java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:03,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:03,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:03,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:03,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:03,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:03,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:03,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:03,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:03,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:03,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:03,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:03,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:03,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:03,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:03,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:03,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:03,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:03,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:03,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:03,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:03,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:03,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:03,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:03,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:46:03,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:46:03,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:46:03,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:46:03,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:46:03,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:46:03,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:03,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:03,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:03,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:03,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:03,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:03,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:03,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:03,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:03,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:03,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:03,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:46:03,644 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:03,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:03,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:03,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:03,646 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:03,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:03,647 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:03,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:03,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:03,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:03,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:03,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:03,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:03,648 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:03,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:03,648 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:03,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:03,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:03,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:03,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:03,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:03,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:03,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:03,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:03,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:03,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:03,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:03,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:03,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:03,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:03,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:03,994 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:03,996 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:03,996 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:03,997 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-10-14 21:46:04,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0e21fdd/1f287aa811ae4a10b2a2dad305459d73/FLAG5c87dd32a [2019-10-14 21:46:04,575 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:04,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-10-14 21:46:04,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0e21fdd/1f287aa811ae4a10b2a2dad305459d73/FLAG5c87dd32a [2019-10-14 21:46:04,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b0e21fdd/1f287aa811ae4a10b2a2dad305459d73 [2019-10-14 21:46:04,945 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:04,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:04,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:04,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:04,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:04,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c7c79bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:04, skipping insertion in model container [2019-10-14 21:46:04,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:04" (1/1) ... [2019-10-14 21:46:04,965 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:04,986 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:05,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:05,196 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:05,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:05,235 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:05,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05 WrapperNode [2019-10-14 21:46:05,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:05,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:05,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:05,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:05,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... [2019-10-14 21:46:05,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:05,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:05,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:05,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:05,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:05,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:05,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:05,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:05,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:05,717 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:05,717 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:46:05,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:05 BoogieIcfgContainer [2019-10-14 21:46:05,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:05,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:05,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:05,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:05,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:04" (1/3) ... [2019-10-14 21:46:05,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf259ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:05, skipping insertion in model container [2019-10-14 21:46:05,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:05" (2/3) ... [2019-10-14 21:46:05,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf259ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:05, skipping insertion in model container [2019-10-14 21:46:05,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:05" (3/3) ... [2019-10-14 21:46:05,726 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2019-10-14 21:46:05,737 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:05,744 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:05,755 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:05,776 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:05,776 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:05,776 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:05,777 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:05,777 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:05,777 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:05,777 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:05,777 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 21:46:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:46:05,796 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:05,796 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:05,798 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1902154591, now seen corresponding path program 1 times [2019-10-14 21:46:05,811 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:05,811 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105705861] [2019-10-14 21:46:05,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:05,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105705861] [2019-10-14 21:46:05,994 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:05,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:05,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333395835] [2019-10-14 21:46:05,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:06,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:06,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:06,018 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 21:46:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,132 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2019-10-14 21:46:06,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:06,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:46:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,144 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:46:06,145 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:46:06,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:46:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:46:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:46:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 21:46:06,194 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2019-10-14 21:46:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,195 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 21:46:06,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 21:46:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:46:06,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,197 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,197 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1137378726, now seen corresponding path program 1 times [2019-10-14 21:46:06,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166326089] [2019-10-14 