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_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:49,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:49,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:49,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:49,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:49,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:49,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:49,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:49,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:49,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:49,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:49,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:49,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:49,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:49,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:49,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:49,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:49,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:49,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:49,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:49,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:49,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:49,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:49,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:49,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:49,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:49,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:49,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:49,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:49,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:49,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:49,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:49,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:49,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:49,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:49,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:49,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:46:49,174 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:49,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:49,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:49,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:49,176 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:49,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:49,176 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:49,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:49,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:49,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:49,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:49,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:49,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:49,177 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:49,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:49,178 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:49,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:49,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:49,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:49,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:49,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:49,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:49,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:49,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:49,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:49,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:49,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:49,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:49,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:49,483 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:49,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:49,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:49,506 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:49,507 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:49,507 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2019-10-14 21:46:49,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/201cbdc11/8b98f6800cfb4afcb823d26c69d1ac31/FLAG154381512 [2019-10-14 21:46:50,062 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:50,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2019-10-14 21:46:50,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/201cbdc11/8b98f6800cfb4afcb823d26c69d1ac31/FLAG154381512 [2019-10-14 21:46:50,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/201cbdc11/8b98f6800cfb4afcb823d26c69d1ac31 [2019-10-14 21:46:50,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:50,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:50,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:50,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:50,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:50,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc683dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50, skipping insertion in model container [2019-10-14 21:46:50,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,446 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:50,467 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:50,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:50,666 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:50,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:50,708 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:50,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50 WrapperNode [2019-10-14 21:46:50,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:50,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:50,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:50,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:50,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (1/1) ... [2019-10-14 21:46:50,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:50,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:50,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:50,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:50,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:50,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:50,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:50,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:50,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:50,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:50,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:50,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:51,159 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:51,159 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:51,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:51 BoogieIcfgContainer [2019-10-14 21:46:51,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:51,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:51,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:51,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:51,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:50" (1/3) ... [2019-10-14 21:46:51,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4eda23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:51, skipping insertion in model container [2019-10-14 21:46:51,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:50" (2/3) ... [2019-10-14 21:46:51,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4eda23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:51, skipping insertion in model container [2019-10-14 21:46:51,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:51" (3/3) ... [2019-10-14 21:46:51,170 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2019-10-14 21:46:51,183 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:51,193 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:51,207 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:51,241 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:51,241 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:51,241 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:51,241 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:51,242 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:51,242 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:51,242 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:51,242 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-14 21:46:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:51,269 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:51,271 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:51,274 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:51,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1229081071, now seen corresponding path program 1 times [2019-10-14 21:46:51,292 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:51,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297735307] [2019-10-14 21:46:51,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:51,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:51,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:51,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297735307] [2019-10-14 21:46:51,461 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:51,461 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:51,461 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653175128] [2019-10-14 21:46:51,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:51,466 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:51,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:51,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:51,486 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-14 21:46:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:51,590 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2019-10-14 21:46:51,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:51,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:46:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:51,601 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:46:51,601 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:46:51,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:51,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:46:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 21:46:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 21:46:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-14 21:46:51,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-10-14 21:46:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:51,646 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-14 21:46:51,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-14 21:46:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:46:51,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:51,647 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:51,648 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash -959296020, now seen corresponding path program 1 times [2019-10-14 21:46:51,649 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:51,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709858102] [2019-10-14 21:46:51,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:51,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:51,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:51,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709858102] [2019-10-14 21:46:51,772 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:51,772 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:51,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650471929] [2019-10-14 21:46:51,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:51,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:51,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:51,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:51,778 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2019-10-14 21:46:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:51,854 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2019-10-14 21:46:51,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:51,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:46:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:51,856 