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_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:46:29,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:46:29,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:46:29,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:46:29,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:46:29,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:46:29,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:46:29,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:46:29,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:46:29,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:46:29,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:46:29,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:46:29,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:46:29,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:46:29,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:46:29,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:46:29,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:46:29,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:46:29,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:46:29,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:46:29,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:46:29,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:46:29,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:46:29,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:46:29,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:46:29,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:46:29,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:46:29,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:46:29,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:46:29,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:46:29,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:46:29,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:46:29,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:46:29,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:46:29,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:46:29,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:46:29,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:46:29,672 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:46:29,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:46:29,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:46:29,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:46:29,674 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:46:29,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:46:29,675 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:46:29,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:46:29,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:46:29,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:46:29,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:46:29,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:46:29,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:46:29,676 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:46:29,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:46:29,676 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:46:29,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:46:29,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:46:29,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:46:29,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:46:29,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:46:29,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:46:29,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:46:29,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:46:29,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:46:29,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:46:29,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:46:29,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:46:29,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:46:29,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:46:29,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:46:29,995 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:46:29,997 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:46:29,998 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:46:29,998 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2019-10-13 17:46:30,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd52c513/4c85d8e468744734a0887b2bebf2946e/FLAG63d070f52 [2019-10-13 17:46:30,508 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:46:30,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2019-10-13 17:46:30,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd52c513/4c85d8e468744734a0887b2bebf2946e/FLAG63d070f52 [2019-10-13 17:46:30,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd52c513/4c85d8e468744734a0887b2bebf2946e [2019-10-13 17:46:30,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:46:30,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:46:30,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:46:30,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:46:30,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:46:30,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:46:30" (1/1) ... [2019-10-13 17:46:30,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc444e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:30, skipping insertion in model container [2019-10-13 17:46:30,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:46:30" (1/1) ... [2019-10-13 17:46:30,905 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:46:30,923 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:46:31,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:46:31,108 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:46:31,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:46:31,147 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:46:31,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31 WrapperNode [2019-10-13 17:46:31,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:46:31,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:46:31,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:46:31,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:46:31,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (1/1) ... [2019-10-13 17:46:31,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (1/1) ... [2019-10-13 17:46:31,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (1/1) ... [2019-10-13 17:46:31,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (1/1) ... [2019-10-13 17:46:31,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (1/1) ... [2019-10-13 17:46:31,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (1/1) ... [2019-10-13 17:46:31,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (1/1) ... [2019-10-13 17:46:31,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:46:31,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:46:31,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:46:31,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:46:31,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:46:31,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:46:31,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:46:31,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:46:31,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:46:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:46:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:46:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:46:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:46:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:46:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:46:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:46:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:46:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:46:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:46:31,652 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:46:31,652 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:46:31,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:46:31 BoogieIcfgContainer [2019-10-13 17:46:31,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:46:31,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:46:31,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:46:31,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:46:31,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:46:30" (1/3) ... [2019-10-13 17:46:31,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7f5407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:46:31, skipping insertion in model container [2019-10-13 17:46:31,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:31" (2/3) ... [2019-10-13 17:46:31,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7f5407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:46:31, skipping insertion in model container [2019-10-13 17:46:31,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:46:31" (3/3) ... [2019-10-13 17:46:31,662 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2019-10-13 17:46:31,673 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:46:31,681 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:46:31,693 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:46:31,718 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:46:31,718 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:46:31,718 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:46:31,718 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:46:31,718 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:46:31,718 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:46:31,718 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:46:31,718 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:46:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-13 17:46:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:46:31,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:31,740 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:31,742 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:31,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:31,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1241254978, now seen corresponding path program 1 times [2019-10-13 17:46:31,754 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:31,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899752901] [2019-10-13 17:46:31,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:31,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:31,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:46:31,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899752901] [2019-10-13 17:46:31,928 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:46:31,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:46:31,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381163851] [2019-10-13 17:46:31,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:46:31,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:46:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:46:31,952 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-13 17:46:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:32,074 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-10-13 17:46:32,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:46:32,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-13 17:46:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:32,084 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:46:32,085 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 17:46:32,088 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 [2019-10-13 17:46:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 17:46:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 17:46:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 17:46:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-10-13 17:46:32,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-10-13 17:46:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:32,128 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-10-13 17:46:32,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:46:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-10-13 17:46:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:46:32,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:32,129 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:32,130 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:32,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash -159068691, now seen corresponding path program 1 times [2019-10-13 17:46:32,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:32,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531415062] [2019-10-13 17:46:32,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:32,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:32,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:46:32,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531415062] [2019-10-13 17:46:32,208 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:46:32,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:46:32,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948612799] [2019-10-13 17:46:32,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:46:32,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:46:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:32,212 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-10-13 17:46:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:32,289 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-10-13 17:46:32,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:46:32,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-13 17:46:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:32,291 INFO L225 Difference]: With dead ends: 40 [2019-10-13 17:46:32,291 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 17:46:32,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 17:46:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-13 17:46:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 17:46:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-13 