:43:04,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-10-13 17:43:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:04,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:04,437 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:04,437 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2111973388, now seen corresponding path program 1 times [2019-10-13 17:43:04,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:04,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565174300] [2019-10-13 17:43:04,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:04,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:04,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:04,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565174300] [2019-10-13 17:43:04,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472139385] [2019-10-13 17:43:04,513 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 [2019-10-13 17:43:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:04,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:04,629 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:04,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:43:04,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344893945] [2019-10-13 17:43:04,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:43:04,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:43:04,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:04,635 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2019-10-13 17:43:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:04,882 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2019-10-13 17:43:04,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:43:04,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-13 17:43:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:04,885 INFO L225 Difference]: With dead ends: 142 [2019-10-13 17:43:04,885 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 17:43:04,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 17:43:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 52. [2019-10-13 17:43:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:43:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-10-13 17:43:04,901 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 16 [2019-10-13 17:43:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:04,903 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-10-13 17:43:04,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:43:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-10-13 17:43:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:43:04,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:04,905 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:05,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:05,117 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1499407314, now seen corresponding path program 2 times [2019-10-13 17:43:05,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:05,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831138255] [2019-10-13 17:43:05,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:05,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831138255] [2019-10-13 17:43:05,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359546284] [2019-10-13 17:43:05,203 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 [2019-10-13 17:43:05,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:43:05,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:05,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:05,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:43:05,299 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:43:05,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-10-13 17:43:05,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086420731] [2019-10-13 17:43:05,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:05,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:05,301 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 4 states. [2019-10-13 17:43:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:05,336 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2019-10-13 17:43:05,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:43:05,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:43:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:05,338 INFO L225 Difference]: With dead ends: 96 [2019-10-13 17:43:05,338 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:43:05,339 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:43:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-10-13 17:43:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:43:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-13 17:43:05,347 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 18 [2019-10-13 17:43:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:05,348 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-13 17:43:05,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-13 17:43:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:43:05,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:05,350 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:05,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:05,553 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash 723083025, now seen corresponding path program 1 times [2019-10-13 17:43:05,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:05,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036140628] [2019-10-13 17:43:05,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:43:05,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036140628] [2019-10-13 17:43:05,695 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:05,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:43:05,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301995304] [2019-10-13 17:43:05,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:43:05,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:05,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:43:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:43:05,702 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 5 states. [2019-10-13 17:43:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:05,872 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2019-10-13 17:43:05,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:43:05,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-13 17:43:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:05,874 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:43:05,874 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:43:05,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:43:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2019-10-13 17:43:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:43:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-10-13 17:43:05,884 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 39 [2019-10-13 17:43:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:05,884 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-10-13 17:43:05,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:43:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-10-13 17:43:05,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 17:43:05,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:05,886 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:05,886 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash -648100369, now seen corresponding path program 1 times [2019-10-13 17:43:05,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:05,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838825257] [2019-10-13 17:43:05,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:06,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838825257] [2019-10-13 17:43:06,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318779120] [2019-10-13 17:43:06,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -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 [2019-10-13 17:43:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:06,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:06,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:06,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2019-10-13 17:43:06,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511713271] [2019-10-13 17:43:06,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:43:06,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:43:06,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:06,118 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 8 states. [2019-10-13 17:43:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:06,320 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2019-10-13 17:43:06,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:43:06,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-13 17:43:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:06,322 INFO L225 Difference]: With dead ends: 116 [2019-10-13 17:43:06,322 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:43:06,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:43:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:43:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2019-10-13 17:43:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:43:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2019-10-13 