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:46:51,856 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:46:51,857 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:46:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:46:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:46:51,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-10-14 21:46:51,864 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2019-10-14 21:46:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:51,865 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-10-14 21:46:51,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:51,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-10-14 21:46:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:46:51,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:51,866 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:51,867 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash 71345632, now seen corresponding path program 1 times [2019-10-14 21:46:51,868 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:51,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472806375] [2019-10-14 21:46:51,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:51,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:51,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:51,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472806375] [2019-10-14 21:46:51,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145417712] [2019-10-14 21:46:51,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:52,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:52,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:52,116 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:52,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:46:52,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733622298] [2019-10-14 21:46:52,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:46:52,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:46:52,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:52,128 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2019-10-14 21:46:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:52,222 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-10-14 21:46:52,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:46:52,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-14 21:46:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:52,224 INFO L225 Difference]: With dead ends: 39 [2019-10-14 21:46:52,224 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:46:52,225 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:46:52,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:46:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:46:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-14 21:46:52,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2019-10-14 21:46:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:52,231 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-14 21:46:52,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:46:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-14 21:46:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:52,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:52,233 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:52,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:52,437 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:52,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1956465772, now seen corresponding path program 2 times [2019-10-14 21:46:52,439 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:52,439 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112630927] [2019-10-14 21:46:52,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:52,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:52,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:52,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112630927] [2019-10-14 21:46:52,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125264814] [2019-10-14 21:46:52,537 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:52,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:46:52,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:52,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:46:52,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:52,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:52,733 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:46:52,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-10-14 21:46:52,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917866926] [2019-10-14 21:46:52,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:52,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:52,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:52,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:52,736 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2019-10-14 21:46:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:52,877 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-10-14 21:46:52,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:52,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-14 21:46:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:52,880 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:46:52,881 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:46:52,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:46:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2019-10-14 21:46:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:46:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:46:52,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2019-10-14 21:46:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:52,900 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:46:52,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:46:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:52,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:52,903 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:53,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:53,109 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:53,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1563438762, now seen corresponding path program 1 times [2019-10-14 21:46:53,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:53,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172731915] [2019-10-14 21:46:53,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:53,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:53,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:53,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172731915] [2019-10-14 21:46:53,201 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:53,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:46:53,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393750614] [2019-10-14 21:46:53,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:46:53,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:46:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:46:53,203 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2019-10-14 21:46:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:53,310 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-10-14 21:46:53,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:46:53,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 21:46:53,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:53,313 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:46:53,313 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:46:53,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:46:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-10-14 21:46:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:46:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 21:46:53,319 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-14 21:46:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:53,320 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 21:46:53,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:46:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 21:46:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:46:53,321 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:53,321 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:53,321 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash -304823251, now seen corresponding path program 1 times [2019-10-14 21:46:53,322 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:53,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804817678] [2019-10-14 21:46:53,323 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:53,323 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:53,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:53,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804817678] [2019-10-14 21:46:53,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817004327] [2019-10-14 21:46:53,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:53,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:53,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:53,482 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:53,482 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:46:53,482 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371639351] [2019-10-14 21:46:53,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:53,483 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:53,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:53,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:53,484 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2019-10-14 21:46:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:53,550 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-10-14 21:46:53,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:53,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-10-14 21:46:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:53,551 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:46:53,552 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:46:53,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:46:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:46:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:46:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-14 21:46:53,569 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2019-10-14 21:46:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:53,569 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-14 21:46:53,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-14 21:46:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:46:53,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:53,570 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:53,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:53,772 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:53,772 INFO L82 PathProgramCache]: Analyzing trace with hash -81574727, now seen corresponding path program 2 times [2019-10-14 21:46:53,772 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:53,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196583851] [2019-10-14 21:46:53,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:53,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:53,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:53,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196583851] [2019-10-14 21:46:53,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790985699] [2019-10-14 21:46:53,853 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:53,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:53,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:53,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:53,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:53,937 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:53,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:46:53,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98465873] [2019-10-14 21:46:53,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:46:53,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:53,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:46:53,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:53,940 