17:46:32,301 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-10-13 17:46:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:32,301 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-13 17:46:32,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:46:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-13 17:46:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 17:46:32,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:32,303 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:32,303 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:32,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1675123339, now seen corresponding path program 1 times [2019-10-13 17:46:32,304 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:32,305 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101321197] [2019-10-13 17:46:32,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:32,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:32,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:32,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101321197] [2019-10-13 17:46:32,415 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:46:32,416 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:46:32,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726393469] [2019-10-13 17:46:32,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:46:32,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:32,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:46:32,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:32,424 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-10-13 17:46:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:32,506 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-13 17:46:32,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:46:32,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-13 17:46:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:32,508 INFO L225 Difference]: With dead ends: 38 [2019-10-13 17:46:32,508 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:46:32,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:46:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-13 17:46:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 17:46:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-13 17:46:32,515 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-10-13 17:46:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:32,516 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-13 17:46:32,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:46:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-13 17:46:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:46:32,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:32,517 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:32,517 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash 99818017, now seen corresponding path program 1 times [2019-10-13 17:46:32,518 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:32,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304252391] [2019-10-13 17:46:32,519 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:32,519 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:32,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:32,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304252391] [2019-10-13 17:46:32,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14306582] [2019-10-13 17:46:32,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:32,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:46:32,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:32,755 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:32,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:46:32,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846825682] [2019-10-13 17:46:32,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:46:32,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:46:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:46:32,761 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-13 17:46:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:32,872 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-13 17:46:32,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:46:32,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-13 17:46:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:32,874 INFO L225 Difference]: With dead ends: 44 [2019-10-13 17:46:32,874 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:46:32,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:46:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:46:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:46:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:46:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-13 17:46:32,895 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-13 17:46:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:32,896 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-13 17:46:32,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:46:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-13 17:46:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:46:32,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:32,897 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:33,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:33,103 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:33,104 INFO L82 PathProgramCache]: Analyzing trace with hash -392904637, now seen corresponding path program 2 times [2019-10-13 17:46:33,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:33,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429757135] [2019-10-13 17:46:33,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:33,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:33,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:33,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429757135] [2019-10-13 17:46:33,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705748114] [2019-10-13 17:46:33,218 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:33,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:33,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:33,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:46:33,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:33,285 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:33,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:46:33,285 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334656185] [2019-10-13 17:46:33,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:46:33,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:33,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:46:33,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:46:33,287 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2019-10-13 17:46:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:33,358 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-10-13 17:46:33,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:46:33,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-10-13 17:46:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:33,359 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:46:33,359 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 17:46:33,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:46:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 17:46:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 17:46:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:46:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-13 17:46:33,367 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2019-10-13 17:46:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:33,367 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-13 17:46:33,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:46:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-13 17:46:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:46:33,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:33,368 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:33,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:33,572 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1452972571, now seen corresponding path program 3 times [2019-10-13 17:46:33,573 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:33,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371878470] [2019-10-13 17:46:33,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:33,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:33,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:33,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371878470] [2019-10-13 17:46:33,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482108010] [2019-10-13 17:46:33,695 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 [2019-10-13 17:46:33,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:46:33,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:33,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:46:33,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:46:33,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:33,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 17:46:33,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726527050] [2019-10-13 17:46:33,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:46:33,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:33,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:46:33,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:46:33,771 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2019-10-13 17:46:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:33,859 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-10-13 17:46:33,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:46:33,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-13 17:46:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:33,861 INFO L225 Difference]: With dead ends: 53 [2019-10-13 17:46:33,861 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:46:33,861 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:46:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:46:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-13 17:46:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:46:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-13 17:46:33,867 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2019-10-13 17:46:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:33,868 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-13 17:46:33,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:46:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-13 17:46:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 17:46:33,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:33,869 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:34,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:34,071 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:34,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1548834779, now seen corresponding path program 4 times [2019-10-13 17:46:34,072 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:34,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571608081] [2019-10-13 17:46:34,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:34,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:34,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:46:34,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571608081] [2019-10-13 17:46:34,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574793678] [2019-10-13 17:46:34,191 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 [2019-10-13 17:46:34,244 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:46:34,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:34,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:46:34,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:46:34,264 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:34,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:46:34,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474633034] [2019-10-13 17:46:34,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:46:34,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:34,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:46:34,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:46:34,266 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-10-13 17:46:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:34,374 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-10-13 17:46:34,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:46:34,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-10-13 17:46:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:34,375 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:46:34,375 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:46:34,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:46:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:46:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-13 17:46:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 17:46:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-13 17:46:34,382 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2019-10-13 17:46:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:34,382 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-13 17:46:34,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:46:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-13 17:46:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 17:46:34,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:34,383 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:34,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:34,590 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:34,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:34,590 INFO L82 PathProgramCache]: Analyzing trace with hash 927516739, now seen corresponding path program 5 times [2019-10-13 17:46:34,590 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:34,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557332729] [2019-10-13 