17:43:06,330 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 41 [2019-10-13 17:43:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:06,331 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2019-10-13 17:43:06,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:43:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2019-10-13 17:43:06,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 17:43:06,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:06,333 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:06,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:06,537 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1873779725, now seen corresponding path program 2 times [2019-10-13 17:43:06,539 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:06,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848443546] [2019-10-13 17:43:06,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:06,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:06,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:06,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848443546] [2019-10-13 17:43:06,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992349117] [2019-10-13 17:43:06,679 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 [2019-10-13 17:43:06,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:06,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:06,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:06,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:43:06,767 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:06,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2019-10-13 17:43:06,767 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426902076] [2019-10-13 17:43:06,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:43:06,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:06,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:43:06,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:43:06,770 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 10 states. [2019-10-13 17:43:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:07,047 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2019-10-13 17:43:07,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:07,048 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2019-10-13 17:43:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:07,049 INFO L225 Difference]: With dead ends: 147 [2019-10-13 17:43:07,049 INFO L226 Difference]: Without dead ends: 105 [2019-10-13 17:43:07,050 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:07,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-13 17:43:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2019-10-13 17:43:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 17:43:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2019-10-13 17:43:07,061 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 43 [2019-10-13 17:43:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:07,061 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2019-10-13 17:43:07,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:43:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2019-10-13 17:43:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 17:43:07,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:07,063 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 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, 1, 1] [2019-10-13 17:43:07,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:07,268 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1764017907, now seen corresponding path program 1 times [2019-10-13 17:43:07,269 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:07,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880003013] [2019-10-13 17:43:07,269 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:07,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:07,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:43:07,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880003013] [2019-10-13 17:43:07,372 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:07,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:43:07,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11831363] [2019-10-13 17:43:07,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:43:07,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:07,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:43:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:07,373 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 6 states. [2019-10-13 17:43:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:07,502 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2019-10-13 17:43:07,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:43:07,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-10-13 17:43:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:07,505 INFO L225 Difference]: With dead ends: 110 [2019-10-13 17:43:07,505 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 17:43:07,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:07,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 17:43:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2019-10-13 17:43:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:43:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2019-10-13 17:43:07,528 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 57 [2019-10-13 17:43:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:07,529 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2019-10-13 17:43:07,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:43:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2019-10-13 17:43:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 17:43:07,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:07,532 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:07,533 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash -271902692, now seen corresponding path program 1 times [2019-10-13 17:43:07,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:07,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629333288] [2019-10-13 17:43:07,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:07,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:07,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:43:07,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629333288] [2019-10-13 17:43:07,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793954053] [2019-10-13 17:43:07,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -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 [2019-10-13 17:43:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:07,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:43:07,736 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:07,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-10-13 17:43:07,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825661375] [2019-10-13 17:43:07,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:43:07,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:07,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:43:07,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:43:07,738 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 10 states. [2019-10-13 17:43:07,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:07,952 INFO L93 Difference]: Finished difference Result 164 states and 202 transitions. [2019-10-13 17:43:07,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:43:07,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2019-10-13 17:43:07,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:07,956 INFO L225 Difference]: With dead ends: 164 [2019-10-13 17:43:07,956 INFO L226 Difference]: Without dead ends: 106 [2019-10-13 17:43:07,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-13 17:43:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2019-10-13 17:43:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:43:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2019-10-13 17:43:07,965 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 57 [2019-10-13 17:43:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:07,966 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2019-10-13 17:43:07,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:43:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2019-10-13 17:43:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 17:43:07,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:07,968 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:08,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:08,179 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:08,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1503130170, now seen corresponding path program 2 times [2019-10-13 17:43:08,181 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:08,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671429838] [2019-10-13 17:43:08,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:08,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:08,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:43:08,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671429838] [2019-10-13 17:43:08,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869183179] [2019-10-13 17:43:08,291 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 