21:46:06,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:06,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166326089] [2019-10-14 21:46:06,299 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:06,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:06,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401773519] [2019-10-14 21:46:06,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:06,302 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:06,302 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-14 21:46:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,397 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-14 21:46:06,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:06,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 21:46:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,399 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:46:06,400 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:46:06,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:46:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:46:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:46:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 21:46:06,409 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2019-10-14 21:46:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,410 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 21:46:06,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 21:46:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:06,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,411 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,412 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,412 INFO L82 PathProgramCache]: Analyzing trace with hash -62722692, now seen corresponding path program 1 times [2019-10-14 21:46:06,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078564227] [2019-10-14 21:46:06,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:06,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078564227] [2019-10-14 21:46:06,465 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:06,466 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:06,466 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953085154] [2019-10-14 21:46:06,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:06,466 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:06,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:06,467 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-14 21:46:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,561 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2019-10-14 21:46:06,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:06,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:46:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,564 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:46:06,564 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:46:06,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:46:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-14 21:46:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:46:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 21:46:06,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2019-10-14 21:46:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,580 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 21:46:06,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 21:46:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:46:06,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,583 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,583 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1291417548, now seen corresponding path program 1 times [2019-10-14 21:46:06,584 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647353635] [2019-10-14 21:46:06,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:06,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647353635] [2019-10-14 21:46:06,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308441484] [2019-10-14 21:46:06,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:06,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:06,875 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:06,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:46:06,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665798448] [2019-10-14 21:46:06,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:06,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:06,880 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2019-10-14 21:46:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,014 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2019-10-14 21:46:07,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:07,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-14 21:46:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,015 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:46:07,016 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:46:07,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:46:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-14 21:46:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:46:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:46:07,023 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2019-10-14 21:46:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,023 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:46:07,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:46:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:46:07,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,025 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:07,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,230 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:07,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2132493154, now seen corresponding path program 2 times [2019-10-14 21:46:07,232 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:07,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394667564] [2019-10-14 21:46:07,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:07,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394667564] [2019-10-14 21:46:07,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530652091] [2019-10-14 21:46:07,317 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:07,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:07,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:07,410 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:46:07,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947137712] [2019-10-14 21:46:07,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:07,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:07,412 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2019-10-14 21:46:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,512 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-10-14 21:46:07,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:07,512 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-10-14 21:46:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,513 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:46:07,513 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:46:07,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:46:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-14 21:46:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:46:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-10-14 21:46:07,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2019-10-14 21:46:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,528 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-10-14 21:46:07,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-10-14 21:46:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:46:07,530 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,531 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:07,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,732 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1329681088, now seen corresponding path program 3 times [2019-10-14 21:46:07,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:07,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652095313] [2019-10-14 21:46:07,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:07,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652095313] [2019-10-14 21:46:07,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904518271] [2019-10-14 21:46:07,846 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:07,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:07,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:07,933 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,934 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:46:07,934 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981884089] [2019-10-14 21:46:07,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:07,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:07,935 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 10 states. [2019-10-14 21:46:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:08,135 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2019-10-14 21:46:08,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:08,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-10-14 21:46:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:08,137 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:46:08,137 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:46:08,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:46:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-14 21:46:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:46:08,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-10-14 21:46:08,145 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 26 [2019-10-14 21:46:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:08,145 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-10-14 21:46:08,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-10-14 21:46:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:46:08,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:08,147 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:08,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:08,350 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:08,351 INFO L82 PathProgramCache]: Analyzing trace with hash -921201114, now seen corresponding path program 4 times [2019-10-14 21:46:08,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:08,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259832367] [2019-10-14 21:46:08,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:46:08,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259832367] [2019-10-14 21:46:08,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545929230] [2019-10-14 21:46:08,443 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:08,501 