17:46:34,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:34,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:34,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:46:34,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557332729] [2019-10-13 17:46:34,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635633437] [2019-10-13 17:46:34,726 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 [2019-10-13 17:46:34,786 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:46:34,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:34,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:46:34,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:46:34,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:34,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:46:34,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244688440] [2019-10-13 17:46:34,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:46:34,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:34,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:46:34,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:46:34,829 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2019-10-13 17:46:34,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:34,957 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2019-10-13 17:46:34,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:46:34,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-10-13 17:46:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:34,960 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:46:34,960 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:46:34,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:46:34,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:46:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-13 17:46:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:46:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-13 17:46:34,969 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2019-10-13 17:46:34,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:34,969 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-13 17:46:34,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:46:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-13 17:46:34,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:46:34,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:34,971 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:35,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:35,183 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash -649169909, now seen corresponding path program 6 times [2019-10-13 17:46:35,184 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:35,184 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561754544] [2019-10-13 17:46:35,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:35,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:35,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:46:35,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561754544] [2019-10-13 17:46:35,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222977030] [2019-10-13 17:46:35,283 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 [2019-10-13 17:46:35,325 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-13 17:46:35,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:35,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:46:35,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:35,476 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 17:46:35,477 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:46:35,483 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:46:35,484 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:46:35,484 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:46:35,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:46:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-13 17:46:35,548 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:35,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-13 17:46:35,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491255019] [2019-10-13 17:46:35,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:46:35,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:46:35,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:46:35,552 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 18 states. [2019-10-13 17:46:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:36,012 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2019-10-13 17:46:36,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:46:36,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2019-10-13 17:46:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:36,015 INFO L225 Difference]: With dead ends: 84 [2019-10-13 17:46:36,016 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:46:36,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:46:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:46:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-10-13 17:46:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:46:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-10-13 17:46:36,029 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 36 [2019-10-13 17:46:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:36,030 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-10-13 17:46:36,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:46:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-10-13 17:46:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:46:36,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:36,031 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:36,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:36,235 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash 233486379, now seen corresponding path program 1 times [2019-10-13 17:46:36,236 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:36,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960053512] [2019-10-13 17:46:36,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:36,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:36,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:46:36,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960053512] [2019-10-13 17:46:36,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805694002] [2019-10-13 17:46:36,390 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-10-13 17:46:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:36,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:46:36,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:46:36,455 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:36,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:46:36,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263017819] [2019-10-13 17:46:36,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:46:36,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:46:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:46:36,457 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 12 states. [2019-10-13 17:46:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:36,576 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2019-10-13 17:46:36,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:46:36,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2019-10-13 17:46:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:36,579 INFO L225 Difference]: With dead ends: 92 [2019-10-13 17:46:36,579 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:46:36,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:46:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:46:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-13 17:46:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:46:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-10-13 17:46:36,588 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 38 [2019-10-13 17:46:36,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:36,588 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-10-13 17:46:36,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:46:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-10-13 17:46:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:46:36,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:36,590 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:36,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:36,803 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:36,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1236280883, now seen corresponding path program 2 times [2019-10-13 17:46:36,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:36,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138667979] [2019-10-13 17:46:36,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:36,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:36,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:46:36,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138667979] [2019-10-13 17:46:36,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314782110] [2019-10-13 17:46:36,928 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 [2019-10-13 17:46:36,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:36,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:36,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:46:36,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:46:37,003 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:37,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:46:37,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468749195] [2019-10-13 17:46:37,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:46:37,006 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:46:37,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:46:37,010 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 13 states. [2019-10-13 17:46:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:37,122 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2019-10-13 17:46:37,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:46:37,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-10-13 17:46:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:37,124 INFO L225 Difference]: With dead ends: 94 [2019-10-13 17:46:37,124 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 17:46:37,126 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:46:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 17:46:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-13 17:46:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-13 17:46:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2019-10-13 17:46:37,133 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 40 [2019-10-13 17:46:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:37,134 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2019-10-13 17:46:37,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:46:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2019-10-13 17:46:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:46:37,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:37,135 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:37,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:37,345 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash -638379281, now seen corresponding path program 3 times [2019-10-13 17:46:37,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:37,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919886172] [2019-10-13 17:46:37,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:37,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:37,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:46:37,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919886172] [2019-10-13 17:46:37,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069158139] [2019-10-13 17:46:37,464 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 [2019-10-13 17:46:37,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:46:37,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:37,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:46:37,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:37,716 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:46:37,717 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-10-13 17:46:37,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:46:37,719 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:46:37,724 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:46:37,724 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:46:37,724 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-13 17:46:37,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:46:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 17:46:37,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:37,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-10-13 17:46:37,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060327424] [2019-10-13 17:46:37,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:46:37,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:37,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:46:37,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:46:37,786 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 23 states. [2019-10-13 17:46:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:38,749 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2019-10-13 17:46:38,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:46:38,750 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2019-10-13 17:46:38,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:38,751 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:46:38,751 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:46:38,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=1221, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:46:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:46:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2019-10-13 17:46:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:46:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2019-10-13 17:46:38,761 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2019-10-13 17:46:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:38,761 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2019-10-13 