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 [2019-10-13 17:43:08,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:08,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:08,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:43:08,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:43:08,391 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:08,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-13 17:43:08,392 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090008696] [2019-10-13 17:43:08,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:43:08,393 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:08,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:43:08,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:43:08,393 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 11 states. [2019-10-13 17:43:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:08,702 INFO L93 Difference]: Finished difference Result 172 states and 212 transitions. [2019-10-13 17:43:08,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:08,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2019-10-13 17:43:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:08,703 INFO L225 Difference]: With dead ends: 172 [2019-10-13 17:43:08,704 INFO L226 Difference]: Without dead ends: 114 [2019-10-13 17:43:08,704 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-13 17:43:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 77. [2019-10-13 17:43:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:43:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2019-10-13 17:43:08,713 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 59 [2019-10-13 17:43:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:08,713 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2019-10-13 17:43:08,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:43:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2019-10-13 17:43:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 17:43:08,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:08,715 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:08,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:08,919 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:08,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2087273256, now seen corresponding path program 3 times [2019-10-13 17:43:08,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:08,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822893649] [2019-10-13 17:43:08,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:08,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:08,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:43:09,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822893649] [2019-10-13 17:43:09,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891600630] [2019-10-13 17:43:09,026 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 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 [2019-10-13 17:43:09,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:43:09,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:09,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:09,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 17:43:09,198 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:09,198 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-10-13 17:43:09,198 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239144119] [2019-10-13 17:43:09,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:09,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:09,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:09,200 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 17 states. [2019-10-13 17:43:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:09,893 INFO L93 Difference]: Finished difference Result 198 states and 247 transitions. [2019-10-13 17:43:09,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:43:09,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2019-10-13 17:43:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:09,894 INFO L225 Difference]: With dead ends: 198 [2019-10-13 17:43:09,894 INFO L226 Difference]: Without dead ends: 135 [2019-10-13 17:43:09,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:43:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-13 17:43:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 78. [2019-10-13 17:43:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-13 17:43:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2019-10-13 17:43:09,904 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 61 [2019-10-13 17:43:09,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:09,904 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2019-10-13 17:43:09,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2019-10-13 17:43:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:43:09,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:09,906 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:43:10,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:10,110 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1917828293, now seen corresponding path program 3 times [2019-10-13 17:43:10,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:10,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360838016] [2019-10-13 17:43:10,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:10,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:10,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:43:10,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360838016] [2019-10-13 17:43:10,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202770170] [2019-10-13 17:43:10,278 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 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 [2019-10-13 17:43:10,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:43:10,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:10,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:10,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 17:43:10,454 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:43:10,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2019-10-13 17:43:10,454 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5539047] [2019-10-13 17:43:10,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:43:10,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:10,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:43:10,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:10,455 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 10 states. [2019-10-13 17:43:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:10,706 INFO L93 Difference]: Finished difference Result 144 states and 183 transitions. [2019-10-13 17:43:10,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:43:10,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2019-10-13 17:43:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:10,709 INFO L225 Difference]: With dead ends: 144 [2019-10-13 17:43:10,709 INFO L226 Difference]: Without dead ends: 126 [2019-10-13 17:43:10,710 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-13 17:43:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 92. [2019-10-13 17:43:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-13 17:43:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2019-10-13 17:43:10,720 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 68 [2019-10-13 17:43:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:10,720 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2019-10-13 17:43:10,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:43:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2019-10-13 17:43:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:43:10,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:10,722 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:43:10,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:10,925 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:10,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1578451652, now seen corresponding path program 1 times [2019-10-13 17:43:10,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:10,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039971336] [2019-10-13 17:43:10,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:10,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:10,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:43:11,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039971336] [2019-10-13 17:43:11,024 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:11,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:43:11,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74725666] [2019-10-13 17:43:11,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:43:11,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:11,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:43:11,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:11,026 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 6 states. [2019-10-13 17:43:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:11,149 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2019-10-13 17:43:11,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:43:11,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2019-10-13 