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:08,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:08,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:08,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:46:08,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:08,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:46:08,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202143464] [2019-10-14 21:46:08,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:46:08,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:46:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:08,535 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 9 states. [2019-10-14 21:46:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:08,631 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2019-10-14 21:46:08,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:08,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-10-14 21:46:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:08,632 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:46:08,632 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:46:08,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:46:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 21:46:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:46:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2019-10-14 21:46:08,639 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2019-10-14 21:46:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:08,639 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2019-10-14 21:46:08,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:46:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2019-10-14 21:46:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:46:08,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:08,641 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:08,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:08,845 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1716647100, now seen corresponding path program 5 times [2019-10-14 21:46:08,846 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:08,846 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470231230] [2019-10-14 21:46:08,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:46:08,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470231230] [2019-10-14 21:46:08,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095130966] [2019-10-14 21:46:08,969 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,042 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:46:09,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:09,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:09,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:46:09,109 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:09,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-14 21:46:09,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526155204] [2019-10-14 21:46:09,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:09,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:09,111 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 13 states. [2019-10-14 21:46:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:09,325 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-10-14 21:46:09,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:46:09,330 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-10-14 21:46:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:09,331 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:46:09,331 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:46:09,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:46:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-10-14 21:46:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:46:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-10-14 21:46:09,337 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 33 [2019-10-14 21:46:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:09,338 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-10-14 21:46:09,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-10-14 21:46:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:46:09,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:09,339 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:09,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,544 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:09,545 INFO L82 PathProgramCache]: Analyzing trace with hash 949236390, now seen corresponding path program 6 times [2019-10-14 21:46:09,545 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:09,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46034676] [2019-10-14 21:46:09,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:46:09,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46034676] [2019-10-14 21:46:09,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042158259] [2019-10-14 21:46:09,654 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,737 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:46:09,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:09,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:09,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:46:09,824 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:09,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-14 21:46:09,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187213047] [2019-10-14 21:46:09,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:09,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:09,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:09,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:09,826 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 15 states. [2019-10-14 21:46:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:10,092 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2019-10-14 21:46:10,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:10,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-10-14 21:46:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:10,093 INFO L225 Difference]: With dead ends: 85 [2019-10-14 21:46:10,093 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:46:10,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:46:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-10-14 21:46:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:46:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-10-14 21:46:10,100 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 38 [2019-10-14 21:46:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:10,100 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-10-14 21:46:10,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:10,101 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-10-14 21:46:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:46:10,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:10,102 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:10,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:10,307 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash 135156224, now seen corresponding path program 7 times [2019-10-14 21:46:10,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:10,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357780407] [2019-10-14 21:46:10,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:10,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357780407] [2019-10-14 21:46:10,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176850876] [2019-10-14 21:46:10,434 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:46:10,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:10,518 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:10,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:46:10,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503047308] [2019-10-14 21:46:10,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:46:10,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:10,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:46:10,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:10,519 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 12 states. [2019-10-14 21:46:10,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:10,630 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2019-10-14 21:46:10,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:10,630 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2019-10-14 21:46:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:10,631 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:46:10,632 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:46:10,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:46:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-14 21:46:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:46:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2019-10-14 21:46:10,639 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 43 [2019-10-14 21:46:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:10,640 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2019-10-14 21:46:10,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:46:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2019-10-14 21:46:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:46:10,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:10,641 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:10,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:10,845 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:10,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2096630302, now seen corresponding path program 8 times [2019-10-14 21:46:10,846 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:10,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170226150] [2019-10-14 21:46:10,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:10,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170226150] [2019-10-14 21:46:10,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715049286] [2019-10-14 21:46:10,946 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:10,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:10,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:11,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:11,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:11,021 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:11,021 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:46:11,021 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426976923] [2019-10-14 21:46:11,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:11,022 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:11,023 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 13 states. [2019-10-14 21:46:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:11,111 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2019-10-14 21:46:11,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:11,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-10-14 