17:46:38,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:46:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2019-10-13 17:46:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:46:38,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:38,763 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:38,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:38,977 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:38,978 INFO L82 PathProgramCache]: Analyzing trace with hash 115460810, now seen corresponding path program 1 times [2019-10-13 17:46:38,978 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:38,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633603681] [2019-10-13 17:46:38,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:38,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:38,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:46:39,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633603681] [2019-10-13 17:46:39,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977093837] [2019-10-13 17:46:39,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:39,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:46:39,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:46:39,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:39,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:46:39,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173274219] [2019-10-13 17:46:39,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:46:39,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:46:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:46:39,230 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 15 states. [2019-10-13 17:46:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:39,357 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2019-10-13 17:46:39,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:46:39,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-10-13 17:46:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:39,359 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:46:39,359 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:46:39,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:46:39,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:46:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-13 17:46:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:46:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-10-13 17:46:39,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 52 [2019-10-13 17:46:39,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:39,368 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-10-13 17:46:39,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:46:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-10-13 17:46:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:46:39,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:39,369 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:39,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:39,574 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1072535316, now seen corresponding path program 2 times [2019-10-13 17:46:39,574 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:39,574 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149171743] [2019-10-13 17:46:39,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:39,575 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:39,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:46:39,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149171743] [2019-10-13 17:46:39,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673205701] [2019-10-13 17:46:39,702 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:39,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:39,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:39,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:46:39,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:46:39,789 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:39,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:46:39,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223894432] [2019-10-13 17:46:39,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:46:39,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:39,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:46:39,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:46:39,791 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 16 states. [2019-10-13 17:46:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:39,902 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2019-10-13 17:46:39,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:46:39,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2019-10-13 17:46:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:39,904 INFO L225 Difference]: With dead ends: 88 [2019-10-13 17:46:39,904 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 17:46:39,905 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:46:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 17:46:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-13 17:46:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-13 17:46:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-10-13 17:46:39,912 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 54 [2019-10-13 17:46:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:39,912 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-10-13 17:46:39,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:46:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-10-13 17:46:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:46:39,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:39,913 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:40,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:40,118 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash -275511666, now seen corresponding path program 3 times [2019-10-13 17:46:40,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:40,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915035503] [2019-10-13 17:46:40,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:40,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:40,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:46:40,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915035503] [2019-10-13 17:46:40,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156712673] [2019-10-13 17:46:40,306 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:40,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:46:40,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:40,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:46:40,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-13 17:46:40,417 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:40,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-13 17:46:40,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756777831] [2019-10-13 17:46:40,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:46:40,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:46:40,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:46:40,419 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 20 states. [2019-10-13 17:46:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:40,621 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2019-10-13 17:46:40,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:46:40,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2019-10-13 17:46:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:40,625 INFO L225 Difference]: With dead ends: 95 [2019-10-13 17:46:40,626 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:46:40,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:46:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:46:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-10-13 17:46:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-13 17:46:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-10-13 17:46:40,645 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 56 [2019-10-13 17:46:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:40,645 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-10-13 17:46:40,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:46:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-10-13 17:46:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 17:46:40,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:40,647 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:40,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:40,850 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1179500886, now seen corresponding path program 4 times [2019-10-13 17:46:40,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:40,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534962425] [2019-10-13 17:46:40,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:40,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:40,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:46:41,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534962425] [2019-10-13 17:46:41,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360960261] [2019-10-13 17:46:41,028 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:41,103 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:46:41,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:41,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:46:41,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:46:41,149 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:41,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:46:41,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320556447] [2019-10-13 17:46:41,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:46:41,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:46:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:46:41,151 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 18 states. [2019-10-13 17:46:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:41,282 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2019-10-13 17:46:41,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:46:41,283 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2019-10-13 17:46:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:41,284 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:46:41,285 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:46:41,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:46:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:46:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-13 17:46:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 17:46:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2019-10-13 17:46:41,298 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 61 [2019-10-13 17:46:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:41,299 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2019-10-13 17:46:41,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:46:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2019-10-13 17:46:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:46:41,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:41,301 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:41,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:41,507 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:41,507 INFO L82 PathProgramCache]: Analyzing trace with hash 471099080, now seen corresponding path program 5 times [2019-10-13 17:46:41,508 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:41,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457026812] [2019-10-13 17:46:41,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:41,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:41,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:46:41,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457026812] [2019-10-13 17:46:41,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853689526] [2019-10-13 17:46:41,701 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:41,865 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-13 17:46:41,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:41,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:46:41,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:46:41,893 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:41,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:46:41,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601423111] [2019-10-13 17:46:41,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:46:41,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:46:41,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:46:41,895 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 19 states. [2019-10-13 17:46:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:42,062 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2019-10-13 17:46:42,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:46:42,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-10-13 17:46:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:42,064 INFO L225 Difference]: With dead ends: 100 [2019-10-13 17:46:42,064 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 17:46:42,065 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:46:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 17:46:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-13 17:46:42,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-13 17:46:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-10-13 17:46:42,080 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 63 [2019-10-13 17:46:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:42,081 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-10-13 17:46:42,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:46:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-10-13 17:46:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 17:46:42,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:42,084 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:42,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:42,290 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1854734182, now seen corresponding