17:43:11,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:11,152 INFO L225 Difference]: With dead ends: 139 [2019-10-13 17:43:11,152 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:43:11,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:43:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-10-13 17:43:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-13 17:43:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2019-10-13 17:43:11,161 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 68 [2019-10-13 17:43:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:11,161 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2019-10-13 17:43:11,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:43:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2019-10-13 17:43:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 17:43:11,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:11,162 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:43:11,163 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:11,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:11,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1932290267, now seen corresponding path program 1 times [2019-10-13 17:43:11,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:11,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052377474] [2019-10-13 17:43:11,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:11,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:11,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:11,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052377474] [2019-10-13 17:43:11,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925457932] [2019-10-13 17:43:11,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:43:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:11,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:11,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:11,391 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:11,392 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-10-13 17:43:11,392 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381758700] [2019-10-13 17:43:11,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:11,393 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:11,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:11,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:11,393 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 13 states. [2019-10-13 17:43:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:11,682 INFO L93 Difference]: Finished difference Result 214 states and 260 transitions. [2019-10-13 17:43:11,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:43:11,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-10-13 17:43:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:11,685 INFO L225 Difference]: With dead ends: 214 [2019-10-13 17:43:11,685 INFO L226 Difference]: Without dead ends: 143 [2019-10-13 17:43:11,688 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:43:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-13 17:43:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 94. [2019-10-13 17:43:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-13 17:43:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2019-10-13 17:43:11,703 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 71 [2019-10-13 17:43:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:11,704 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2019-10-13 17:43:11,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2019-10-13 17:43:11,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 17:43:11,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:11,705 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:43:11,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:11,917 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:11,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1104241859, now seen corresponding path program 2 times [2019-10-13 17:43:11,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:11,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614479588] [2019-10-13 17:43:11,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:11,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:11,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:12,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614479588] [2019-10-13 17:43:12,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405159233] [2019-10-13 17:43:12,048 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 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 [2019-10-13 17:43:12,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:12,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:12,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:12,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:12,159 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:12,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-10-13 17:43:12,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128187107] [2019-10-13 17:43:12,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:12,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:12,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:12,161 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand 14 states. [2019-10-13 17:43:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:12,476 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2019-10-13 17:43:12,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:43:12,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2019-10-13 17:43:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:12,478 INFO L225 Difference]: With dead ends: 222 [2019-10-13 17:43:12,478 INFO L226 Difference]: Without dead ends: 151 [2019-10-13 17:43:12,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:43:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-13 17:43:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 96. [2019-10-13 17:43:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-13 17:43:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2019-10-13 17:43:12,487 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 73 [2019-10-13 17:43:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:12,487 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2019-10-13 17:43:12,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:12,487 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2019-10-13 17:43:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-13 17:43:12,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:12,488 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:43:12,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:12,692 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1366146335, now seen corresponding path program 3 times [2019-10-13 17:43:12,693 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:12,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024490093] [2019-10-13 17:43:12,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:12,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:12,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:12,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024490093] [2019-10-13 17:43:12,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941817319] [2019-10-13 17:43:12,859 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 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 [2019-10-13 17:43:12,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:43:12,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:12,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:12,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-13 17:43:12,989 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:12,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 17:43:12,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855337290] [2019-10-13 17:43:12,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:12,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:12,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:12,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:12,991 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 17 states. [2019-10-13 17:43:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:13,436 INFO L93 Difference]: Finished difference Result 285 states and 360 transitions. [2019-10-13 17:43:13,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:43:13,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-10-13 17:43:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:13,438 INFO L225 Difference]: With dead ends: 285 [2019-10-13 17:43:13,438 INFO L226 Difference]: Without dead ends: 214 [2019-10-13 17:43:13,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-10-13 17:43:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 115. [2019-10-13 17:43:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-13 17:43:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2019-10-13 17:43:13,452 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 75 [2019-10-13 17:43:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:13,453 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2019-10-13 17:43:13,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2019-10-13 17:43:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 17:43:13,455 