21:46:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:11,113 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:46:11,113 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:46:11,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:46:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 21:46:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:46:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2019-10-14 21:46:11,119 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 45 [2019-10-14 21:46:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:11,119 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2019-10-14 21:46:11,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2019-10-14 21:46:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:46:11,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:11,120 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:11,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:11,324 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1582576316, now seen corresponding path program 9 times [2019-10-14 21:46:11,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:11,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929518403] [2019-10-14 21:46:11,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:11,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:11,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:11,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929518403] [2019-10-14 21:46:11,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248357784] [2019-10-14 21:46:11,484 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:11,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:46:11,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:11,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:11,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:46:11,765 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:11,765 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-10-14 21:46:11,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143949027] [2019-10-14 21:46:11,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:46:11,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:46:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:11,770 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 19 states. [2019-10-14 21:46:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:12,031 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2019-10-14 21:46:12,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:46:12,031 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2019-10-14 21:46:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:12,033 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:46:12,033 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:46:12,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:46:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:46:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-10-14 21:46:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:46:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-10-14 21:46:12,055 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 47 [2019-10-14 21:46:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:12,056 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-10-14 21:46:12,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:46:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-10-14 21:46:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:46:12,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:12,057 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:12,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:12,262 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1818080430, now seen corresponding path program 10 times [2019-10-14 21:46:12,263 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:12,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857045979] [2019-10-14 21:46:12,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:12,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:12,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:46:12,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857045979] [2019-10-14 21:46:12,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038244921] [2019-10-14 21:46:12,424 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:12,496 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:12,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:12,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:12,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:46:12,517 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:12,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:46:12,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397459818] [2019-10-14 21:46:12,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:12,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:12,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:12,519 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 15 states. [2019-10-14 21:46:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:12,630 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2019-10-14 21:46:12,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:12,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-10-14 21:46:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:12,632 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:46:12,632 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:46:12,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:12,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:46:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-14 21:46:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:46:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2019-10-14 21:46:12,639 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 52 [2019-10-14 21:46:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:12,640 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2019-10-14 21:46:12,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2019-10-14 21:46:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:46:12,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:12,641 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:12,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:12,845 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:12,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:12,846 INFO L82 PathProgramCache]: Analyzing trace with hash -679592368, now seen corresponding path program 11 times [2019-10-14 21:46:12,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:12,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737825109] [2019-10-14 21:46:12,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:12,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:12,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:46:13,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737825109] [2019-10-14 21:46:13,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069994322] [2019-10-14 21:46:13,036 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:13,295 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:46:13,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:13,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:46:13,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:46:13,324 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:13,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:46:13,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001364884] [2019-10-14 21:46:13,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:46:13,325 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:46:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:13,325 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 16 states. [2019-10-14 21:46:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:13,437 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2019-10-14 21:46:13,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:13,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2019-10-14 21:46:13,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:13,438 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:46:13,439 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:46:13,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:46:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-14 21:46:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:46:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2019-10-14 21:46:13,451 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 54 [2019-10-14 21:46:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:13,451 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2019-10-14 21:46:13,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:46:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2019-10-14 21:46:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:46:13,455 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:13,456 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:13,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:13,666 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:13,667 INFO L82 PathProgramCache]: Analyzing trace with hash -56432782, now seen corresponding path program 12 times [2019-10-14 21:46:13,667 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:13,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690697694] [2019-10-14 21:46:13,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:46:13,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690697694] [2019-10-14 21:46:13,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680077248] [2019-10-14 21:46:13,814 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 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 [2019-10-14 21:46:14,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:46:14,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:14,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:46:14,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:46:14,516 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:14,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2019-10-14 21:46:14,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036421005] [2019-10-14 21:46:14,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:46:14,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:14,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:46:14,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:46:14,518 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 23 states. [2019-10-14 21:46:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:14,899 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2019-10-14 21:46:14,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:46:14,900 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2019-10-14 21:46:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:14,901 