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2019-10-14 21:46:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:54,026 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-10-14 21:46:54,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:54,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:46:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:54,028 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:46:54,028 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:46:54,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:46:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 21:46:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:46:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-14 21:46:54,036 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2019-10-14 21:46:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:54,037 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-14 21:46:54,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:46:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-14 21:46:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:46:54,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:54,042 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:54,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:54,253 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:54,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1750805075, now seen corresponding path program 3 times [2019-10-14 21:46:54,254 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:54,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868973073] [2019-10-14 21:46:54,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:54,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868973073] [2019-10-14 21:46:54,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636899319] [2019-10-14 21:46:54,355 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:54,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:46:54,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:54,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:46:54,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:54,455 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-10-14 21:46:54,455 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:54,467 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:54,467 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:54,468 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-14 21:46:54,507 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-10-14 21:46:54,508 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:54,517 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:54,517 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:54,517 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-14 21:46:54,567 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-14 21:46:54,568 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:54,571 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:54,572 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:54,572 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-14 21:46:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:46:54,606 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:54,606 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-14 21:46:54,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33852684] [2019-10-14 21:46:54,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:46:54,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:54,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:46:54,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:54,608 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 14 states. [2019-10-14 21:46:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:54,970 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2019-10-14 21:46:54,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:54,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2019-10-14 21:46:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:54,972 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:46:54,973 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:46:54,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:46:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-14 21:46:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:46:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-10-14 21:46:54,981 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 25 [2019-10-14 21:46:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:54,982 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-10-14 21:46:54,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:46:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-10-14 21:46:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:46:54,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:54,983 INFO L380 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:55,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:55,190 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1844458623, now seen corresponding path program 1 times [2019-10-14 21:46:55,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:55,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869887396] [2019-10-14 21:46:55,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:46:55,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869887396] [2019-10-14 21:46:55,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780487871] [2019-10-14 21:46:55,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:55,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:55,371 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:55,371 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:46:55,371 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887476243] [2019-10-14 21:46:55,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:55,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:55,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:55,373 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2019-10-14 21:46:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:55,448 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2019-10-14 21:46:55,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:46:55,449 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-10-14 21:46:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:55,451 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:46:55,452 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:46:55,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:46:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-14 21:46:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:46:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-10-14 21:46:55,459 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 35 [2019-10-14 21:46:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:55,460 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-10-14 21:46:55,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-10-14 21:46:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:46:55,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:55,461 INFO L380 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:55,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:55,665 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:55,666 INFO L82 PathProgramCache]: Analyzing trace with hash 222681613, now seen corresponding path program 2 times [2019-10-14 21:46:55,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:55,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544710730] [2019-10-14 21:46:55,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:46:55,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544710730] [2019-10-14 21:46:55,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624579049] [2019-10-14 21:46:55,775 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:55,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:55,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:55,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:46:55,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:55,840 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:55,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:46:55,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209048505] [2019-10-14 21:46:55,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:46:55,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:46:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:55,842 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 11 states. [2019-10-14 21:46:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:55,925 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2019-10-14 21:46:55,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:55,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2019-10-14 21:46:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:55,926 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:46:55,926 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:46:55,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:46:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:46:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:46:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-14 21:46:55,933 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2019-10-14 21:46:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:55,934 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-14 21:46:55,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:46:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-14 21:46:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:46:55,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:55,935 INFO L380 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:56,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,140 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:56,140 INFO L82 PathProgramCache]: Analyzing trace with hash -120480511, now seen corresponding path program 3 times [2019-10-14 21:46:56,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:56,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115054460] [2019-10-14 21:46:56,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:56,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:56,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:46:56,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115054460] [2019-10-14 21:46:56,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991993651] [2019-10-14 21:46:56,233 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,286 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:46:56,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:56,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:46:56,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:46:56,513 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:56,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-10-14 21:46:56,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055036786] [2019-10-14 21:46:56,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:46:56,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:56,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:46:56,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:56,515 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 19 states. [2019-10-14 21:46:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:57,054 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2019-10-14 21:46:57,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:46:57,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2019-10-14 21:46:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:57,061 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:46:57,061 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:46:57,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:46:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:46:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2019-10-14 21:46:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:46:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-14 21:46:57,069 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2019-10-14 21:46:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:57,070 