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:13,455 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2019-10-13 17:43:13,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:13,663 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:13,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:13,663 INFO L82 PathProgramCache]: Analyzing trace with hash 349741488, now seen corresponding path program 1 times [2019-10-13 17:43:13,663 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:13,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353936289] [2019-10-13 17:43:13,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:13,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:13,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 17:43:13,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353936289] [2019-10-13 17:43:13,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660251760] [2019-10-13 17:43:13,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:13,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 17:43:13,929 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:13,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-10-13 17:43:13,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532385927] [2019-10-13 17:43:13,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:43:13,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:13,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:43:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:43:13,932 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 16 states. [2019-10-13 17:43:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:14,300 INFO L93 Difference]: Finished difference Result 272 states and 340 transitions. [2019-10-13 17:43:14,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:43:14,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2019-10-13 17:43:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:14,302 INFO L225 Difference]: With dead ends: 272 [2019-10-13 17:43:14,302 INFO L226 Difference]: Without dead ends: 184 [2019-10-13 17:43:14,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-10-13 17:43:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 117. [2019-10-13 17:43:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 17:43:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2019-10-13 17:43:14,317 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 89 [2019-10-13 17:43:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:14,318 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2019-10-13 17:43:14,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:43:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2019-10-13 17:43:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 17:43:14,321 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:14,321 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2019-10-13 17:43:14,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:14,526 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:14,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1006271538, now seen corresponding path program 2 times [2019-10-13 17:43:14,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:14,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594586611] [2019-10-13 17:43:14,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:14,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:14,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 17:43:14,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594586611] [2019-10-13 17:43:14,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847087901] [2019-10-13 17:43:14,724 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:14,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:14,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:14,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:43:14,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 17:43:14,855 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:14,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-10-13 17:43:14,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538900492] [2019-10-13 17:43:14,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:14,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:14,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:14,857 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 17 states. [2019-10-13 17:43:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:15,177 INFO L93 Difference]: Finished difference Result 280 states and 350 transitions. [2019-10-13 17:43:15,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:43:15,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2019-10-13 17:43:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:15,179 INFO L225 Difference]: With dead ends: 280 [2019-10-13 17:43:15,179 INFO L226 Difference]: Without dead ends: 192 [2019-10-13 17:43:15,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-10-13 17:43:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 119. [2019-10-13 17:43:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:43:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2019-10-13 17:43:15,189 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 91 [2019-10-13 17:43:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:15,190 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2019-10-13 17:43:15,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2019-10-13 17:43:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 17:43:15,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:15,191 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2019-10-13 17:43:15,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:15,402 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:15,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1535268460, now seen corresponding path program 3 times [2019-10-13 17:43:15,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:15,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752300005] [2019-10-13 17:43:15,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:15,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:15,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 17:43:15,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752300005] [2019-10-13 17:43:15,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276329095] [2019-10-13 17:43:15,594 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:15,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:43:15,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:15,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 66 conjunts are in the unsatisfiable core [2019-10-13 17:43:15,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:16,162 INFO L341 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2019-10-13 17:43:16,163 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 74 [2019-10-13 17:43:16,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,168 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:16,215 INFO L567 ElimStorePlain]: treesize reduction 53, result has 56.2 percent of original size [2019-10-13 17:43:16,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,219 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-13 17:43:16,220 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:51, output treesize:68 [2019-10-13 17:43:16,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:24,545 WARN L191 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-10-13 17:43:24,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:24,718 INFO L392 ElimStorePlain]: Different costs {2=[|#memory_int|], 12=[v_prenex_3]} [2019-10-13 17:43:24,722 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:43:24,722 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:24,737 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:24,742 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:24,744 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:24,768 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:24,769 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 69 [2019-10-13 17:43:24,770 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:24,792 INFO L567 ElimStorePlain]: treesize reduction 4, result has 86.7 percent of original size [2019-10-13 17:43:24,794 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:24,794 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:83, output treesize:4 [2019-10-13 17:43:24,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-13 17:43:24,941 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:24,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 36 [2019-10-13 17:43:24,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965937858] [2019-10-13 17:43:24,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:43:24,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:43:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:43:24,945 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 36 states. [2019-10-13 17:43:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:29,374 INFO L93 Difference]: Finished difference Result 370 states and 487 transitions. [2019-10-13 17:43:29,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-13 17:43:29,375 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 93 [2019-10-13 