path program 6 times [2019-10-13 17:46:42,291 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:42,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760012656] [2019-10-13 17:46:42,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:42,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:42,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:46:42,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760012656] [2019-10-13 17:46:42,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677895784] [2019-10-13 17:46:42,510 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:42,581 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 17:46:42,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:42,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:46:42,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-10-13 17:46:42,686 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:42,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-13 17:46:42,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920094156] [2019-10-13 17:46:42,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:46:42,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:46:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:46:42,688 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 24 states. [2019-10-13 17:46:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:42,806 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2019-10-13 17:46:42,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:46:42,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2019-10-13 17:46:42,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:42,808 INFO L225 Difference]: With dead ends: 107 [2019-10-13 17:46:42,808 INFO L226 Difference]: Without dead ends: 76 [2019-10-13 17:46:42,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:46:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-13 17:46:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-10-13 17:46:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:46:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2019-10-13 17:46:42,814 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 65 [2019-10-13 17:46:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:42,815 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2019-10-13 17:46:42,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:46:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2019-10-13 17:46:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 17:46:42,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:42,816 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:43,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:43,020 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash 959641942, now seen corresponding path program 7 times [2019-10-13 17:46:43,023 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:43,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316132174] [2019-10-13 17:46:43,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:43,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:43,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 17:46:43,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316132174] [2019-10-13 17:46:43,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149889441] [2019-10-13 17:46:43,264 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:43,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:46:43,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 17:46:43,352 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:43,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:46:43,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955926344] [2019-10-13 17:46:43,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:46:43,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:46:43,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:46:43,354 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 21 states. [2019-10-13 17:46:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:43,457 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2019-10-13 17:46:43,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:46:43,457 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2019-10-13 17:46:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:43,458 INFO L225 Difference]: With dead ends: 110 [2019-10-13 17:46:43,458 INFO L226 Difference]: Without dead ends: 76 [2019-10-13 17:46:43,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:46:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-13 17:46:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-13 17:46:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:46:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2019-10-13 17:46:43,465 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 70 [2019-10-13 17:46:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:43,466 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2019-10-13 17:46:43,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:46:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2019-10-13 17:46:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 17:46:43,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:43,467 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:43,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:43,670 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:43,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2136543992, now seen corresponding path program 8 times [2019-10-13 17:46:43,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:43,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748040212] [2019-10-13 17:46:43,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:43,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:43,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 17:46:43,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748040212] [2019-10-13 17:46:43,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136381025] [2019-10-13 17:46:43,910 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:43,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:43,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:43,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:46:43,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 17:46:43,992 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:43,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-13 17:46:43,993 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742120609] [2019-10-13 17:46:43,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:46:43,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:46:43,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:46:43,994 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 22 states. [2019-10-13 17:46:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:44,146 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2019-10-13 17:46:44,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:46:44,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2019-10-13 17:46:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:44,147 INFO L225 Difference]: With dead ends: 112 [2019-10-13 17:46:44,147 INFO L226 Difference]: Without dead ends: 78 [2019-10-13 17:46:44,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:46:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-13 17:46:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-13 17:46:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:46:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2019-10-13 17:46:44,153 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 72 [2019-10-13 17:46:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:44,153 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2019-10-13 17:46:44,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:46:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2019-10-13 17:46:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 17:46:44,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:44,154 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:44,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:44,358 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:44,359 INFO L82 PathProgramCache]: Analyzing trace with hash -731952102, now seen corresponding path program 9 times [2019-10-13 17:46:44,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:44,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364089046] [2019-10-13 17:46:44,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:44,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:44,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 17:46:44,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364089046] [2019-10-13 17:46:44,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872909822] [2019-10-13 17:46:44,630 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:44,691 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:46:44,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:44,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:46:44,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-13 17:46:44,821 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:44,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-13 17:46:44,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651906959] [2019-10-13 17:46:44,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:46:44,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:44,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:46:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:46:44,823 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 28 states. [2019-10-13 17:46:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:45,079 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2019-10-13 17:46:45,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 17:46:45,080 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2019-10-13 17:46:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:45,081 INFO L225 Difference]: With dead ends: 119 [2019-10-13 17:46:45,081 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:46:45,082 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:46:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:46:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2019-10-13 17:46:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-13 17:46:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2019-10-13 17:46:45,088 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 74 [2019-10-13 17:46:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:45,089 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2019-10-13 17:46:45,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:46:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2019-10-13 17:46:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-13 17:46:45,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:45,090 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:45,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:45,294 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:45,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1019932130, now seen corresponding path program 10 times [2019-10-13 17:46:45,295 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:45,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741577033] [2019-10-13 17:46:45,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:45,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:45,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:46:45,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741577033] [2019-10-13 17:46:45,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476189710] [2019-10-13 17:46:45,582 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:45,672 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:46:45,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:45,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:46:45,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:46:45,711 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:45,711 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:46:45,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73729144] [2019-10-13 17:46:45,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:46:45,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:46:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:46:45,718 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 24 states. [2019-10-13 17:46:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:45,894 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2019-10-13 17:46:45,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:46:45,897 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2019-10-13 17:46:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:45,898 INFO L225 Difference]: With dead ends: 122 [2019-10-13 17:46:45,898 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:46:45,899 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:46:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:46:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-10-13 17:46:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-13 17:46:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2019-10-13 17:46:45,906 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 79 [2019-10-13 17:46:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:45,906 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2019-10-13 17:46:45,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:46:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2019-10-13 17:46:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-13 17:46:45,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:45,907 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:46,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:46,111 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash -900419908, now seen corresponding path program 11 times [2019-10-13 17:46:46,112 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:46,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409344728] [2019-10-13 