INFO L225 Difference]: With dead ends: 109 [2019-10-14 21:46:14,901 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:46:14,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=832, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:46:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:46:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2019-10-14 21:46:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:46:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2019-10-14 21:46:14,907 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 56 [2019-10-14 21:46:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:14,907 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2019-10-14 21:46:14,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:46:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2019-10-14 21:46:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:46:14,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:14,909 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:15,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:15,110 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:15,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:15,110 INFO L82 PathProgramCache]: Analyzing trace with hash -63148492, now seen corresponding path program 13 times [2019-10-14 21:46:15,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:15,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635266669] [2019-10-14 21:46:15,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:15,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:15,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:46:15,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635266669] [2019-10-14 21:46:15,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751841391] [2019-10-14 21:46:15,285 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:46:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:46:15,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:46:15,392 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:15,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:46:15,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734165679] [2019-10-14 21:46:15,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:46:15,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:46:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:15,395 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 18 states. [2019-10-14 21:46:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:15,548 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2019-10-14 21:46:15,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:46:15,548 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2019-10-14 21:46:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:15,550 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:46:15,550 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:46:15,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:46:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 21:46:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:46:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2019-10-14 21:46:15,555 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 61 [2019-10-14 21:46:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:15,556 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2019-10-14 21:46:15,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:46:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2019-10-14 21:46:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:46:15,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:15,557 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:15,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:15,764 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash -115369262, now seen corresponding path program 14 times [2019-10-14 21:46:15,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:15,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854173014] [2019-10-14 21:46:15,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:15,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:15,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:46:15,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854173014] [2019-10-14 21:46:15,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984439238] [2019-10-14 21:46:15,925 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 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 [2019-10-14 21:46:15,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:15,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:15,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:46:15,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:46:16,030 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:16,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:46:16,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701446980] [2019-10-14 21:46:16,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:46:16,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:16,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:46:16,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:16,031 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 19 states. [2019-10-14 21:46:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:16,157 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2019-10-14 21:46:16,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:46:16,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-10-14 21:46:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:16,159 INFO L225 Difference]: With dead ends: 114 [2019-10-14 21:46:16,159 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:46:16,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:46:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 21:46:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:46:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2019-10-14 21:46:16,164 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 63 [2019-10-14 21:46:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:16,165 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2019-10-14 21:46:16,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:46:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2019-10-14 21:46:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:46:16,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:16,166 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:16,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:16,375 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1240078320, now seen corresponding path program 15 times [2019-10-14 21:46:16,376 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:16,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673113279] [2019-10-14 21:46:16,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:16,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:16,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:46:16,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673113279] [2019-10-14 21:46:16,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644419108] [2019-10-14 21:46:16,580 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 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 [2019-10-14 21:46:16,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:46:16,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:16,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:46:16,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:46:16,842 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:16,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2019-10-14 21:46:16,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079227562] [2019-10-14 21:46:16,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:46:16,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:16,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:46:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:46:16,844 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 27 states. [2019-10-14 21:46:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:17,334 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2019-10-14 21:46:17,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:46:17,335 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2019-10-14 21:46:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:17,335 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:46:17,336 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 21:46:17,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:46:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 21:46:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-10-14 21:46:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 21:46:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2019-10-14 21:46:17,340 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 65 [2019-10-14 21:46:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:17,341 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2019-10-14 21:46:17,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:46:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2019-10-14 21:46:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 21:46:17,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:17,342 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:17,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:17,547 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:17,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:17,547 INFO L82 PathProgramCache]: Analyzing trace with hash -72626566, now seen corresponding path program 16 times [2019-10-14 21:46:17,548 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:17,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130893569] [2019-10-14 21:46:17,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:17,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:17,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:46:17,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130893569] [2019-10-14 21:46:17,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238467702] [2019-10-14 21:46:17,756 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 [2019-10-14 21:46:17,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:17,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:17,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:46:17,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:46:17,871 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:17,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:46:17,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492157077] [2019-10-14 21:46:17,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:46:17,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:17,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:46:17,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:17,873 