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-14 21:46:57,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:46:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-14 21:46:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:46:57,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,071 INFO L380 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:57,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,279 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:57,280 INFO L82 PathProgramCache]: Analyzing trace with hash 437451791, now seen corresponding path program 1 times [2019-10-14 21:46:57,280 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143078438] [2019-10-14 21:46:57,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:46:57,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143078438] [2019-10-14 21:46:57,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060638466] [2019-10-14 21:46:57,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:57,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:57,468 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:57,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:46:57,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814478505] [2019-10-14 21:46:57,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:57,469 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:57,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:57,470 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 13 states. [2019-10-14 21:46:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:57,569 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-10-14 21:46:57,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:57,570 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-10-14 21:46:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:57,571 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:46:57,571 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:46:57,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:57,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:46:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-14 21:46:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:46:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 21:46:57,582 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 38 [2019-10-14 21:46:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:57,582 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 21:46:57,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 21:46:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:46:57,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,583 INFO L380 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:57,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,784 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1371132419, now seen corresponding path program 2 times [2019-10-14 21:46:57,785 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980025269] [2019-10-14 21:46:57,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:46:57,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980025269] [2019-10-14 21:46:57,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175894494] [2019-10-14 21:46:57,918 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:57,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:57,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:46:57,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:57,989 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:57,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:46:57,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516553721] [2019-10-14 21:46:57,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:46:57,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:46:57,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:57,991 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-14 21:46:58,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,066 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-10-14 21:46:58,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:46:58,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-10-14 21:46:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,068 INFO L225 Difference]: With dead ends: 75 [2019-10-14 21:46:58,068 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:46:58,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:46:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:46:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:46:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-10-14 21:46:58,076 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2019-10-14 21:46:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,076 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-10-14 21:46:58,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:46:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-10-14 21:46:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:46:58,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,077 INFO L380 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,281 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,282 INFO L82 PathProgramCache]: Analyzing trace with hash 250460815, now seen corresponding path program 3 times [2019-10-14 21:46:58,282 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295012577] [2019-10-14 21:46:58,283 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,283 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:46:58,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295012577] [2019-10-14 21:46:58,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994668459] [2019-10-14 21:46:58,424 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:46:58,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:58,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:58,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:58,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-14 21:46:58,529 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:58,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 21:46:58,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848640525] [2019-10-14 21:46:58,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:46:58,530 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:58,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:46:58,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:46:58,531 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 17 states. [2019-10-14 21:46:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,888 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2019-10-14 21:46:58,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:46:58,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-10-14 21:46:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,890 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:46:58,890 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:46:58,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:46:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:46:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-10-14 21:46:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:46:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-14 21:46:58,897 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2019-10-14 21:46:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,898 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-14 21:46:58,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:46:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-14 21:46:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:46:58,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,899 INFO L380 BasicCegarLoop]: trace histogram [11, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,103 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2056854566, now seen corresponding path program 4 times [2019-10-14 21:46:59,104 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169703422] [2019-10-14 21:46:59,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:46:59,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169703422] [2019-10-14 21:46:59,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239126573] [2019-10-14 21:46:59,373 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,434 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:59,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:59,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:46:59,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:46:59,455 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:59,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:46:59,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261615175] [2019-10-14 21:46:59,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:46:59,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:46:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:59,457 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 16 states. [2019-10-14 21:46:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:59,549 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2019-10-14 21:46:59,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:59,549 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2019-10-14 21:46:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:59,550 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:46:59,550 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:46:59,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:46:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 21:46:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:46:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-10-14 21:46:59,556 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 44 [2019-10-14 21:46:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:59,557 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-10-14 21:46:59,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:46:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-10-14 21:46:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:46:59,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:59,558 INFO L380 BasicCegarLoop]: trace histogram [12, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,759 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash -481660210, now seen corresponding path program 5 times [2019-10-14 21:46:59,759 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796295189] [2019-10-14 21:46:59,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:46:59,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796295189] [2019-10-14 21:46:59,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811021623] [2019-10-14 21:46:59,921 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,162 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 21:47:00,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:00,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:47:00,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:47:00,203 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:00,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-14 21:47:00,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589459451] [2019-10-14 21:47:00,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:47:00,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:47:00,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:00,210 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 17 states. [2019-10-14 21:47:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:00,320 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2019-10-14 21:47:00,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:47:00,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2019-10-14 21:47:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:00,322 INFO L225 Difference]: With dead ends: 78 [2019-10-14 21:47:00,322 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:47:00,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:47:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-14 21:47:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:47:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2019-10-14 21:47:00,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 45 [2019-10-14 21:47:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:00,331 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2019-10-14 21:47:00,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:47:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2019-10-14 21:47:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:47:00,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:00,332 INFO L380 BasicCegarLoop]: trace histogram [13, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:00,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,537 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1104724570, now seen corresponding path program 6 times [2019-10-14 21:47:00,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:00,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281836013] [2019-10-14 21:47:00,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:47:00,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281836013] [2019-10-14 21:47:00,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216502896] [2019-10-14 21:47:00,701 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,760 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:47:00,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:00,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:47:00,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,774 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-10-14 21:47:00,774 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:00,780 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:00,781 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:00,781 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-14 21:47:00,823 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-10-14 21:47:00,824 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:00,832 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:00,832 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:00,833 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-10-14 21:47:02,900 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#src~0.base_BEFORE_CALL_2| Int) (|v_main_~#dst~0.base_BEFORE_CALL_1| Int)) (and (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_2|) 4) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_1|) 4)) (not (= |v_main_~#src~0.base_BEFORE_CALL_2| |v_main_~#dst~0.base_BEFORE_CALL_1|)))) is different from true [2019-10-14 21:47:04,933 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2019-10-14 21:47:06,967 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 18 [2019-10-14 21:47:07,028 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-14 21:47:07,029 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:07,031 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:07,032 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:07,032 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-14 21:47:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 1 not checked. [2019-10-14 21:47:09,091 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:09,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2019-10-14 21:47:09,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048171729] [2019-10-14 21:47:09,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:47:09,092 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:09,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:47:09,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=556, Unknown=2, NotChecked=50, Total=756 [2019-10-14 21:47:09,093 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 28 states. [2019-10-14 21:47:13,762 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-14 21:47:15,810 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-14 21:47:17,856 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2019-10-14 21:47:22,053 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-10-14 21:47:26,117 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-10-14 21:47:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:28,258 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2019-10-14 21:47:28,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:47:28,259 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2019-10-14 21:47:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:28,260 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:47:28,260 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:47:28,262 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=430, Invalid=1827, Unknown=3, NotChecked=92, Total=2352 [2019-10-14 21:47:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:47:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-14 21:47:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 21:47:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-10-14 21:47:28,268 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 46 [2019-10-14 21:47:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:28,269 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-10-14 21:47:28,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:47:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-10-14 21:47:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:47:28,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:28,270 INFO L380 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:28,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:28,474 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1118319116, now seen corresponding path program 7 times [2019-10-14 21:47:28,475 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:28,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991401385] [2019-10-14 21:47:28,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:28,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:28,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:47:28,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991401385] [2019-10-14 21:47:28,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940909575] [2019-10-14 21:47:28,656 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:28,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:47:28,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:47:28,739 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:28,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:47:28,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63105636] [2019-10-14 21:47:28,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:47:28,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:28,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:47:28,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:47:28,741 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2019-10-14 21:47:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:28,879 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2019-10-14 21:47:28,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:47:28,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2019-10-14 21:47:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:28,880 INFO L225 Difference]: With dead ends: 98 [2019-10-14 21:47:28,880 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:47:28,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:47:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:47:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-14 21:47:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:47:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-10-14 21:47:28,897 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 56 [2019-10-14 21:47:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:28,899 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-10-14 21:47:28,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:47:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-10-14 21:47:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:47:28,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:28,901 INFO L380 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:29,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:29,102 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash -427232512, now seen corresponding path program 8 times [2019-10-14 21:47:29,103 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:29,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182133082] [2019-10-14 21:47:29,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:29,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:29,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:47:29,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182133082] [2019-10-14 21:47:29,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850398713] [2019-10-14 21:47:29,332 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:29,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:29,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:29,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:47:29,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:47:29,429 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:29,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 21:47:29,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741568231] [2019-10-14 21:47:29,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:47:29,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:47:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:29,431 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 20 states. [2019-10-14 21:47:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:29,548 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2019-10-14 21:47:29,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:47:29,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2019-10-14 21:47:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:29,549 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:47:29,550 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:47:29,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:47:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-14 21:47:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:47:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2019-10-14 21:47:29,558 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2019-10-14 21:47:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:29,558 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2019-10-14 21:47:29,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:47:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2019-10-14 21:47:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:47:29,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:29,559 INFO L380 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:29,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:29,763 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1094692724, now seen corresponding path program 9 times [2019-10-14 21:47:29,764 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:29,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555860701] [2019-10-14 21:47:29,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:29,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:29,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:47:29,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555860701] [2019-10-14 21:47:29,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841977936] [2019-10-14 21:47:29,956 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:30,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:47:30,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:30,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:47:30,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:30,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:47:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-14 21:47:30,364 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:30,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2019-10-14 21:47:30,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221849011] [2019-10-14 21:47:30,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:47:30,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:47:30,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:47:30,366 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 30 states. [2019-10-14 21:47:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:31,454 