17:46:46,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:46,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:46,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:46:46,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409344728] [2019-10-13 17:46:46,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554146642] [2019-10-13 17:46:46,400 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:46,706 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-13 17:46:46,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:46,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:46:46,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:46:46,754 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:46,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:46:46,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013820236] [2019-10-13 17:46:46,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:46:46,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:46,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:46:46,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:46:46,756 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 25 states. [2019-10-13 17:46:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:46,864 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2019-10-13 17:46:46,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:46:46,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-10-13 17:46:46,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:46,866 INFO L225 Difference]: With dead ends: 124 [2019-10-13 17:46:46,866 INFO L226 Difference]: Without dead ends: 87 [2019-10-13 17:46:46,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:46:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-13 17:46:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-13 17:46:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-13 17:46:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2019-10-13 17:46:46,872 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 81 [2019-10-13 17:46:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:46,873 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2019-10-13 17:46:46,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:46:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2019-10-13 17:46:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-13 17:46:46,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:46,874 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:47,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:47,080 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2013291558, now seen corresponding path program 12 times [2019-10-13 17:46:47,081 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:47,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304041411] [2019-10-13 17:46:47,081 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:47,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:47,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:46:47,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304041411] [2019-10-13 17:46:47,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977275464] [2019-10-13 17:46:47,424 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:47,523 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-13 17:46:47,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:47,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:46:47,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:47,771 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 17:46:47,771 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:46:47,774 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:46:47,774 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:46:47,774 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:46:47,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:46:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2019-10-13 17:46:47,898 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:47,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 37 [2019-10-13 17:46:47,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585242397] [2019-10-13 17:46:47,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:46:47,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:46:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:46:47,901 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 37 states. [2019-10-13 17:46:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:49,107 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2019-10-13 17:46:49,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 17:46:49,107 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2019-10-13 17:46:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:49,109 INFO L225 Difference]: With dead ends: 154 [2019-10-13 17:46:49,109 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 17:46:49,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=922, Invalid=3770, Unknown=0, NotChecked=0, Total=4692 [2019-10-13 17:46:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 17:46:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2019-10-13 17:46:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-13 17:46:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2019-10-13 17:46:49,118 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 83 [2019-10-13 17:46:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:49,118 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2019-10-13 17:46:49,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:46:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2019-10-13 17:46:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 17:46:49,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:49,121 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:49,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:49,325 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:49,326 INFO L82 PathProgramCache]: Analyzing trace with hash -447742602, now seen corresponding path program 1 times [2019-10-13 17:46:49,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:49,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39387877] [2019-10-13 17:46:49,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:49,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:49,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:46:49,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39387877] [2019-10-13 17:46:49,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786294959] [2019-10-13 17:46:49,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:46:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:49,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:46:49,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:46:49,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:49,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 17:46:49,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878565576] [2019-10-13 17:46:49,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:46:49,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:49,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:46:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:46:49,739 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 27 states. [2019-10-13 17:46:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:49,936 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2019-10-13 17:46:49,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:46:49,936 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 85 [2019-10-13 17:46:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:49,937 INFO L225 Difference]: With dead ends: 172 [2019-10-13 17:46:49,938 INFO L226 Difference]: Without dead ends: 113 [2019-10-13 17:46:49,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:46:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-13 17:46:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-10-13 17:46:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-13 17:46:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2019-10-13 17:46:49,945 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 85 [2019-10-13 17:46:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:49,946 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2019-10-13 17:46:49,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:46:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2019-10-13 17:46:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 17:46:49,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:49,947 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:50,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:50,151 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:50,151 INFO L82 PathProgramCache]: Analyzing trace with hash -882693228, now seen corresponding path program 2 times [2019-10-13 17:46:50,151 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:50,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807891007] [2019-10-13 17:46:50,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:50,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:50,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:46:50,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807891007] [2019-10-13 17:46:50,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57994578] [2019-10-13 17:46:50,545 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 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 [2019-10-13 17:46:50,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:50,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:50,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:46:50,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:46:50,687 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:50,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-13 17:46:50,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801661402] [2019-10-13 17:46:50,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:46:50,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:50,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:46:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:46:50,689 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 28 states. [2019-10-13 17:46:50,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:50,897 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2019-10-13 17:46:50,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:46:50,898 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2019-10-13 17:46:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:50,899 INFO L225 Difference]: With dead ends: 174 [2019-10-13 17:46:50,899 INFO L226 Difference]: Without dead ends: 115 [2019-10-13 17:46:50,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:46:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-13 17:46:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-13 17:46:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-13 17:46:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2019-10-13 17:46:50,906 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 87 [2019-10-13 17:46:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:50,907 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2019-10-13 17:46:50,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:46:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2019-10-13 17:46:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 17:46:50,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:50,908 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:51,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:51,112 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2036550194, now seen corresponding path program 3 times [2019-10-13 17:46:51,113 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:51,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724472030] [2019-10-13 17:46:51,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:51,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:51,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:46:51,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724472030] [2019-10-13 17:46:51,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593512958] [2019-10-13 17:46:51,433 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 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 [2019-10-13 17:46:51,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:46:51,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:51,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 17:46:51,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:51,994 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:46:51,994 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-10-13 17:46:51,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:46:51,996 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:46:52,000 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:46:52,001 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:46:52,001 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-13 17:46:52,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:46:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2019-10-13 17:46:52,141 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:52,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 43 [2019-10-13 17:46:52,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746113400] [2019-10-13 17:46:52,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-13 17:46:52,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-13 17:46:52,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:46:52,145 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 43 states. [2019-10-13 17:46:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:54,263 INFO L93 Difference]: Finished difference Result 200 states and 226 transitions. [2019-10-13 17:46:54,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-13 17:46:54,264 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 89 [2019-10-13 17:46:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:54,265 INFO L225 Difference]: With dead ends: 200 [2019-10-13 17:46:54,265 INFO L226 Difference]: Without dead ends: 141 [2019-10-13 17:46:54,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1164, Invalid=4688, Unknown=0, NotChecked=0, Total=5852 [2019-10-13 17:46:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-13 17:46:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 102. [2019-10-13 17:46:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-13 17:46:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2019-10-13 17:46:54,276 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 89 [2019-10-13 17:46:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:54,277 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2019-10-13 17:46:54,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-13 17:46:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2019-10-13 17:46:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 17:46:54,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:54,278 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:54,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:54,483 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:54,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:54,484 INFO L82 PathProgramCache]: Analyzing trace with hash -803465335, now seen corresponding path program 13 times [2019-10-13 17:46:54,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:54,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786417333] [2019-10-13 17:46:54,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:54,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:54,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 4 proven. 