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 21 states. [2019-10-14 21:46:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:18,013 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2019-10-14 21:46:18,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:46:18,013 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2019-10-14 21:46:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:18,014 INFO L225 Difference]: With dead ends: 124 [2019-10-14 21:46:18,015 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 21:46:18,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 21:46:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-10-14 21:46:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:46:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2019-10-14 21:46:18,020 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 70 [2019-10-14 21:46:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:18,020 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2019-10-14 21:46:18,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:46:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2019-10-14 21:46:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 21:46:18,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:18,021 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:18,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:18,225 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash 854455196, now seen corresponding path program 17 times [2019-10-14 21:46:18,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:18,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261690722] [2019-10-14 21:46:18,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:18,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:18,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:46:18,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261690722] [2019-10-14 21:46:18,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081025688] [2019-10-14 21:46:18,478 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 [2019-10-14 21:46:21,575 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 21:46:21,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:21,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:21,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 21:46:21,770 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:21,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2019-10-14 21:46:21,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226649518] [2019-10-14 21:46:21,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:46:21,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:21,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:46:21,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:46:21,774 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 30 states. [2019-10-14 21:46:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:22,320 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2019-10-14 21:46:22,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:46:22,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2019-10-14 21:46:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:22,321 INFO L225 Difference]: With dead ends: 131 [2019-10-14 21:46:22,321 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:46:22,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2019-10-14 21:46:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:46:22,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-10-14 21:46:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 21:46:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2019-10-14 21:46:22,327 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 72 [2019-10-14 21:46:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:22,327 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2019-10-14 21:46:22,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:46:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2019-10-14 21:46:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 21:46:22,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:22,328 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:22,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:22,535 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1955134922, now seen corresponding path program 18 times [2019-10-14 21:46:22,535 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:22,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20332217] [2019-10-14 21:46:22,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:22,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:22,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:46:22,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20332217] [2019-10-14 21:46:22,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714422654] [2019-10-14 21:46:22,773 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 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 [2019-10-14 21:46:27,613 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 21:46:27,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:27,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:46:27,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:46:27,641 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:27,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 21:46:27,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235165522] [2019-10-14 21:46:27,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:46:27,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:27,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:46:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:46:27,643 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 23 states. [2019-10-14 21:46:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:27,812 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2019-10-14 21:46:27,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:46:27,812 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2019-10-14 21:46:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:27,813 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:46:27,813 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:46:27,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:46:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:46:27,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 21:46:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:46:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2019-10-14 21:46:27,818 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 77 [2019-10-14 21:46:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:27,819 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2019-10-14 21:46:27,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:46:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2019-10-14 21:46:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:46:27,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:27,820 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:28,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:28,021 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1181429352, now seen corresponding path program 19 times [2019-10-14 21:46:28,022 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:28,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975038300] [2019-10-14 21:46:28,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:28,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:28,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:46:28,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975038300] [2019-10-14 21:46:28,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927385791] [2019-10-14 21:46:28,286 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:46:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:28,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:46:28,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:46:28,390 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:28,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:46:28,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90488291] [2019-10-14 21:46:28,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:46:28,391 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:46:28,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:46:28,392 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand 24 states. [2019-10-14 21:46:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:28,568 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2019-10-14 21:46:28,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:46:28,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2019-10-14 21:46:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:28,572 INFO L225 Difference]: With dead ends: 136 [2019-10-14 21:46:28,572 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:46:28,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:46:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:46:28,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 21:46:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:46:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2019-10-14 21:46:28,578 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 79 [2019-10-14 21:46:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:28,578 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2019-10-14 21:46:28,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:46:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2019-10-14 21:46:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:46:28,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:28,579 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:28,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:28,783 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash 679718790, now seen corresponding path program 20 times [2019-10-14 21:46:28,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:28,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864892432] [2019-10-14 21:46:28,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:28,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:28,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:46:29,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864892432] [2019-10-14 21:46:29,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844290526] [2019-10-14 21:46:29,086 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 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 [2019-10-14 21:46:29,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:29,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:29,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:46:29,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:46:29,198 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:29,198 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:46:29,198 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887249276] [2019-10-14 