17:43:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:29,377 INFO L225 Difference]: With dead ends: 370 [2019-10-13 17:43:29,378 INFO L226 Difference]: Without dead ends: 282 [2019-10-13 17:43:29,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=874, Invalid=4237, Unknown=1, NotChecked=0, Total=5112 [2019-10-13 17:43:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-10-13 17:43:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 152. [2019-10-13 17:43:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-10-13 17:43:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2019-10-13 17:43:29,395 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 93 [2019-10-13 17:43:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:29,396 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2019-10-13 17:43:29,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:43:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2019-10-13 17:43:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:43:29,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:29,398 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2019-10-13 17:43:29,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:29,601 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1755336388, now seen corresponding path program 1 times [2019-10-13 17:43:29,602 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:29,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881908957] [2019-10-13 17:43:29,603 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:29,603 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:29,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-10-13 17:43:29,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881908957] [2019-10-13 17:43:29,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075230654] [2019-10-13 17:43:29,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:29,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:43:29,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:43:30,029 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:30,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 22 [2019-10-13 17:43:30,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3315001] [2019-10-13 17:43:30,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:43:30,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:43:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:30,031 INFO L87 Difference]: Start difference. First operand 152 states and 187 transitions. Second operand 22 states. [2019-10-13 17:43:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:31,796 INFO L93 Difference]: Finished difference Result 455 states and 586 transitions. [2019-10-13 17:43:31,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-10-13 17:43:31,797 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2019-10-13 17:43:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:31,799 INFO L225 Difference]: With dead ends: 455 [2019-10-13 17:43:31,799 INFO L226 Difference]: Without dead ends: 307 [2019-10-13 17:43:31,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1574, Invalid=4906, Unknown=0, NotChecked=0, Total=6480 [2019-10-13 17:43:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2019-10-13 17:43:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 156. [2019-10-13 17:43:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-13 17:43:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2019-10-13 17:43:31,822 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 98 [2019-10-13 17:43:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:31,823 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2019-10-13 17:43:31,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:43:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2019-10-13 17:43:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 17:43:31,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:31,825 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2019-10-13 17:43:32,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:32,030 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash 979044322, now seen corresponding path program 4 times [2019-10-13 17:43:32,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:32,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221261894] [2019-10-13 17:43:32,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:32,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:32,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 17:43:32,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221261894] [2019-10-13 17:43:32,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742378875] [2019-10-13 17:43:32,253 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:32,354 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:32,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:32,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:43:32,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 17:43:32,375 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:32,375 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-10-13 17:43:32,375 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718012608] [2019-10-13 17:43:32,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:43:32,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:43:32,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:43:32,377 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand 20 states. [2019-10-13 17:43:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:32,951 INFO L93 Difference]: Finished difference Result 385 states and 485 transitions. [2019-10-13 17:43:32,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:43:32,951 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2019-10-13 17:43:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:32,953 INFO L225 Difference]: With dead ends: 385 [2019-10-13 17:43:32,954 INFO L226 Difference]: Without dead ends: 264 [2019-10-13 17:43:32,954 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-10-13 17:43:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 158. [2019-10-13 17:43:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-13 17:43:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 193 transitions. [2019-10-13 17:43:32,968 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 193 transitions. Word has length 100 [2019-10-13 17:43:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:32,968 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 193 transitions. [2019-10-13 17:43:32,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:43:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 193 transitions. [2019-10-13 17:43:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:43:32,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:32,970 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2019-10-13 17:43:33,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:33,174 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1384007428, now seen corresponding path program 5 times [2019-10-13 17:43:33,175 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:33,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098097162] [2019-10-13 17:43:33,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:33,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:33,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 17:43:33,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098097162] [2019-10-13 17:43:33,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121927361] [2019-10-13 17:43:33,400 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:33,595 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-13 17:43:33,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:33,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:43:33,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-10-13 17:43:33,850 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:33,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-10-13 17:43:33,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342470185] [2019-10-13 17:43:33,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 17:43:33,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:33,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 17:43:33,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:43:33,853 INFO L87 Difference]: Start difference. First operand 158 states and 193 transitions. Second operand 29 states. [2019-10-13 17:43:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:35,364 INFO L93 Difference]: Finished difference Result 381 states and 483 transitions. [2019-10-13 17:43:35,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-13 17:43:35,365 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 102 [2019-10-13 17:43:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:35,367 INFO L225 Difference]: With dead ends: 381 [2019-10-13 17:43:35,367 INFO L226 Difference]: Without dead ends: 260 [2019-10-13 17:43:35,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=640, Invalid=2330, Unknown=0, NotChecked=0, Total=2970 [2019-10-13 17:43:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-10-13 17:43:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 143. [2019-10-13 17:43:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-13 17:43:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2019-10-13 