625 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 17:46:54,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786417333] [2019-10-13 17:46:54,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413095531] [2019-10-13 17:46:54,995 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:55,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 17:46:55,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:46:55,165 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:55,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-13 17:46:55,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597125464] [2019-10-13 17:46:55,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:46:55,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:55,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:46:55,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:46:55,168 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 30 states. [2019-10-13 17:46:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:55,363 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2019-10-13 17:46:55,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:46:55,364 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 99 [2019-10-13 17:46:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:55,365 INFO L225 Difference]: With dead ends: 150 [2019-10-13 17:46:55,365 INFO L226 Difference]: Without dead ends: 105 [2019-10-13 17:46:55,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:46:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-13 17:46:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-10-13 17:46:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-13 17:46:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2019-10-13 17:46:55,377 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 99 [2019-10-13 17:46:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:55,378 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2019-10-13 17:46:55,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:46:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2019-10-13 17:46:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-13 17:46:55,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:55,379 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:55,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:55,585 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 230504743, now seen corresponding path program 14 times [2019-10-13 17:46:55,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:55,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316242134] [2019-10-13 17:46:55,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:55,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:55,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 4 proven. 676 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 17:46:56,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316242134] [2019-10-13 17:46:56,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595183218] [2019-10-13 17:46:56,178 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:56,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:56,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:56,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:46:56,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:46:56,291 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:56,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:46:56,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686786644] [2019-10-13 17:46:56,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:46:56,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:56,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:46:56,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:46:56,292 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 31 states. [2019-10-13 17:46:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:56,425 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2019-10-13 17:46:56,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:46:56,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 101 [2019-10-13 17:46:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:56,427 INFO L225 Difference]: With dead ends: 152 [2019-10-13 17:46:56,428 INFO L226 Difference]: Without dead ends: 107 [2019-10-13 17:46:56,428 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:46:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-13 17:46:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-10-13 17:46:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-13 17:46:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2019-10-13 17:46:56,435 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 101 [2019-10-13 17:46:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:56,435 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2019-10-13 17:46:56,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:46:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2019-10-13 17:46:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 17:46:56,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:56,437 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:56,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:56,640 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1738304325, now seen corresponding path program 15 times [2019-10-13 17:46:56,641 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:56,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304032130] [2019-10-13 17:46:56,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:56,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:56,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 4 proven. 729 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 17:46:57,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304032130] [2019-10-13 17:46:57,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8077876] [2019-10-13 17:46:57,209 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:57,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-13 17:46:57,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:57,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:46:57,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2019-10-13 17:46:57,546 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:57,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 9] total 38 [2019-10-13 17:46:57,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404856471] [2019-10-13 17:46:57,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 17:46:57,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 17:46:57,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=934, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:46:57,548 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 38 states. [2019-10-13 17:46:57,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:57,758 INFO L93 Difference]: Finished difference Result 159 states and 178 transitions. [2019-10-13 17:46:57,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 17:46:57,758 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2019-10-13 17:46:57,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:57,759 INFO L225 Difference]: With dead ends: 159 [2019-10-13 17:46:57,759 INFO L226 Difference]: Without dead ends: 114 [2019-10-13 17:46:57,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=934, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:46:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-13 17:46:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-10-13 17:46:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 17:46:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2019-10-13 17:46:57,769 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 103 [2019-10-13 17:46:57,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:57,769 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2019-10-13 17:46:57,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 17:46:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2019-10-13 17:46:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 17:46:57,770 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:57,770 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:57,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:57,971 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:57,971 INFO L82 PathProgramCache]: Analyzing trace with hash 659558757, now seen corresponding path program 16 times [2019-10-13 17:46:57,971 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:57,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957377487] [2019-10-13 17:46:57,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:57,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:57,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 4 proven. 784 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-13 17:46:58,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957377487] [2019-10-13 17:46:58,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615855794] [2019-10-13 17:46:58,396 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:58,499 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:46:58,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:58,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 17:46:58,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-13 17:46:58,535 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:58,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-13 17:46:58,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338850274] [2019-10-13 17:46:58,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:46:58,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:58,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:46:58,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:46:58,537 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 33 states. [2019-10-13 17:46:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:58,814 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2019-10-13 17:46:58,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:46:58,815 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 108 [2019-10-13 17:46:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:58,816 INFO L225 Difference]: With dead ends: 162 [2019-10-13 17:46:58,816 INFO L226 Difference]: Without dead ends: 114 [2019-10-13 17:46:58,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:46:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-13 17:46:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-10-13 17:46:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-13 17:46:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2019-10-13 17:46:58,823 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 108 [2019-10-13 17:46:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:58,824 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2019-10-13 17:46:58,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:46:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2019-10-13 17:46:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 17:46:58,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:58,825 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:59,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:59,029 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:59,030 INFO L82 PathProgramCache]: Analyzing trace with hash -340270713, now seen corresponding path program 17 times [2019-10-13 17:46:59,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:59,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828844528] [2019-10-13 17:46:59,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:59,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:59,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 4 proven. 