21:46:29,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:46:29,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:46:29,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:46:29,200 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 25 states. [2019-10-14 21:46:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:29,392 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2019-10-14 21:46:29,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:46:29,393 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-10-14 21:46:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:29,394 INFO L225 Difference]: With dead ends: 138 [2019-10-14 21:46:29,394 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 21:46:29,395 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:46:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 21:46:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-14 21:46:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 21:46:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2019-10-14 21:46:29,400 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 81 [2019-10-14 21:46:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:29,401 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2019-10-14 21:46:29,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:46:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2019-10-14 21:46:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:46:29,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:29,402 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:29,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:29,606 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:29,606 INFO L82 PathProgramCache]: Analyzing trace with hash -427794140, now seen corresponding path program 21 times [2019-10-14 21:46:29,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:29,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204182286] [2019-10-14 21:46:29,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:29,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:29,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:46:29,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204182286] [2019-10-14 21:46:29,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060357810] [2019-10-14 21:46:29,898 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:30,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:46:30,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:30,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:46:30,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-14 21:46:30,783 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:30,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 35 [2019-10-14 21:46:30,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894847969] [2019-10-14 21:46:30,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:46:30,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:46:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=847, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:46:30,785 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 35 states. [2019-10-14 21:46:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:31,434 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2019-10-14 21:46:31,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:46:31,434 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2019-10-14 21:46:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:31,435 INFO L225 Difference]: With dead ends: 145 [2019-10-14 21:46:31,435 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:46:31,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1091, Invalid=2101, Unknown=0, NotChecked=0, Total=3192 [2019-10-14 21:46:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:46:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-10-14 21:46:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 21:46:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2019-10-14 21:46:31,441 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 83 [2019-10-14 21:46:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:31,442 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2019-10-14 21:46:31,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:46:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2019-10-14 21:46:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 21:46:31,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:31,443 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:31,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:31,647 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash -921230266, now seen corresponding path program 22 times [2019-10-14 21:46:31,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:31,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593814464] [2019-10-14 21:46:31,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:31,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:31,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 21:46:32,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593814464] [2019-10-14 21:46:32,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425382806] [2019-10-14 21:46:32,072 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:32,191 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:32,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:32,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:46:32,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 21:46:32,210 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:32,210 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:46:32,210 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112621862] [2019-10-14 21:46:32,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:46:32,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:46:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:46:32,211 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 27 states. [2019-10-14 21:46:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:32,388 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2019-10-14 21:46:32,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:46:32,389 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2019-10-14 21:46:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:32,390 INFO L225 Difference]: With dead ends: 148 [2019-10-14 21:46:32,390 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:46:32,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:46:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:46:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-10-14 21:46:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 21:46:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2019-10-14 21:46:32,395 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 88 [2019-10-14 21:46:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:32,395 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2019-10-14 21:46:32,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:46:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2019-10-14 21:46:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 21:46:32,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:32,396 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:32,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:32,600 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1687880936, now seen corresponding path program 23 times [2019-10-14 21:46:32,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:32,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690030295] [2019-10-14 21:46:32,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:32,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:32,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 21:46:32,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690030295] [2019-10-14 21:46:32,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093055115] [2019-10-14 21:46:32,927 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:42,902 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-14 21:46:42,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:42,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:42,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-14 21:46:43,131 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:43,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2019-10-14 21:46:43,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522807350] [2019-10-14 21:46:43,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:46:43,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:43,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:46:43,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:46:43,134 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 38 states. [2019-10-14 21:46:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:43,916 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2019-10-14 21:46:43,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:46:43,916 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2019-10-14 21:46:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:43,917 INFO L225 Difference]: With dead ends: 155 [2019-10-14 21:46:43,918 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:46:43,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1292, Invalid=2490, Unknown=0, NotChecked=0, Total=3782 [2019-10-14 21:46:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:46:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2019-10-14 21:46:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 21:46:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2019-10-14 21:46:43,927 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 90 [2019-10-14 21:46:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:43,928 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2019-10-14 21:46:43,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:46:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2019-10-14 21:46:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:46:43,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:43,929 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:44,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:44,136 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1621118334, now seen corresponding path program 24 times [2019-10-14 21:46:44,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:44,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128546824] [2019-10-14 21:46:44,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:44,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:44,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:46:44,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128546824] [2019-10-14 21:46:44,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910889853] [2019-10-14 21:46:44,466 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true