17:43:35,385 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 102 [2019-10-13 17:43:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:35,386 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2019-10-13 17:43:35,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 17:43:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2019-10-13 17:43:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 17:43:35,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:35,387 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2019-10-13 17:43:35,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:35,592 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 315553691, now seen corresponding path program 1 times [2019-10-13 17:43:35,592 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:35,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737814541] [2019-10-13 17:43:35,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:35,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:35,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-10-13 17:43:35,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737814541] [2019-10-13 17:43:35,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163117975] [2019-10-13 17:43:35,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:35,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:43:35,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 17:43:36,235 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:36,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19] total 26 [2019-10-13 17:43:36,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399731804] [2019-10-13 17:43:36,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:43:36,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:43:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:43:36,237 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand 26 states. [2019-10-13 17:43:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,998 INFO L93 Difference]: Finished difference Result 554 states and 699 transitions. [2019-10-13 17:43:40,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2019-10-13 17:43:40,001 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 112 [2019-10-13 17:43:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,003 INFO L225 Difference]: With dead ends: 554 [2019-10-13 17:43:40,003 INFO L226 Difference]: Without dead ends: 398 [2019-10-13 17:43:40,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5761 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3567, Invalid=13463, Unknown=0, NotChecked=0, Total=17030 [2019-10-13 17:43:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2019-10-13 17:43:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 153. [2019-10-13 17:43:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-10-13 17:43:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2019-10-13 17:43:40,031 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 112 [2019-10-13 17:43:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,031 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2019-10-13 17:43:40,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:43:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2019-10-13 17:43:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 17:43:40,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,034 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:43:40,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,247 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash -320376327, now seen corresponding path program 4 times [2019-10-13 17:43:40,248 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756814601] [2019-10-13 17:43:40,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 17:43:40,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756814601] [2019-10-13 17:43:40,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997335865] [2019-10-13 17:43:40,546 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:40,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:40,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:43:40,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 17:43:40,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:40,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2019-10-13 17:43:40,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775000029] [2019-10-13 17:43:40,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:43:40,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:43:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:40,735 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 23 states. [2019-10-13 17:43:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,354 INFO L93 Difference]: Finished difference Result 466 states and 578 transitions. [2019-10-13 17:43:41,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:43:41,354 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2019-10-13 17:43:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,357 INFO L225 Difference]: With dead ends: 466 [2019-10-13 17:43:41,357 INFO L226 Difference]: Without dead ends: 354 [2019-10-13 17:43:41,358 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:43:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-10-13 17:43:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 155. [2019-10-13 17:43:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-13 17:43:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2019-10-13 17:43:41,387 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 114 [2019-10-13 17:43:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,388 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2019-10-13 17:43:41,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:43:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2019-10-13 17:43:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 17:43:41,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,393 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:43:41,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,599 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2048167323, now seen corresponding path program 5 times [2019-10-13 17:43:41,600 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254056016] [2019-10-13 17:43:41,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 17:43:41,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254056016] [2019-10-13 17:43:41,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021061094] [2019-10-13 17:43:41,899 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:42,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-13 17:43:42,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:42,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:43:42,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 17:43:42,431 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:42,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2019-10-13 17:43:42,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021527396] [2019-10-13 17:43:42,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:43:42,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:42,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:43:42,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:43:42,432 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 24 states. [2019-10-13 17:43:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:43,245 INFO L93 Difference]: Finished difference Result 479 states and 594 transitions. [2019-10-13 17:43:43,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:43:43,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 116 [2019-10-13 17:43:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:43,248 INFO L225 Difference]: With dead ends: 479 [2019-10-13 17:43:43,249 INFO L226 Difference]: Without dead ends: 367 [2019-10-13 17:43:43,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:43:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-10-13 17:43:43,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 157. [2019-10-13 17:43:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-13 17:43:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2019-10-13 17:43:43,278 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 116 [2019-10-13 17:43:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:43,278 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2019-10-13 17:43:43,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:43:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2019-10-13 17:43:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 17:43:43,280 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:43,280 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:43:43,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,485 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1885948093, now seen corresponding path program 6 times [2019-10-13 17:43:43,486 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:43,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125798404] [2019-10-13 17:43:43,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 17:43:43,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125798404] [2019-10-13 17:43:43,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154132255] [2019-10-13 17:43:43,806 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)