841 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-13 17:46:59,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828844528] [2019-10-13 17:46:59,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121130413] [2019-10-13 17:46:59,491 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:01,084 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-10-13 17:47:01,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:01,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:47:01,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2019-10-13 17:47:01,234 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:01,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 10] total 41 [2019-10-13 17:47:01,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179396217] [2019-10-13 17:47:01,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-13 17:47:01,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-13 17:47:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 17:47:01,236 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 41 states. [2019-10-13 17:47:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:01,580 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2019-10-13 17:47:01,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 17:47:01,580 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 110 [2019-10-13 17:47:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:01,582 INFO L225 Difference]: With dead ends: 169 [2019-10-13 17:47:01,582 INFO L226 Difference]: Without dead ends: 121 [2019-10-13 17:47:01,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 17:47:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-13 17:47:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2019-10-13 17:47:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-13 17:47:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2019-10-13 17:47:01,593 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 110 [2019-10-13 17:47:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:01,594 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2019-10-13 17:47:01,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-13 17:47:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2019-10-13 17:47:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 17:47:01,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:01,595 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:01,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:01,800 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:01,801 INFO L82 PathProgramCache]: Analyzing trace with hash 773087327, now seen corresponding path program 18 times [2019-10-13 17:47:01,801 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:01,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405494223] [2019-10-13 17:47:01,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:01,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:01,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 4 proven. 900 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-13 17:47:02,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405494223] [2019-10-13 17:47:02,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082818194] [2019-10-13 17:47:02,284 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:02,569 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 17:47:02,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:02,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:47:02,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2019-10-13 17:47:02,735 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:02,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-10-13 17:47:02,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850272577] [2019-10-13 17:47:02,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-13 17:47:02,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-13 17:47:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:47:02,737 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 43 states. [2019-10-13 17:47:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:03,169 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2019-10-13 17:47:03,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-13 17:47:03,170 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 115 [2019-10-13 17:47:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:03,171 INFO L225 Difference]: With dead ends: 177 [2019-10-13 17:47:03,171 INFO L226 Difference]: Without dead ends: 126 [2019-10-13 17:47:03,172 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:47:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-13 17:47:03,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2019-10-13 17:47:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-10-13 17:47:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2019-10-13 17:47:03,182 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 115 [2019-10-13 17:47:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:03,183 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2019-10-13 17:47:03,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-13 17:47:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2019-10-13 17:47:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 17:47:03,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:03,185 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:03,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:03,390 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash -249173237, now seen corresponding path program 19 times [2019-10-13 17:47:03,391 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:03,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412699144] [2019-10-13 17:47:03,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:03,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:03,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 4 proven. 961 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-13 17:47:03,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412699144] [2019-10-13 17:47:03,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043982902] [2019-10-13 17:47:03,902 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:04,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 17:47:04,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-13 17:47:04,065 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:04,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-13 17:47:04,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854588618] [2019-10-13 17:47:04,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:47:04,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:04,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:47:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:47:04,067 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 36 states. [2019-10-13 17:47:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:04,348 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2019-10-13 17:47:04,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 17:47:04,349 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 120 [2019-10-13 17:47:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:04,350 INFO L225 Difference]: With dead ends: 180 [2019-10-13 17:47:04,351 INFO L226 Difference]: Without dead ends: 126 [2019-10-13 17:47:04,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:47:04,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-13 17:47:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-10-13 17:47:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-13 17:47:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2019-10-13 17:47:04,362 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 120 [2019-10-13 17:47:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:04,362 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2019-10-13 17:47:04,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:47:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2019-10-13 17:47:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 17:47:04,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:04,364 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:04,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:04,568 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1975293997, now seen corresponding path program 20 times [2019-10-13 17:47:04,569 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:04,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140288158] [2019-10-13 17:47:04,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:04,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:04,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 4 proven. 1024 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-13 17:47:05,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140288158] [2019-10-13 17:47:05,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871876627] [2019-10-13 17:47:05,359 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:05,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:05,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:05,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-13 17:47:05,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-13 17:47:05,528 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:05,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-13 17:47:05,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587048492] [2019-10-13 17:47:05,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:47:05,530 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:47:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:47:05,531 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 37 states. [2019-10-13 17:47:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:05,702 INFO L93 Difference]: Finished difference Result 182 states and 204 transitions. [2019-10-13 17:47:05,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:47:05,703 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 122 [2019-10-13 17:47:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:05,704 INFO L225 Difference]: With dead ends: 182 [2019-10-13 17:47:05,704 INFO L226 Difference]: Without dead ends: 128 [2019-10-13 17:47:05,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:47:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-13 17:47:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-10-13 17:47:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-13 17:47:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2019-10-13 17:47:05,713 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 122 [2019-10-13 17:47:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:05,713 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2019-10-13 17:47:05,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:47:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2019-10-13 17:47:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 17:47:05,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,715 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:05,920 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,921 INFO L82 PathProgramCache]: Analyzing trace with hash 794592463, now seen corresponding path program 21 times [2019-10-13 17:47:05,921 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660787628] [2019-10-13 17:47:05,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 4 proven. 1089 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-13 17:47:06,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660787628] [2019-10-13 17:47:06,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700350221] [2019-10-13 17:47:06,481 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:47:06,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:06,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 17:47:06,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:06,914 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 17:47:06,914 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:06,916 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:06,916 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:06,916 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:47:06,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 1147 trivial. 0 not checked. [2019-10-13 17:47:07,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:07,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2019-10-13 17:47:07,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816409696] [2019-10-13 17:47:07,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-13 17:47:07,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:07,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-13 17:47:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1878, Unknown=0, NotChecked=0, Total=2550 [2019-10-13 17:47:07,017 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 51 states. [2019-10-13 17:47:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:09,426 INFO L93 Difference]: Finished difference Result 222 states and 254 transitions. [2019-10-13 17:47:09,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-13 17:47:09,426 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 124 [2019-10-13 17:47:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:09,428 INFO L225 Difference]: With dead ends: 222 [2019-10-13 17:47:09,428 INFO L226 Difference]: Without dead ends: 168 [2019-10-13 17:47:09,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1999, Invalid=7121, Unknown=0, NotChecked=0, Total=9120 [2019-10-13 17:47:09,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-13 17:47:09,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2019-10-13 17:47:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-13 17:47:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2019-10-13 17:47:09,441 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 124 [2019-10-13 17:47:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:09,441 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2019-10-13 17:47:09,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-13 17:47:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2019-10-13 17:47:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:47:09,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:09,443 INFO L380 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:09,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,647 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:09,647 INFO L82 PathProgramCache]: Analyzing trace with hash -128764177, now seen corresponding path program 4 times [2019-10-13 17:47:09,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:09,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514284588] [2019-10-13 17:47:09,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 4 proven. 1156 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-13 17:47:10,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514284588] [2019-10-13 17:47:10,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492482206] [2019-10-13 17:47:10,226 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