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2019-10-14 21:47:31,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:47:31,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2019-10-14 21:47:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:31,457 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:47:31,457 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 21:47:31,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2019-10-14 21:47:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 21:47:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2019-10-14 21:47:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:47:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-14 21:47:31,469 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 58 [2019-10-14 21:47:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:31,469 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-14 21:47:31,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:47:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-14 21:47:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:47:31,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:31,470 INFO L380 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:31,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:31,674 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash -820595906, now seen corresponding path program 4 times [2019-10-14 21:47:31,675 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:31,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334596038] [2019-10-14 21:47:31,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:31,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:31,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:47:31,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334596038] [2019-10-14 21:47:31,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926034891] [2019-10-14 21:47:31,890 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:31,959 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:31,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:31,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:31,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:32,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:47:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-14 21:47:32,030 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:32,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6] total 25 [2019-10-14 21:47:32,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56510832] [2019-10-14 21:47:32,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:47:32,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:47:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:47:32,032 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 25 states. [2019-10-14 21:47:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:32,548 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2019-10-14 21:47:32,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:47:32,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2019-10-14 21:47:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:32,550 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:47:32,551 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:47:32,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=635, Invalid=1435, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 21:47:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:47:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-10-14 21:47:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:47:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2019-10-14 21:47:32,559 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2019-10-14 21:47:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:32,559 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2019-10-14 21:47:32,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:47:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2019-10-14 21:47:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:47:32,560 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:32,560 INFO L380 BasicCegarLoop]: trace histogram [18, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:32,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:32,764 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:32,765 INFO L82 PathProgramCache]: Analyzing trace with hash 934276045, now seen corresponding path program 10 times [2019-10-14 21:47:32,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:32,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806331670] [2019-10-14 21:47:32,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:32,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:32,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:47:33,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806331670] [2019-10-14 21:47:33,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204132502] [2019-10-14 21:47:33,031 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 [2019-10-14 21:47:33,108 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:33,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:33,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:47:33,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:47:33,124 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:33,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 21:47:33,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921879890] [2019-10-14 21:47:33,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:47:33,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:33,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:47:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:47:33,128 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 23 states. [2019-10-14 21:47:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:33,205 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2019-10-14 21:47:33,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:47:33,209 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2019-10-14 21:47:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:33,210 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:47:33,210 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:47:33,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:47:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:47:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-14 21:47:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 21:47:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-10-14 21:47:33,216 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 63 [2019-10-14 21:47:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:33,216 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-10-14 21:47:33,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:47:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-10-14 21:47:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 21:47:33,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:33,217 INFO L380 BasicCegarLoop]: trace histogram [19, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:33,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:33,422 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1544941657, now seen corresponding path program 11 times [2019-10-14 21:47:33,423 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:33,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098010187] [2019-10-14 21:47:33,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:33,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:33,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:47:33,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098010187] [2019-10-14 21:47:33,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008877217] [2019-10-14 21:47:33,677 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 [2019-10-14 21:47:34,087 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 21:47:34,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:34,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:47:34,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:47:34,106 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:34,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:47:34,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436120437] [2019-10-14 21:47:34,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:47:34,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:47:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:34,108 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2019-10-14 21:47:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:34,237 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2019-10-14 21:47:34,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:47:34,238 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2019-10-14 21:47:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:34,239 INFO L225 Difference]: With dead ends: 109 [2019-10-14 21:47:34,239 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 21:47:34,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 21:47:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-14 21:47:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:47:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2019-10-14 21:47:34,246 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 64 [2019-10-14 21:47:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:34,246 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2019-10-14 21:47:34,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:47:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2019-10-14 21:47:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:47:34,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:34,247 INFO L380 BasicCegarLoop]: trace histogram [20, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:34,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:34,453 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash -999260851, now seen corresponding path program 12 times [2019-10-14 21:47:34,454 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:34,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536939558] [2019-10-14 21:47:34,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:34,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:34,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:47:34,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536939558] [2019-10-14 21:47:34,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806751866] [2019-10-14 21:47:34,746 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 [2019-10-14 21:47:34,998 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:47:34,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:35,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-14 21:47:35,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:35,011 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-10-14 21:47:35,012 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:35,018 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:35,019 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:35,019 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-14 21:47:35,086 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-10-14 21:47:35,086 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:35,096 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:35,096 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:35,096 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-10-14 21:47:37,178 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#src~0.base_BEFORE_CALL_5| Int) (|v_main_~#dst~0.base_BEFORE_CALL_2| Int)) (and (not (= |v_main_~#src~0.base_BEFORE_CALL_5| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_5|) 8) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_2|) 8)))) is different from true [2019-10-14 21:47:39,261 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#src~0.base_BEFORE_CALL_6| Int) (|v_main_~#dst~0.base_BEFORE_CALL_3| Int)) (and (= (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_3|) 8) (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_6|) 8)) (not (= |v_main_~#src~0.base_BEFORE_CALL_6| |v_main_~#dst~0.base_BEFORE_CALL_3|)))) is different from true